Solar Energy Materials and Solar Cells最新文献_第4页

TiO2 and down-conversion phosphors to enhance UV protection of solar cells 二氧化钛和下转换荧光粉增强太阳能电池的紫外线防护能力

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2024-11-07 DOI: 10.1016/j.solmat.2024.113261

Philippe Voarino , Thomas Berthomieu , Clément Jamin , Anthony Barros , Sandrine Therias , Damien Boyer , Loris Ibarrart

{"title":"TiO2 and down-conversion phosphors to enhance UV protection of solar cells","authors":"Philippe Voarino , Thomas Berthomieu , Clément Jamin , Anthony Barros , Sandrine Therias , Damien Boyer , Loris Ibarrart","doi":"10.1016/j.solmat.2024.113261","DOIUrl":"10.1016/j.solmat.2024.113261","url":null,"abstract":"<div><div>In recent years, demand for solar generators for LEO (Low Earth Orbit) applications has been growing, and much research has focused on the use of less expensive and thinner (<90 μm). silicon-based solar cells that can be integrated on flexible Photovoltaic Assemblies (PVAs). These solar cells must be protected from space UV radiations and also withstand more than 50,000 thermal cycles in LEO. The solution advocated here involves the incorporation of UV-absorbing particles into a spatial polymer, combined with lanthanide ions based inorganic phosphors (Y<sub>2</sub>O<sub>3</sub>:Eu<sup>3+</sup> and Y<sub>2</sub>O<sub>2</sub>S:Eu<sup>3+</sup>) to achieve the down-conversion process. Embedded into a silicone-based polymer matrix with a thickness close to 100 μm, these particles are then deposited on 180 μm thick Ga-doped heterojunction silicon cells (30x30 mm<sup>2</sup>). UV tests are carried out on ONERA's SEMIRAMIS platform at two doses: 425 esh and 1005 esh. A series of 1000 thermal cycles is carried out at the CEA. The first spatial UV analysis revealed a maximum loss of almost 5 % in short-circuit current (Isc) for PV devices after 1005 esh. Comparing results in open circuit voltage (Voc), the bare cell degrades as the dose increases (−2 % at 425 esh and −5 % at 1005 esh). One positive point is that the addition of TiO<sub>2</sub> particles protects the solar cell. These initial results point out that it is possible to produce a protective coating to limit the effects of degradation of Silicon cells under space UV flux, with a focus on producing flexible PVAs.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"279 ","pages":"Article 113261"},"PeriodicalIF":6.3,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polyamide 6-Al2O3 nanoparticle composite nanofiber membranes with high solar reflectivity and human radiation transmittance for passive human body cooling 具有高太阳反射率和人体辐射透过率的聚酰胺 6-Al2O3 纳米粒子复合纳米纤维膜，用于人体被动冷却

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2024-11-07 DOI: 10.1016/j.solmat.2024.113270

Mengyao Han , Song Ren , Can Ge , Jian Fang , Hongxia Wang , Tong Lin

{"title":"Polyamide 6-Al2O3 nanoparticle composite nanofiber membranes with high solar reflectivity and human radiation transmittance for passive human body cooling","authors":"Mengyao Han , Song Ren , Can Ge , Jian Fang , Hongxia Wang , Tong Lin","doi":"10.1016/j.solmat.2024.113270","DOIUrl":"10.1016/j.solmat.2024.113270","url":null,"abstract":"<div><div>Passive radiant heat management is an energy-saving thermal radiation management technology that can improve the temperature regulation of conventional clothing in high-temperature environments. However, existing materials are either complex in structure, difficult to fabricate, or unsuitable for human application. In this study, a novel nanofiber membrane was developed that exhibits high solar reflectance and infrared transparency to human radiation, thus having an excellent radiative cooling effect. The nanofiber membrane was prepared by electrospinning polyamide (PA) 6 containing Al<sub>2</sub>O<sub>3</sub> nanoparticles. It exhibits an average solar radiation reflectance of about 88 %, a maximum reflectance of more than 95 %, and transmittance to the human body infrared of more than 95 % and provides a cooling effect of 4–6.4 °C for outdoor objects (with convection), which results from the coaction of PA6 nanofibers and Al<sub>2</sub>O<sub>3</sub> nanoparticles. The implementation of nanofiber membranes in clothing could not only protect wearers from high outdoor temperatures but also improve air and moisture permeability. We hope that this unique nanofiber membrane will be useful for managing thermal comfort and energy efficiency in various applications ranging from architectural materials to personal cooling solutions.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"279 ","pages":"Article 113270"},"PeriodicalIF":6.3,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142662728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analyzing the PN junction impedance of crystalline silicon solar cells across varied illumination and temperature conditions 分析晶体硅太阳能电池在不同光照和温度条件下的 PN 结阻抗

