Solar Energy Materials and Solar Cells最新文献_第6页

Defect regulation enhances the efficiency of Cu2ZnSnS4 solar cells by solution engineering

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2025-03-04 DOI: 10.1016/j.solmat.2025.113555

Long Zou , Hai Ma , Qiang Zhu , Bin Xu , Hongru Wang , Lin Sun , Ye Chen

{"title":"Defect regulation enhances the efficiency of Cu2ZnSnS4 solar cells by solution engineering","authors":"Long Zou , Hai Ma , Qiang Zhu , Bin Xu , Hongru Wang , Lin Sun , Ye Chen","doi":"10.1016/j.solmat.2025.113555","DOIUrl":"10.1016/j.solmat.2025.113555","url":null,"abstract":"<div><div>The preparation of Cu<sub>2</sub>ZnSnS<sub>4</sub> (CZTS) through the solution method demonstrates significant application potential due to its high efficiency, simplicity and low cost. However, CZTS still faces several issues, including poor crystallinity of the absorber and complex intrinsic harmful defects, which severely limit the efficiency of the cell. We have developed a simple and effective method for growing large-grain CZTS thin films and regulating defects. By reducing the concentration of the precursor solution, the crystallinity of the absorber is significantly enhanced, thereby avoiding the occurrence of voids and fine grains, and greatly improving the Fill Factor of the solar cell. Due to the improved crystallinity of the absorber and the shallower energy level of the Cu<sub>Zn</sub> defect, the carrier density has significantly increased. Furthermore, the reduction in the density of deep-level defects also decreases non-radiative recombination. Through this method, the photovoltaic performance of CZTS solar cells without extra post-annealing has been significantly improved, achieving a cell efficiency of 7.6 %.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113555"},"PeriodicalIF":6.3,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534904","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

Preface: SiliconPV 2024, the 14th International Conference on Crystalline Silicon Photovoltaics

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2025-03-04 DOI: 10.1016/j.solmat.2025.113553

Sébastien Dubois

引用次数: 0

High-performance PMMA based solvent-free solid transparent polymer electrolyte modified by succinonitrile for electrochromic devices

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2025-03-03 DOI: 10.1016/j.solmat.2025.113538

Tingting Chen , Fangyuan Zhao , Likun Wang , Sainan Ma , Guohua Shi , Qiying Liu , Yong Liu , Gaorong Han

{"title":"High-performance PMMA based solvent-free solid transparent polymer electrolyte modified by succinonitrile for electrochromic devices","authors":"Tingting Chen , Fangyuan Zhao , Likun Wang , Sainan Ma , Guohua Shi , Qiying Liu , Yong Liu , Gaorong Han","doi":"10.1016/j.solmat.2025.113538","DOIUrl":"10.1016/j.solmat.2025.113538","url":null,"abstract":"<div><div>To address the issues of the gel polymer electrolytes caused by solvents, like Propylene Carbonate (pc) and Ethylene Carbonate (ec), regarding cycling stability and safety, we prepared solvent-free PMMA-based solid polymer electrolytes using succinonitrile as a plasticizer (SN-PMMA) through the blade coating method. The mechanism of SN additives on dissociation of LiClO<sub>4</sub> and electrochemical properties was characterized using Fourier transform infrared spectroscopy, electrochemical impedance spectroscopy, and other structural investigation methods. The results indicated that SN is distributed uniformly in the PMMA matrix with high additive concentrations, and the nitrile group, which possesses strong polarity, effectively promoted the dissociation of lithium salt. The solvent-free SN-PMMA exhibits excellent ionic conductivity of 0.58 mS cm<sup>-1</sup> and good thermal stability. The solid Electrochromic devices (ECDs) prepared with SN-PMMA and WO<sub>3</sub> via thermal laminating process maintain 90.8 % modulation amplitude after 500 cycles, as well as good electrochromic performance, where the optical modulation amplitude is 62.1 % at λ = 633 nm, the coloring efficiency is 53.77 cm<sup>2</sup> C<sup>-1</sup>, and the response time is 23.8 s/38.1 s for bleaching/coloration, respectively. These findings confirm the feasibility of using SN as a substitute for traditional solvents and provide a new pathway for developing solid-state polymer electrolytes with enhanced safety and superior electrochemical performance.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113538"},"PeriodicalIF":6.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534972","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

