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Effect of Al concentration on the phase composition of typical impurities during industrial silicon smelting 铝浓度对工业硅冶炼中典型杂质物相组成的影响
IF 6.3 2区 材料科学
Solar Energy Materials and Solar Cells Pub Date : 2025-09-23 DOI: 10.1016/j.solmat.2025.113976
Yaopan Hu , Zhengjie Chen , Wenhui Ma , Jijun Wu , Junyu Qu , Xiaowei Gan
{"title":"Effect of Al concentration on the phase composition of typical impurities during industrial silicon smelting","authors":"Yaopan Hu ,&nbsp;Zhengjie Chen ,&nbsp;Wenhui Ma ,&nbsp;Jijun Wu ,&nbsp;Junyu Qu ,&nbsp;Xiaowei Gan","doi":"10.1016/j.solmat.2025.113976","DOIUrl":"10.1016/j.solmat.2025.113976","url":null,"abstract":"<div><div>During the industrial silicon refining process, impurities can affect the selectivity and activity of organic silicon monomer synthesis. This study utilized the simplified molecular interaction volume model (MIVM) alongside actual production data and samples to investigate the effects of different aluminum concentrations on typical impurity phases in industrial silicon. et al. concentrations of 1500–1600 ppmw, the Si<sub>7</sub>Al<sub>8</sub>Fe<sub>5</sub> phase emerges. As the Al concentration increases to 1700 ppmw, the Si<sub>2</sub>Al<sub>3</sub>Fe phase forms. The FeSi<sub>2</sub>, Si<sub>8</sub>Al<sub>6</sub>Fe<sub>4</sub>Ca, and FeTiSi<sub>2</sub> phases are consistently present in industrial silicon. MIVM predictions indicate that the activities of Fe, Ti, and Ca increase with increasing Al concentration, consistent with the actual production trend. However, production data suggest that this correlation is limited under certain conditions. Moreover, MIVM is used to predict the interactions among impurities in industrial silicon. The effects of Al concentration on typical impurity phases in industrial silicon are elucidated using MIVM combined with actual production data. Proper control of Al concentration facilitates the efficient synthesis of organosilicon monomers, increases their yield, and reduces energy consumption. These findings provide a theoretical and technical basis for controlling impurities in organosilicon monomer synthesis.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"295 ","pages":"Article 113976"},"PeriodicalIF":6.3,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119412","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 Sb2Se3 thin-film solar cell performance via stepwise optimization of a TiO2/CdS-coupled buffer layer 通过逐步优化TiO2/ cds耦合缓冲层提高Sb2Se3薄膜太阳能电池性能
IF 6.3 2区 材料科学
Solar Energy Materials and Solar Cells Pub Date : 2025-09-23 DOI: 10.1016/j.solmat.2025.113969
Parag R. Patil , Pravin S. Pawar , Neha Bisht , Rahul K. Yadav , Vishesh Manjunath , Indu Sharma , Yong Tae Kim , Eunjin Jo , Anil V. Ghule , Jaeyeong Heo
{"title":"Improving Sb2Se3 thin-film solar cell performance via stepwise optimization of a TiO2/CdS-coupled buffer layer","authors":"Parag R. Patil ,&nbsp;Pravin S. Pawar ,&nbsp;Neha Bisht ,&nbsp;Rahul K. Yadav ,&nbsp;Vishesh Manjunath ,&nbsp;Indu Sharma ,&nbsp;Yong Tae Kim ,&nbsp;Eunjin Jo ,&nbsp;Anil V. Ghule ,&nbsp;Jaeyeong Heo","doi":"10.1016/j.solmat.2025.113969","DOIUrl":"10.1016/j.solmat.2025.113969","url":null,"abstract":"<div><div>Currently, most of the high-performance Sb<sub>2</sub>Se<sub>3</sub> thin film solar cells (TFSCs) are coupled with a cadmium sulfide (CdS) buffer layer, which has proven effective in enhancing device performance. However, lower bandgap (2.4 eV), presence of shunt paths, and high surface roughness of CdS contribute to optical losses, recombination losses, and carrier extraction inefficiencies in TFSCs. To mitigate these problems, this study introduces an additional cadmium chloride (CdCl<sub>2</sub>) treatment step to modify pristine CdS films deposited via standard chemical bath deposition (CBD). Furthermore, a titanium dioxide (TiO<sub>2</sub>) intermediate layer is