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2024-11-05 DOI: 10.1016/j.solmat.2024.113255

David A. van Nijen, Salem Naoom, Mirco Muttillo, Paul Procel, Miro Zeman, Olindo Isabella, Patrizio Manganiello

{"title":"Analyzing the PN junction impedance of crystalline silicon solar cells across varied illumination and temperature conditions","authors":"David A. van Nijen, Salem Naoom, Mirco Muttillo, Paul Procel, Miro Zeman, Olindo Isabella, Patrizio Manganiello","doi":"10.1016/j.solmat.2024.113255","DOIUrl":"10.1016/j.solmat.2024.113255","url":null,"abstract":"<div><div>The impedance of solar cells can be leveraged for a variety of innovative applications. However, for the continued advancement of such applications, it is crucial to understand how the impedance varies during practical operation. This work characterizes the impedance of modern crystalline silicon solar cells across different bias voltages and under varying illumination and temperature conditions. It is found that for a given bias voltage, variations in temperature have a notably stronger impact on PN junction impedance than changes in irradiance. However, during maximum power point (MPP) tracking, variations in irradiance have a larger influence on the PN junction impedance than temperature variations. This is related to the shifting operating voltage during operation. Furthermore, it is shown that the capacitance during practical operation can strongly vary for different solar cells. For instance, the areal MPP capacitance values of the two cells tested in this study at 0.1 sun irradiance and a temperature of 30 °C were 0.283 <span><math><mi>μ</mi></math></span>F/cm<sup>2</sup> and 20.2 <span><math><mi>μ</mi></math></span>F/cm<sup>2</sup>, a 71-fold difference. Conversely, the range of the MPP diffusion resistance was found to be highly similar for different cells. The results of this study enhance the understanding of solar-cell impedance and have a broad applicability.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"279 ","pages":"Article 113255"},"PeriodicalIF":6.3,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interpretation of the degradation and trends in the performance of heterojunction silicon solar cells at low temperature 解读异质结硅太阳能电池在低温条件下的性能退化和发展趋势

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2024-11-04 DOI: 10.1016/j.solmat.2024.113214

Moustafa Y. Ghannam , Jef Poortmans

{"title":"Interpretation of the degradation and trends in the performance of heterojunction silicon solar cells at low temperature","authors":"Moustafa Y. Ghannam , Jef Poortmans","doi":"10.1016/j.solmat.2024.113214","DOIUrl":"10.1016/j.solmat.2024.113214","url":null,"abstract":"<div><div>A compact model that combines numerical simulations using AFORS-HET and accurate equivalent circuit modelling is proposed and used to interpret the origins of the degradation and anomality's in the performance of the a-Si:H/c-Si heterojunction solar cells and its parameters at low temperature. The interpretations are applied to several trends reported on real cells. It is shown that as T decreases the a-Si:H(i) layer is depleted gradually from holes and that the cell operation fails once the layer is totally depleted and becoming intrinsic. The failure is caused by a substantial and sharp increase in the cell series resistance causing the collapse of the fill factor and of the cell current. It is found that at low temperature the open circuit voltage is significantly affected and its temperature dependence strongly distorted by hole depletion in the a-Si:H(i) spacer especially when the TCO work function is not appropriate. It is aslo shown that the S-shape in the cell I-V characteristics under illumination is closely linked to the TCO barrier reverse saturation current which explains its higher probability of appearnce at low temperature. Finally, it is concluded that the HJT cell would perform optimally down to the low 200 K range when the a-Si:H(p) is heavily doped and the front contact is ideally ohmic. Failing to satisfy such conditions the temperature range in which the HJT cell is useful is very limited.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"279 ","pages":"Article 113214"},"PeriodicalIF":6.3,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Two-step nested optical-electrical Monte-Carlo approach to analyze the influence of tolerances on Micro-CPV module performance 分析公差对微型光电池模块性能影响的两步嵌套光电蒙特卡洛方法

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2024-11-02 DOI: 10.1016/j.solmat.2024.113257

Elisa Kaiser , Maike Wiesenfarth , Peter Schöttl , Marc Steiner , Stefan W. Glunz , Henning Helmers