Optimization of different composite sorption materials and their thickness for enhanced PV cooling performance: A multiphysics simulation approach

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2025-03-03 DOI: 10.1016/j.solmat.2025.113554

Moataz M. Abdel-Aziz, Asmaa A. ElBahloul

{"title":"Optimization of different composite sorption materials and their thickness for enhanced PV cooling performance: A multiphysics simulation approach","authors":"Moataz M. Abdel-Aziz, Asmaa A. ElBahloul","doi":"10.1016/j.solmat.2025.113554","DOIUrl":"10.1016/j.solmat.2025.113554","url":null,"abstract":"<div><div>The integration of sorption materials into photovoltaic thermal (PVT) systems has gained attention as an effective strategy for enhancing performance. Sorption materials play a multifunctional role by providing thermal regulation, enhancing heat transfer, and reducing PV module operating temperatures. This study presents a novel contribution in two key areas: the selection and evaluation of composite sorption materials—Silica Gel-CaCl<sub>2</sub>, Zeolite X13-CaCl<sub>2</sub>, and Hydrogel PAM-LiCl—as an advanced cooling solution for PVT systems, and the use of a comprehensive numerical approach via COMSOL Multiphysics to simulate their thermal behavior under different material thicknesses (1, 2, and 3 cm). By combining innovative material selection with an advanced computational framework, this work bridges a critical gap in the literature, offering a systematic evaluation of how composite sorption materials can optimize PVT performance and improve overall energy efficiency. The results show that Silica Gel-CaCl<sub>2</sub> with 3 cm thickness can achieve the most significant temperature reduction, lowering the PV temperature from 69.33 °C to 38.96 °C at noon, while Zeolite X13-CaCl<sub>2</sub> reduced it to 53.80 °C. These materials also positively influenced PV efficiency, with the highest overall thermal efficiency recorded for 3 cm thickness—13.70 % for Zeolite X13-CaCl<sub>2</sub> and 13.95 % for Silica Gel-CaCl<sub>2</sub>. The study emphasizes the importance of selecting the optimal thickness, with thicker layers (2–3 cm) proving to be more effective during midday, when solar radiation is at its peak. Additionally, thinner layers (1 cm) performed better in the early morning hours. The findings suggest that optimizing Silica Gel-CaCl<sub>2</sub> with 3 cm thickness can provide an effective solution to enhance the performance of PVT systems, particularly in areas with high solar intensity.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113554"},"PeriodicalIF":6.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534902","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

Improving buried interface contact by molecular bridging effect for inverted perovskite solar cells

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2025-03-03 DOI: 10.1016/j.solmat.2025.113548

Shennan Chen , Chu Zhang , Yongchun Ye , Chunying Ma , ChunLong Wang , Qingxue Wang , Yue Zhao , Mingjun Nie , Lei Shi , Yonggang Yu , Liguo Gao , Miaogen Chen , Yusran Sulaiman , Tingli Ma

