Solar Energy Materials and Solar Cells最新文献

{"title":"Impact of laser-enhanced contact optimization on n-TOPCon solar cells' performance and efficiency: Experimental and simulated insights","authors":"Qinqin Wang ,&nbsp;Kaiyuan Guo ,&nbsp;Siwen Gu ,&nbsp;Wangping Wu ,&nbsp;Lvzhou Li ,&nbsp;Deniz Eren Erişen ,&nbsp;Gao Yong ,&nbsp;Jianning Ding","doi":"10.1016/j.solmat.2025.113526","DOIUrl":"10.1016/j.solmat.2025.113526","url":null,"abstract":"<div><div>The laser-enhanced contact optimization (LECO) process, instead of the conventional high-temperature sintering process on the tunnel oxide passivated contact (TOPCon) solar cells, is being migrated to mainstream technology, with ongoing improvements in recent years. This study examines the impact of various process parameters—including sintering temperature, laser power, and reverse voltage—within the LECO process on the metallization-induced recombination current density associated with metal contact (denoted as <em>J</em>_<em>0</em><em>,</em>_{<em>metal</em>}), contact resistivity (represented as <em>ρ</em>_<em>c</em>), and current-voltage (I-V) characteristics. On the basis of the experiment, COMSOL simulations were introduced to model the changes in charge carrier dynamics during LECO. The influence of laser power and reverse voltage on the front surface electron concentration was systematically investigated and confirmed. The findings indicated that appropriately reducing the sintering temperature can significantly decrease metallization recombination. At the same time, the open-circuit voltage (<em>V</em>_<em>oc</em>) showed a negative correlation with both the laser energy and reverse voltage. Conversely, the fill factor (<em>FF</em>) and contact resistivity (<em>ρ</em>_<em>c</em>) positively correlated with these factors. Data from ρ_c and I-V measurements demonstrated that adequate laser energy is crucial for achieving sufficient carrier concentrations, which is necessary for minimizing ρ_c. However, excessively high laser energy may harm the passivation layer. Simulation analysis confirmed that the laser in the LECO process generates electron-hole pairs, while the reverse voltage separates the electrons and holes. We implemented the LECO process utilizing a sintering temperature of 790 °C, laser power of 18 W, and a reverse voltage of 16 V to enhance the maximum efficiency. (<em>E</em>_<em>ff</em>) of 25.97 %, corresponding to a short-circuit current density (<em>J</em>_<em>sc</em>) of 42.05 mA/cm², a <em>V</em>_<em>oc</em> of 731.5 mV, and a fill factor (<em>FF</em>) of 84.42 %. The findings presented herein provide valuable insights that will inform the subsequent investigation of novel cell structures.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113526"},"PeriodicalIF":6.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464020","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}

{"title":"Enhanced solar desalination via hemispheric distiller with thermal storage, heaters, and condensation: Exergoeconomic and environmental analysis","authors":"Fadl A. Essa ,&nbsp;Bahaa Saleh ,&nbsp;Abdullah A. Algethami ,&nbsp;Sunday O. Oyedepo ,&nbsp;Z.M. Omara ,&nbsp;Mahmoud S. El-Sebaey","doi":"10.1016/j.solmat.2025.113529","DOIUrl":"10.1016/j.solmat.2025.113529","url":null,"abstract":"<div><div>The solar distillers suffer from low yield due to the intermittent solar radiation availability, inherent thermal losses, and suboptimal operating temperatures due to design limitations. This study proposes a novel hemispherical -shaped solar distiller (HSD) with integrating jute wicks and thermal storage materials (TSM – paraffin wax mixed with graphite and aluminum oxides nanoparticles) for enhanced potable water production in remote areas. The HSD had 5000 cm² projected area. Compared to the conventional solar distiller (CSD), the freshwater production of HSD was improved by 90.74 % and 41.73 % with and without TSM, respectively. The implementation of electric heaters (20 W) and an external condenser further propels freshwater production, reaching a significant 145 % improvement compared to that of CSD. The HSD exhibits superior performance as compared to CSD based on the freshwater production and efficiency parameters. With all enhancements integrated, the daily distillate yield reached 6370 mL/m², and both energy and exergy efficiencies were 48.2 % and 4.9 %, respectively. Moreover, the environmental factor for CSD, HSD, HSD with TSM, HSD with TSM &amp; heaters, and HSD with TSM, heaters &amp; condenser is determined as 13, 18.4, 24.8, 29.7, and 26 tons CO₂ a year respectively. Economically, the HSD proved its merit with a significantly reduced cost per liter of distilled water. While the CSD had a cost of $0.32 per liter, the HSD with all enhancements reduced this cost to $0.19. In conclusion, the HSD with integrated jute wicks, TSM, heaters, and condenser represents a significant advancement in solar desalination technology.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113529"},"PeriodicalIF":6.3,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464021","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}