{"title":"Two-step nested optical-electrical Monte-Carlo approach to analyze the influence of tolerances on Micro-CPV module performance","authors":"Elisa Kaiser , Maike Wiesenfarth , Peter Schöttl , Marc Steiner , Stefan W. Glunz , Henning Helmers","doi":"10.1016/j.solmat.2024.113257","DOIUrl":"10.1016/j.solmat.2024.113257","url":null,"abstract":"<div><div>In manufacturing and product optimization, understanding the influence of tolerances, which are inevitable variations in production processes, is crucial for enhancing performance while managing costs. However, previous analytical approaches lacked the capability to quantitatively assess the cumulative effect of multiple tolerances due to their random combination and statistical independence. In this work, we introduce a novel method that overcomes these limitations by effectively modeling complex dependencies among tolerances through a two-step nested Monte-Carlo approach. We apply this model to a micro-CPV module developed at Fraunhofer ISE. First, we randomly select and combine tolerances in a cell-lens unit using ray tracing. Then, we randomly select and combine these units in a full 690-cell module using an electrical network model considering different angles of incidence. The considered tolerances include deviations in component geometries and displacements and are based on measurements. The model predicts the acceptance angle and allows to identify the optimal interconnection schemes. Further, it is capable to determine the maximum tolerances permissible for maintaining a certain module power. While tolerances lead to a distribution in current generation among the cell-lens units, we find that parallel interconnections can compensate for such variations. Further, we identify that the positions of secondary lens and micro solar cell are the most sensitive parameters for achieving high module power. These findings are crucial for refining module design cost-effectively. Moreover, the model facilitates a quantitative assessment of optimization potentials, guiding decision-making in product development and manufacturing, and a techno-economic optimization.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"279 ","pages":"Article 113257"},"PeriodicalIF":6.3,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing efficiency of dense array CPV receivers with controlled DC-DC converters and adaptive microfluidic cooling under non-uniform solar irradiance 利用可控 DC-DC 转换器和自适应微流体冷却技术提高非均匀太阳辐照条件下密集阵列 CPV 接收器的效率

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2024-11-02 DOI: 10.1016/j.solmat.2024.113262

Desideri Regany , Francesc Majós Palau , Alicia Crespo , Jérôme Barrau , Montse Vilarrubí , Joan Rosell-Urrutia

{"title":"Enhancing efficiency of dense array CPV receivers with controlled DC-DC converters and adaptive microfluidic cooling under non-uniform solar irradiance","authors":"Desideri Regany , Francesc Majós Palau , Alicia Crespo , Jérôme Barrau , Montse Vilarrubí , Joan Rosell-Urrutia","doi":"10.1016/j.solmat.2024.113262","DOIUrl":"10.1016/j.solmat.2024.113262","url":null,"abstract":"<div><div>Concentrating solar technologies offer substantial potential for optimizing solar energy for heat and power generation, particularly in green hydrogen production. This study investigates the use of commercial high efficiency concentrated photovoltaic (CPV) cells in a central tower concentrating solar system to enhance energy conversion efficiency. By integrating DC-DC converters with self-adaptive microfluidic cooling systems, we address current mismatches and temperature variations that affect CPV performance. The novel receiver design ensures scalability for large-scale implementations by implementing the electrical connections between DC-DC converters and each CPV cell without creating shaded areas. We numerically model and simulate the thermodynamic and electrical characteristics of a dense array CPV receiver, evaluating six illumination profiles. Our results indicate a significant improvement in receiver efficiency compared to the traditional configuration with bypass diodes, demonstrating an increase from 23.4 % to 30.3 % under a central Gaussian illumination profile, and reaching up to 38 % relative efficiency improvement depending on the applied profile. Power transfer losses decrease from 26 % to 10 % when 200 kW/m<sup>2</sup> of illumination non-uniformity occurs. The proposed solution enhances reliability and energy conversion efficiency, presenting a viable path forward for large-scale CPV applications.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"279 ","pages":"Article 113262"},"PeriodicalIF":6.3,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of manufacturing tolerances on Micro-CPV assemblies: A quantitative approach based on statistical modeling 制造公差对微型光伏组件的影响：基于统计建模的定量方法

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2024-11-01 DOI: 10.1016/j.solmat.2024.113256

Elisa Kaiser , Maike Wiesenfarth , Peter Schöttl , Marc Steiner , Stefan W. Glunz , Henning Helmers