{"title":"Improving buried interface contact by molecular bridging effect for inverted perovskite solar cells","authors":"Shennan Chen , Chu Zhang , Yongchun Ye , Chunying Ma , ChunLong Wang , Qingxue Wang , Yue Zhao , Mingjun Nie , Lei Shi , Yonggang Yu , Liguo Gao , Miaogen Chen , Yusran Sulaiman , Tingli Ma","doi":"10.1016/j.solmat.2025.113548","DOIUrl":"10.1016/j.solmat.2025.113548","url":null,"abstract":"<div><div>The commercial self-assembled monolayer (SAMs) has been shown to significantly enhance the power conversion efficiency (PCE) of inverted (p-i-n) perovskite solar cells (PSCs) when employed as a double hole transport layer (HTL) on nickel oxide (NiO<sub>x</sub>). Despite these improvements, the inherent hydrophobicity of the SAMs results in suboptimal crystallization and the formation of micro-scale voids at the buried interface of the perovskite layer, which in turn leads to significant interface defects and serious nonradiative recombination. In this work, we introduce a molecular bridging layer composed of Diethyl (Phthalimidomethyl) phosphonate (DP), characterized by its carbonyl groups and phosphoryl bonds, to be deposited onto the surface of Me-4PACz. This bridging layer demonstrates a remarkable ability to coordinate with lead ions, providing a robust binding affinity that facilitate excellent adhesion to the substrate surface. The synergistic interaction of the two functional groups within the DP layer effectively mitigates bulk-phase defects and suppresses nonradiative recombination at the buried interface of the perovskite. As a result, PSCs incorporating the DP layer achieved a champion PCE of 23.26 % on an active area of 0.09 cm<sup>2</sup>. Additionally, The unencapsulated PSC maintains above 50 % of its initial PCE in the air with a relative humidity (RH) of 50–60 % for 1000 h. This work highlights the potential of integrating bridging layers in optimizing the performance and stability of PSCs.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113548"},"PeriodicalIF":6.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529575","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

On- and off-design optimization for a solar-powered supercritical CO2 cycle based on an improved integrative model with a one-dimensional prime heat exchanger submodel

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2025-03-03 DOI: 10.1016/j.solmat.2025.113539

Xiang Wan , Kun Wang , Jia-Kun Liu , Zhong-Hao Rao , Chun-Hua Min

{"title":"On- and off-design optimization for a solar-powered supercritical CO2 cycle based on an improved integrative model with a one-dimensional prime heat exchanger submodel","authors":"Xiang Wan , Kun Wang , Jia-Kun Liu , Zhong-Hao Rao , Chun-Hua Min","doi":"10.1016/j.solmat.2025.113539","DOIUrl":"10.1016/j.solmat.2025.113539","url":null,"abstract":"<div><div>The integration of the solar power tower system with a supercritical CO<sub>2</sub> (S-CO<sub>2</sub>) Brayton power cycle is a promising approach for the efficient utilization of solar energy. The prime heat exchanger acts as a bridge to exchange the energy and mass flow between the solar components and the power cycle, whose on-design and off-design performance are crucial for system optimization and analysis. Therefore, the present study incorporates a one-dimensional primary heat exchanger model into the solar power tower model, whose geometric parameters are carefully considered to accurately capture its heat transfer performance and flow resistance. The optimization and analysis are conducted for solar power systems to reveal the optimal geometry and operating parameters for both on-design and off-design conditions. The optimization results indicate that the optimal designs for primary heat exchangers feature compactness, long and thin type, low baffle cut, and high tube side flow velocity. For on-design conditions, the heat-capacity flow rate of molten salt should be designed higher than CO<sub>2</sub> in the prime heat exchanger, maintaining the hot end approach temperature higher than the cold end. This improves the operating temperature and efficiency of the power cycle significantly, at the expense of deteriorating receiver efficiency slightly. For low power load scenarios, the heat-capacity flow rate of molten salt should be lower than CO<sub>2</sub> to increase the hot end approach temperature of the prime heat exchanger. This reduces the operating temperature of CO<sub>2</sub>, avoiding a considerable reduction in the mass flow rate of CO<sub>2</sub>, benefiting the turbomachinery and power cycle performances.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113539"},"PeriodicalIF":6.3,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534995","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

Flexible biomass-based phase change materials: L-N-Ti for environmentally friendly thermal management

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2025-03-02 DOI: 10.1016/j.solmat.2025.113552

Sixing Zhang , Guangyao Zhao , Zhen Li , Jianfeng Hu , Zhehui Zhao , Jiakang Yao , Na Cheng , Zhengguo Zhang