{"title":"Enhancing the stability of methylammonium-based perovskite solar cells prepared in ambient conditions by adding formamidinium cations","authors":"Lucas Polimante,&nbsp;Juliana Pereira da Silva,&nbsp;Fabio Furlan Ferreira,&nbsp;Andre Sarto Polo","doi":"10.1016/j.solmat.2025.113522","DOIUrl":"10.1016/j.solmat.2025.113522","url":null,"abstract":"<div><div>Perovskite solar cells (PSCs) represent an up-and-coming emerging technology for the future of clean and renewable energy generation. However, these devices still suffer stability and durability issues due to moisture when exposed and/or prepared under ambient conditions. Here, we investigate the influence of incorporating formamidinium cation into methylammonium-based lead iodide perovskite films to improve the stability of PSCs. The amount of FA⁺ ranges from 0 (pure MAPI) to 1 (pure FAPI) perovskite passing by different amounts (FA_0.125MA_0.875PI, FA_0.25MA_0.75PI, FA_0.5MA_0.5PI). All the solutions and deposition of each film are performed in an uncontrolled ambient atmosphere (relative humidity ranging from 40 % to 60 %), aiming to replicate scalable manufacturing environments. The perovskite films present high crystallinity and uniformity, confirmed by the X-ray patterns, corroborating the predominantly photoactive FAPI α-phase or the MAPI cubic one. Scanning electron microscopy (SEM) images reveal that increasing FA⁺ content leads to larger grain sizes, reducing grain boundaries. Absorption spectra present a gradual red shift from MAPI to FAPI perovskites due to increased FA⁺ content, corresponding with the bandgap energy analysis. PSCs present photocurrent conversion efficiencies up to 13.4 %, and the photocurrent action spectra confirm the absorption observation, presenting energy conversion in higher wavelengths as the FA⁺ contents increase. A long-term stability experiment reveals that perovskites with more than 25 % FA⁺ maintain their efficiency over 80 % after 2160 h, a longer durability than MAPI PSCs. The durability improvement is ascribed to incorporating FA⁺ into the MAPI perovskite crystal lattice, which changes the grain size, surface area, and grain boundaries.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113522"},"PeriodicalIF":6.3,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454334","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}

{"title":"Interconnection of low-temperature metallization on silicon solar cells - The role of silver in tin-bismuth-based solder alloys","authors":"Derya Güldali ,&nbsp;Angela De Rose ,&nbsp;Max Mittag ,&nbsp;Benjamin Grübel ,&nbsp;Holger Neuhaus ,&nbsp;Ulrich Tetzlaff","doi":"10.1016/j.solmat.2025.113488","DOIUrl":"10.1016/j.solmat.2025.113488","url":null,"abstract":"<div><div>This study investigates the potential of tin-bismuth (SnBi) alloys micro-alloyed with silver (Ag) to enhance low-temperature (LT) soldering for photovoltaic (PV) modules. The primary focus is on addressing challenges such as intermetallic compound (IMC) formation, which can compromise mechanical strength and durability under thermal cycling, thereby improving the long-term stability of solder joints. A systematic investigation of the influence of the Ag amount is being conducted with the intention to find the optimal alloy composition for SnBi solder joints on LT metallization contacts. The objective is to provide a cost-effective, lead-free alternative for the interconnection of temperature-sensitive solar cells like silicon heterojunction (SHJ) cells. The findings illustrate that the addition of 0.4 %_wt. Ag notably enhances the wettability and initial mechanical strength of the solder. An increase in the Ag content to 1.0 %_wt. results in an excessive growth of IMC, which in turn leads to increased brittleness and potential long-term stability issues of the solder joint. Thermal cycling tests demonstrate that modules soldered with SnBiAg0.4 exhibited less than -5 % loss in power. This composition represents an optimal balance between performance and cost. These findings show the potential of SnBiAg0.4 as a suitable solder alloy regarding long-term stability and electrical performance for interconnection of LT metallization contacts of solar cells in PV module manufacturing.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113488"},"PeriodicalIF":6.3,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454332","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}