{"title":"Effect of manufacturing tolerances on Micro-CPV assemblies: A quantitative approach based on statistical modeling","authors":"Elisa Kaiser , Maike Wiesenfarth , Peter Schöttl , Marc Steiner , Stefan W. Glunz , Henning Helmers","doi":"10.1016/j.solmat.2024.113256","DOIUrl":"10.1016/j.solmat.2024.113256","url":null,"abstract":"<div><div>In micro-concentrator photovoltaics (micro-CPV) minimized components as cells (<1 × 1 mm<sup>2</sup>) and lenses are used, promising significant cost reductions through parallel manufacturing and reduced material volumes. However, tolerances, such as deviations from nominal size, geometry or position, impact module performance, especially for non-ideal alignment towards the sun. To study the interplay of different, independent tolerances and their effects on current generation, a comprehensive parameter study is practically not feasible, because of the vast number of possible combinations. In this work, we introduce a novel method for assessing tolerances by employing a Monte-Carlo approach to randomly select and combine tolerances in a cell-lens unit. It allows to identify relevant tolerances and quantitatively assess their influence on module performance, namely optical efficiency, and photocurrent as function of angle of incidence and, thus, acceptance angle. We apply the model to a micro-CPV module developed at Fraunhofer ISE and use tolerance distributions based on measurements. We find that the most crucial parameter is the position of the secondary optical element. Given the measured tolerance distributions, the acceptance angles for 90 % of the cases are above 0.5° for 10 % current loss. The developed approach is a crucial tool for identifying and assessing critical tolerances within a manufacturing line, facilitating techno-economic optimization of design and manufacturing processes.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"279 ","pages":"Article 113256"},"PeriodicalIF":6.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In situ high-temperature emissivity measurements of heat-treated, silicon coated stainless steel for solar thermal applications 热处理硅涂层不锈钢的原位高温发射率测量，用于太阳能热应用

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2024-11-01 DOI: 10.1016/j.solmat.2024.113264

V. Amrutha , Atasi Dan , Jon Gabirondo-Lopez , Telmo Echaniz , Raquel Fuente , Harish C. Barshilia , Gabriel A. Lopez

{"title":"In situ high-temperature emissivity measurements of heat-treated, silicon coated stainless steel for solar thermal applications","authors":"V. Amrutha , Atasi Dan , Jon Gabirondo-Lopez , Telmo Echaniz , Raquel Fuente , Harish C. Barshilia , Gabriel A. Lopez","doi":"10.1016/j.solmat.2024.113264","DOIUrl":"10.1016/j.solmat.2024.113264","url":null,"abstract":"<div><div>Understanding thermal emissivity at high temperatures is crucial for developing efficient materials for solar thermal applications. We present a new approach for creating an efficient material for solar absorber by developing a nano structured surface on stainless steel substrate through Si deposition and annealing. We prepare five samples by annealing them at five temperatures between 700 °C and 1100 °C. Afterwards, we perform a systematic study of the spectral emissivity at elevated temperatures, focusing on different parameters: angle dependence, wavelength dependence, and temperature dependence. The spectral directional emissivity experiments performed in the mid-infrared range reveal a dielectric behavior of the samples in the short wavelength region (<em>λ</em> < 6 μm) and metallic behavior in the long wavelength region (<em>λ</em> > 12 μm). The results indicate an increase in hemispherical and total normal emissivity with measurement temperature (from 200 °C to 700 °C), influenced by oxide/silicide formation due to interdiffusion, and by surface roughness. Notably, samples annealed at 900 °C and 1000 °C demonstrate enhanced thermal stability at 700 °C, showcasing promising characteristics for high-temperature applications. Consequently, this study presents a viable method for developing cost-effective silicon-based solar absorber coatings on stainless steel with tailored properties for solar thermal applications along with its real time high temperature emissivity details.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"279 ","pages":"Article 113264"},"PeriodicalIF":6.3,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interface-enhanced germanium selenide solar cells comprising an ultrathin and uniform antimony selenide buffer layer via hydrothermal approach 通过水热法获得包含超薄均匀硒化锑缓冲层的界面增强型硒化锗太阳能电池

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2024-10-31 DOI: 10.1016/j.solmat.2024.113260

Jing Zhou , Shengwen Yang , Li Gao , Zhenming Qu , Yu Cao , Xiaoming Yu , Xuan Yu , Jian Ni , Jianjun Zhang