{"title":"Flexible biomass-based phase change materials: L-N-Ti for environmentally friendly thermal management","authors":"Sixing Zhang , Guangyao Zhao , Zhen Li , Jianfeng Hu , Zhehui Zhao , Jiakang Yao , Na Cheng , Zhengguo Zhang","doi":"10.1016/j.solmat.2025.113552","DOIUrl":"10.1016/j.solmat.2025.113552","url":null,"abstract":"<div><div>Traditional phase change materials (PCMs) offer broad application potential but face challenges such as environmental unfriendliness, high rigidity and poor heat transfer performance, resulting in low utilization efficiency. In this study, using biomass loofah sponge (LS) as the main framework and natural rubber latex (NRL) as the flexible modifier, the biomass-based PCMs (L-N) were successfully synthesized after encapsulating lauric acid (LA). The addition of nano-TiO<sub>2</sub> further enhanced thermal conductivity, ultimately leading to the development of flexible composite PCMs, L-N-Ti. In-depth characterizations revealed that the introduction of NRL significantly improved the system's strength and toughness, with tensile strength peaking at 1.161 MPa at 19.2 % NRL content, while maximum elongation at break reached 38.65 % at 26.3 % NRL. The incorporation of 7.4 wt% TiO<sub>2</sub> significantly boosted thermal conductivity to 0.57 W/(m·K), a 185 % increase over the unmodified material. Simultaneously, the energy storage efficiency (E<sub>m</sub>) of L-N-Ti consistently exceeded 89.89 %, with only a 9.34 % loss in latent heat of fusion after 100 thermal cycles, indicating robust thermal stability. The successful advancement of L-N-Ti not only addresses the mechanical constraints inherent but also offers a sustainable biomass-based solution for effective thermal management within the 20°C–60 °C range.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113552"},"PeriodicalIF":6.3,"publicationDate":"2025-03-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527151","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

Comprehensive analysis of forced convection heat transfer enhanced by metal foam with pore density gradient structure

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2025-03-01 DOI: 10.1016/j.solmat.2025.113549

Yifan Wang, Xinglong Ma, Zhiwei Ouyang, Shen Liang

{"title":"Comprehensive analysis of forced convection heat transfer enhanced by metal foam with pore density gradient structure","authors":"Yifan Wang, Xinglong Ma, Zhiwei Ouyang, Shen Liang","doi":"10.1016/j.solmat.2025.113549","DOIUrl":"10.1016/j.solmat.2025.113549","url":null,"abstract":"<div><div>Metal foam, characterized by its large specific surface area, remarkable thermal and mechanical properties, is often used for heat dissipation in solar panels and solar energy storage systems. To address the pressure drop associated with the application of metal foam, eight foam metal composite structures with different pore gradient structures were developed. This study used computational fluid dynamics to analyze the heat transfer performance of structures with identical porosity but varying gradients. Results showed that gradient structures significantly reduce flow resistance. When high porosity metal foam occupies 20 %–80 % of the heat exchange section, the average pressure drop decreases by 17.2 %, 13.0 %, 8.7 %, and 4.7 % compared to uniform high porosity metal foam. The optimal configuration is 20 % low porosity and 80 % high porosity, with airflow performing better in the negative gradient direction. Practically, combining 10PPI and 20PPI allows for choosing either 20 % low porosity with 80 % high porosity or 40 % low porosity with 60 % high porosity. This study may offer a novel approach for heat exchange in solar energy applications.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113549"},"PeriodicalIF":6.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143520734","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

Improving the stability of thin polycrystalline silicon passivated contacts using titanium dioxide interlayers

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2025-03-01 DOI: 10.1016/j.solmat.2025.113523

Di Yan , Jesus Ibarra Michel , Sieu Pheng Phang , Rabin Basnet , Yida Pan , Brett C. Johnson , Jimmy Sun , Yumin Li , Heping Shen , Jie Yang , Xinyu Zhang , Daniel Macdonald , Peiting Zheng , James Bullock