{"title":"Optimization of large-area photovoltaic module frames for lightweight design using structural analysis and non-dominated sorting genetic algorithm II","authors":"Yohan Noh ,&nbsp;Junghoon Kim ,&nbsp;Chaehwan Jeong ,&nbsp;Jaehyeong Lee","doi":"10.1016/j.solmat.2025.113524","DOIUrl":"10.1016/j.solmat.2025.113524","url":null,"abstract":"<div><div>Although solar power is commonly considered a green energy source that can reduce carbon emissions, it emits a significant amount of carbon in its entirety, from the production of components and equipment to their use and disposal. In particular, frames that protect the edges of photovoltaic (PV) modules and provide mechanical strength to facilitate installation use aluminum as the primary material, which is produced by electrolyzing alumina derived from bauxite. This process produces a large amount of carbon dioxide: 11.3 kg per kilogram of aluminum.</div><div>As research on large-area PV modules to achieve high power and efficiency progresses, the use of components such as cover glass and aluminum frames and the weight of PV modules increase; thus, it is difficult to construct and maintain mechanical properties that can withstand external forces such as wind and snow loads. Therefore, complex research is required, including the design of lightweight frames that can secure the mechanical properties of large-area PV modules while reducing the amount of aluminum used.</div><div>In this study, we used the non-dominated sorting genetic algorithm-II (NSGA-II), a meta-heuristic optimization technique, and structural analysis simulation to design a lightweight frame model with mechanical strength similar to that of existing commercial frames while using less aluminum to reduce carbon emissions. We applied the proposed frame to a large-area PV module and compared its mechanical properties with those of a PV module with a commercial frame through mechanical load tests. Consequently, we present a frame model with mechanical properties similar to those of an existing PV module under mechanical loads in the range of 2400–7200 Pa while reducing the cross-sectional area by 10.13 %.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113524"},"PeriodicalIF":6.3,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463547","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}

{"title":"High quality (AlGa)0.8In0.2As material with very low threading dislocation density grown on Ge through compositionally graded buffer integrated with strained-layer superlattices","authors":"Wenyi Yang ,&nbsp;Xiaobin Zhang ,&nbsp;Xinyi Li ,&nbsp;Zimin Chen ,&nbsp;Shuyi Zhang ,&nbsp;Tingbao Wang ,&nbsp;Gang Wang","doi":"10.1016/j.solmat.2025.113527","DOIUrl":"10.1016/j.solmat.2025.113527","url":null,"abstract":"<div><div>Strained-layer superlattices (SLSs) can be used to filter the threading dislocations (TDs) since the misfit strain can annihilate some TDs and suppress the threading dislocation density (TDD) in the followed films. In this work, the In_0.1Ga_0.9As/GaAs SLSs were introduced into the compositionally graded buffer (CGB) structure aiming to grow In_0.2Ga_0.8As layer with low TDD. Epitaxial wafers with (AlGa)_0.8In_0.2As target layers were grown on Ge substrates by using modified CGB structures integrating various In_0.1Ga_0.9As/GaAs SLSs to replace the bottom In_0.05Ga_0.95As layer of CGB. According to cathodoluminescence tests, lower TDDs were clearly observed in the wafers with SLSs. A very low average TDD of 3.5 × 10⁵ cm⁻² was obtained with the structure integrating 10 periods SLSs with individual layer thickness of 12.5 nm, implying that the critical thickness of In_0.1Ga_0.9As layer in SLSs was close to and below 12.5 nm. This point was also verified by the examinations of cross-sectional transmission electron microscopy. The surface morphologies of epitaxial films were studied by atomic force microscopy, and all samples with SLSs exhibited the lower root mean square surface roughness, indicating the better relaxation of target layers. In_0.2Ga_0.8As single-junction solar cells were prepared on Ge substrates by employing six-step CGB layers with and without 10 periods SLSs. The open-circuit voltage (<em>V</em>_<em>oc</em>) has been significantly improved by integrating 10 periods SLSs. The increase in <em>V</em>_<em>oc</em> is attributed to the ultra-low TDD based on 10-QW SLSs, which can effectively reduce non-radiative recombination rate in solar cell. The bandgap-voltage offset (<em>W</em>_<em>oc</em> = <em>E</em>_<em>g</em>/<em>q</em> - <em>V</em>_<em>oc</em>) value of In_0.2Ga_0.8As cell with 10 periods SLSs is 384 mV, which is only a bit higher than 369 mV of the lattice-matched 1.4-eV In_0.01Ga_0.99As cell grown on Ge (R. R. King et al., Prog. Photovolt., 2011, <strong>19</strong>: 797–812), representing excellent crystalline quality of In_0.2Ga_0.8As material.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113527"},"PeriodicalIF":6.3,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454326","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}