{"title":"Interface-enhanced germanium selenide solar cells comprising an ultrathin and uniform antimony selenide buffer layer via hydrothermal approach","authors":"Jing Zhou , Shengwen Yang , Li Gao , Zhenming Qu , Yu Cao , Xiaoming Yu , Xuan Yu , Jian Ni , Jianjun Zhang","doi":"10.1016/j.solmat.2024.113260","DOIUrl":"10.1016/j.solmat.2024.113260","url":null,"abstract":"<div><div>Germanium selenide (GeSe) is a promising thin film photovoltaic absorber material owing to its excellent optoelectronic properties, high stability, and low toxicity. Interface engineering by introducing an ultrathin antimony selenide (Sb<sub>2</sub>Se<sub>3</sub>) buffer layer between the CdS electron transport layer and GeSe absorber layer is an effective technique for enhancing solar cell performance. However, the key to this technique is the fabrication of a uniform and smooth Sb<sub>2</sub>Se<sub>3</sub> buffer layer with minimal thickness. In this study, instead of the conventional closed-space sublimation method, a hydrothermal method was employed to slowly grow an Sb<sub>2</sub>Se<sub>3</sub> buffer layer with a thickness of approximately 8 nm. The Se/Na<sub>2</sub>SO<sub>3</sub> molar ratio in the selenium source during the hydrothermal synthesis was adjusted; a molar ratio of 1:2 led to an uneven Sb<sub>2</sub>Se<sub>3</sub> buffer layer thickness, whereas a molar ratio of 1:10 resulted in the formation of Sb<sub>2</sub>O<sub>3</sub> particles on the buffer layer surface. When the Se/Na<sub>2</sub>SO<sub>3</sub> molar ratio was 1:6, a smooth, uniform, dense, and impurity-free Sb<sub>2</sub>Se<sub>3</sub> buffer layer was obtained, achieving the highest efficiency of 3.33 % in a GeSe solar cell. Moreover, GeSe solar cells with hydrothermally grown Sb<sub>2</sub>Se<sub>3</sub> buffer layers demonstrated superior device interface properties and efficiency comparable with those using Sb<sub>2</sub>Se<sub>3</sub> buffer layers deposited via closed-space sublimation. This technique offers an effective method for steadily improving the performance of GeSe solar cells.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"279 ","pages":"Article 113260"},"PeriodicalIF":6.3,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142554350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermally driven memory flexible phase change hydrogel for solar energy efficient building thermal management 用于太阳能高效建筑热管理的热驱动记忆柔性相变水凝胶

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2024-10-30 DOI: 10.1016/j.solmat.2024.113248

Yujiao Guo , Xiangrui Guo , Xue Yin , Xiangdong Zhang , Shuwen Hu , Yumeng Zhang , Huizhi Yang

{"title":"Thermally driven memory flexible phase change hydrogel for solar energy efficient building thermal management","authors":"Yujiao Guo , Xiangrui Guo , Xue Yin , Xiangdong Zhang , Shuwen Hu , Yumeng Zhang , Huizhi Yang","doi":"10.1016/j.solmat.2024.113248","DOIUrl":"10.1016/j.solmat.2024.113248","url":null,"abstract":"<div><div>Sodium sulfate decahydrate (SSD), as a typical inorganic phase change material (PCM), can be used to improve solar energy utilization efficiency and thermal management. However, its inherent problems of leakage, phase separation and strong rigidity severely limit its practical application. In this work, a phase change hydrogel with shape remembering behavior and high photothermal conversion capability was designed using konjac glucan and acrylamide copolymer as supporting material, SSD as PCM, and hydrothermal carbon (HTC) as photothermal converter and thermal conductive filler. In view of the hydrogel hydrophilic cross-linked 3D network, good compatibility with SSD, can effectively solve the problem of SSD high temperature leakage, SSD packaging efficiency up to 90.4 wt%. At the same time, HTC forms a continuous and effective photothermal conversion and thermal conductivity path with the help of the 3D network of hydrogel, and the phase change hydrogel shows excellent photothermal conversion performance and thermal conductivity (0.89–1.11 W m<sup>−1</sup> K<sup>−1</sup>). In addition, the phase change hydrogels exhibited excellent thermally driven shape memory behavior (385 s) and mechanical strength up to 0.67 MPa. This provides a new feasible way to construct green buildings instead of air conditioning for winter insulation.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"279 ","pages":"Article 113248"},"PeriodicalIF":6.3,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142539887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0