{"title":"Improving the stability of thin polycrystalline silicon passivated contacts using titanium dioxide interlayers","authors":"Di Yan , Jesus Ibarra Michel , Sieu Pheng Phang , Rabin Basnet , Yida Pan , Brett C. Johnson , Jimmy Sun , Yumin Li , Heping Shen , Jie Yang , Xinyu Zhang , Daniel Macdonald , Peiting Zheng , James Bullock","doi":"10.1016/j.solmat.2025.113523","DOIUrl":"10.1016/j.solmat.2025.113523","url":null,"abstract":"<div><div>Polycrystalline silicon (poly-Si) passivated contacts are one of the key technologies in the push towards silicon's theoretical efficiency limit of 29.4 %. However, degradation of silicon surface passivation during metallisation remains an issue, necessitating thick poly-Si layers which negatively impact transparency and deposition time. In this work, we introduce titanium dioxide (TiO<sub>2</sub>) based protective interlayers between the thin poly-Si layer (<40 nm) and metal electrodes. Thicker TiO<sub>2</sub> interlayers are generally found to provide better protection, however, even thin TiO<sub>2</sub> interlayers (∼7 nm) provide significant thermal stability enhancement over unprotected poly-Si films. Greater thermal stability is afforded when utilising a higher temperature TiO<sub>2</sub> deposition step (250 °C), or a pre-metallisation anneal step (450 °C). These improvements in surface passivation thermal stability come at the expense of higher contact resistivity, ρ<sub>c</sub>, however, the final ρ<sub>c</sub> values are still acceptable for full area contacts. The best TiO<sub>2</sub> films were deposited at 250 °C using titanium tetraisopropoxide (TTIP) and Tetrakis (dimethylamido) titanium (TDMAT) precursors, which permitted the preservation of implied open circuit voltages, iV<sub>oc</sub> > 700 mV, and ρ<sub>c</sub> values < 47 mΩ-cm<sup>2</sup> after post-metallisation annealing at ≥ 500 °C. The protective effects of this interlayer structure may allow the thinning of poly-Si layers, reducing their parasitic absorption, and permitting their usage on both sides of silicon solar cells.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113523"},"PeriodicalIF":6.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527150","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

Epi-grown broadband reflector for InAs-based thermophotovoltaics

IF 6.3 2区材料科学

Solar Energy Materials and Solar Cells Pub Date : 2025-03-01 DOI: 10.1016/j.solmat.2025.113544

Gavin P. Forcade , Mathieu de Lafontaine , Mathieu Giroux , Man Chun Tam , Zbig Wasilewski , Jacob J. Krich , Raphael St-Gelais , Karin Hinzer

{"title":"Epi-grown broadband reflector for InAs-based thermophotovoltaics","authors":"Gavin P. Forcade , Mathieu de Lafontaine , Mathieu Giroux , Man Chun Tam , Zbig Wasilewski , Jacob J. Krich , Raphael St-Gelais , Karin Hinzer","doi":"10.1016/j.solmat.2025.113544","DOIUrl":"10.1016/j.solmat.2025.113544","url":null,"abstract":"<div><div>Reflecting sub-bandgap photons is crucial for maximizing the efficiency of thermophotovoltaic devices. However, existing metal-deposited reflectors rely on back-side metallization, which cannot be grown epitaxially, necessitating additional processing steps. In this study, we fabricate InAs-based thermophotovoltaic devices featuring a straightforward, epitaxially grown sub-bandgap reflector composed of a single layer of n-doped InAs at a doping concentration of 2.4 × 10<sup>19</sup> cm<sup>−3</sup>. This high doping produces long-wavelength metallic-like reflection, and our devices demonstrate high sub-bandgap reflectivity from 3.5 to 17 μm, achieving up to 93 % reflectivity compared to 30–40 % for designs without the reflector. Using a calibrated optical model, we predict that the sub-bandgap reflectivity of this layer enhances spectral efficiency from 38 % to 79 % under a 600 K normally incident blackbody spectrum. This improvement rivals that of a standard gold back reflector, which achieves a spectral efficiency of 94 %. Additionally, our predictive electrical model, calibrated with fabricated devices, indicates that the reflective layer does not adversely affect the electrical properties of the thermophotovoltaic devices. This sub-bandgap reflector can be integrated into existing InAs-based thermophotovoltaic fabrication processes, eliminating complex substrate removal steps required for traditional gold reflectors.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"285 ","pages":"Article 113544"},"PeriodicalIF":6.3,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527149","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