{"title":"Preparation of dark Fe/Mn/Zr-doped CaO-based heat carriers for solar-driven thermochemical energy storage","authors":"Qiannian Feng ,&nbsp;Yuan Wei ,&nbsp;Ruicheng Fu ,&nbsp;Yingchao Hu","doi":"10.1016/j.solmat.2025.113532","DOIUrl":"10.1016/j.solmat.2025.113532","url":null,"abstract":"<div><div>Thermochemical energy storage technology exhibits great potential due to its high efficiency, low-cost and widespread availability. Efficient solar energy storage necessitates both a high energy storage performance and optimal direct solar absorption for enhanced performance. However, the density decay due to sintering and weak solar absorption because of light color of CaO-based heat carriers significantly restrict the application of CaL-based energy storage technology. This study aims to synthesize CaO-based heat carriers possessing both high energy storage density and strong solar absorption. Fe/Mn ions and Zr-based supports were individually and simultaneously doped to enhance the cyclic energy storage performance of CaCO₃/CaO materials more effectively. The Fe/Mn/Zr triple-doped material (Ca100Fe12Mn6Zr10) exhibited a substantial enhancement in average spectral absorption (reaching 51.42 %), an increase of nearly 5.5 times compared to pure CaO (9.33 %). This enhancement was attributed to the formation of dark Ca₂Fe₂O₅, Ca₂MnO₄, and Ca₄Mn₃O₁₀ compounds. Additionally, the formation of CaZrO₃, Ca₂MnO₄, and Ca₄Mn₃O₁₀, characterized by notable sintering resistance, served as a thermal stabilizer to enhance the cyclic stability. Consequently, the triple-doped CaO-based heat carrier achieved a high density of 1549.04 kJ/kg in the 10th cycle, retaining 97.24 % of its initial value.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113532"},"PeriodicalIF":6.3,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454333","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}

{"title":"Facile synthesis of Al@Al2O3 core-shell microcapsule by ultrasonic for high-temperature thermal energy storage","authors":"Yu Chen ,&nbsp;Zhenhua Gu ,&nbsp;Xun Ma ,&nbsp;Jing Chen ,&nbsp;Liangnuo Yang ,&nbsp;Ruizi A ,&nbsp;Ming Li","doi":"10.1016/j.solmat.2025.113530","DOIUrl":"10.1016/j.solmat.2025.113530","url":null,"abstract":"<div><div>Developing heat storage materials capable of operating above 600 °C is a significant challenge in solar thermal power systems. In this study, a low-temperature ultrasonic-magnetic activation approach was employed to fabricate a phase change material for high-temperature thermal energy storage with an Al@Al₂O₃ core-shell structure, utilizing the unique cavitation effect of ultrasonic waves. The specific surface area and pore volume of samples prepared via ultrasound-assisted hydrothermal synthesis increased by approximately 87.67 % and 91.3 %, respectively. In addition, the prepared Al@Al₂O₃ microcapsules exhibited a melting point of approximately 662 °C and a latent heat of phase transition of 269.13 J/g. After 100 melting-freezing cycles, the microcapsules demonstrated good thermal cycling stability, with a retained latent heat of 237.11 J/g. These findings suggest that the newly developed Al@Al₂O₃ microcapsules can be utilized for high-temperature heat storage due to their stable performance and ease of fabrication.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113530"},"PeriodicalIF":6.3,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445608","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}

{"title":"Tetraethylammonium chloride as a novel eutectic partner for sodium acetate trihydrate-tailored phase change materials for efficient solar heat pump systems","authors":"Yingzheng Yuan ,&nbsp;Xi Man ,&nbsp;Hao Lu ,&nbsp;Ziye Ling","doi":"10.1016/j.solmat.2025.113507","DOIUrl":"10.1016/j.solmat.2025.113507","url":null,"abstract":"<div><div>Sodium acetate trihydrate (SAT) is a promising phase change material for thermal energy storage, but its application is limited by its phase change temperature, subcooling, phase separation, and leakage. In this study, we successfully addressed these challenges by forming a binary eutectic with tetraethylammonium chloride (TEAC) and incorporating additives and a support material. The addition of 15 wt% TEAC reduced the phase change temperature to 49.2 °C while maintaining a high latent heat of 184.9 J/g. Further improvements were achieved by adding 1 wt% sodium tetraborate decahydrate (STD) as a nucleating agent to reduce subcooling and 1 wt% carboxymethyl cellulose (CMC) as a thickener to prevent phase separation. The issue of leakage was resolved by adsorbing the eutectic salt onto silicon dioxide (SiO₂), resulting in a shape-stable composite with minimal leakage. The optimized SAT-TEAC/SiO₂ composite phase change material demonstrated excellent thermal stability and retained its phase change properties even after 1000 thermal cycles. This new composite material shows great promise for thermal energy storage and solar heat pump systems due to its enhanced performance and stability.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113507"},"PeriodicalIF":6.3,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444960","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}

{"title":"Flexible MXene@PVP/PEG phase change composite with hydrogen bond assembly for advanced energy storage and thermal management","authors":"Qiuling Chen,&nbsp;Xiaonan Huang,&nbsp;Yuanzhou Chen,&nbsp;Xiang Chen,&nbsp;Zhifeng Hao,&nbsp;Jiajun Liang,&nbsp;Jian Yu,&nbsp;Guizhen Tan","doi":"10.1016/j.solmat.2025.113509","DOIUrl":"10.1016/j.solmat.2025.113509","url":null,"abstract":"<div><div>In response to the growing need for advanced thermal management in electronics, energy storage devices, and wearable technology, there has been substantial focus on developing multifunctional phase change materials (PCMs) with capabilities for heat storage, shape stability, and photothermal conversion. However, the rigidity and susceptibility to leakage of PCMs present considerable obstacles to their practical applications. To address these issues, a novel and flexible MXene@PVP/PEG phase change composite membrane (FPCM) are successfully fabricated, which exhibits advanced solar thermal conversion and energy storage capabilities. The FPCM was fabricated through a straightforward mixing process, followed by a vacuum-assisted hydrogen bonding self-assembly method (VASA). The two-dimensional photothermal conversion material MXene, integrated with polyvinylpyrrolidone (PVP) through abundant hydrogen bonds, assembles to form a highly oriented specific interlayer framework. This structure effectively addresses the leakage issue that arises during the phase transition of polyethylene glycol (PEG), which serves as a heat storage medium, while ensuring that its thermal conductivity and photothermal conversion efficiency remain optimal. The optimized FPCMs, comprising 16 wt% MXene and 4 wt% PVP, demonstrated remarkable flexibility, retaining their structural integrity after 100 bending cycles. Moreover, the MXene@PVP/PEG exhibited remarkable thermal reliability, retaining over 98 % of their enthalpy after 100 heating-cooling cycles, with a melting enthalpy of 131.6 J/g. These flexible FPCMs, which combine high latent thermal energy storage and temperature regulation properties, show considerable promise for energy storage and thermal management in electronic devices.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113509"},"PeriodicalIF":6.3,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444961","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}