introduced beneath the CdCl<sub>2</sub>-treated CdS buffer layer, using a simple spin-coating technique, to form a TiO<sub>2</sub>/CdS-coupled buffer layer. The hydrothermal growth of the Sb<sub>2</sub>Se<sub>3</sub> light absorber over these buffer layers was optimized to fabricate efficient FTO/TiO<sub>2</sub>/CdS/Sb<sub>2</sub>Se<sub>3</sub>/Spiro-OMeTAD/Au structured solar cell devices. The fabricated devices with the pristine CdS, CdCl<sub>2</sub>-treated CdS, and TiO<sub>2</sub>/CdS (CdCl<sub>2</sub>-treated) are denoted as BL1, BL2, and BL3, respectively. The optimized Sb<sub>2</sub>Se<sub>3</sub> TFSC with BL3 reaches a power conversion efficiency (PCE) of 6.19 % which is significantly higher than the device with BL1 (PCE = ∼5.10 %). Furthermore, a surface topography conducted on buffer layers revealed the reduced roughness after CdCl<sub>2</sub> treatment and TiO<sub>2</sub> intermediate layer improved the interface quality. Additionally, the effect of the Sb<sub>2</sub>Se<sub>3</sub> absorber thickness on the device performance was further investigated using the SCAPS-1D software tool. The champion devices with BL1 and BL2 retained ∼90 % of initial efficiency, meanwhile, the PCE of the device with BL3 improved when stored vacuum packed for 4 months.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"295 ","pages":"Article 113969"},"PeriodicalIF":6.3,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145119322","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
Ultrasonic-stirring-enhanced leaching and recovery of silver from retired photovoltaic cells using a green CuCl2-ChCl solvent system 超声波-搅拌强化绿色CuCl2-ChCl溶剂体系浸出和回收退役光伏电池中的银
IF 6.3 2区 材料科学
Solar Energy Materials and Solar Cells Pub Date : 2025-09-20 DOI: 10.1016/j.solmat.2025.113975
Qunzhi Wang , Jijun Wu , Wenhui Ma , Zhengjie Chen , Fengshuo Xi
{"title":"Ultrasonic-stirring-enhanced leaching and recovery of silver from retired photovoltaic cells using a green CuCl2-ChCl solvent system","authors":"Qunzhi Wang ,&nbsp;Jijun Wu ,&nbsp;Wenhui Ma ,&nbsp;Zhengjie Chen ,&nbsp;Fengshuo Xi","doi":"10.1016/j.solmat.2025.113975","DOIUrl":"10.1016/j.solmat.2025.113975","url":null,"abstract":"<div><div>With the increasing number of retired photovoltaic (PV) modules, their efficient recycling has emerged as a vital research focus. In this study, a green CuCl<sub>2</sub>-ChCl solvent system was developed to recover silver (Ag) from retired photovoltaic modules. Ultrasonic intensification combined with mechanical stirring resulted in a high Ag leaching rate of 98.81 %. Kinetic analysis revealed that the Ag leaching process in the solvent system was controlled by a chemical reaction mechanism, with an apparent activation energy of 42.19 kJ/mol. An experimental model was established and optimized using response surface methodology to determine the optimal process parameters. The morphology and elemental distribution of samples before and after leaching were analyzed via scanning electron microscopy and energy-dispersive X-ray spectroscopy. AgCl was formed using HCl and NaCl as chlorine sources and then reduced to metallic Ag by ascorbic acid. The reduction process yielded Ag powder with a recovery rate of 98.57 %. This study provides a sustainable and efficient approach for recycling Ag from retired PV modules.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"295 ","pages":"Article 113975"},"PeriodicalIF":6.3,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107183","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
Novel quinoline-pyridine type viologens for near-infrared electrochromic devices 用于近红外电致变色器件的新型喹啉-吡啶型荧光剂
IF 6.3 2区 材料科学
Solar Energy Materials and Solar Cells Pub Date : 2025-09-20 DOI: 10.1016/j.solmat.2025.113972
Yiying Han, Jiuzhou Cui, Xingxing Song, Xuan Wang, Haiwen Shi, Jian Liu
{"title":"Novel quinoline-pyridine type viologens for near-infrared electrochromic devices","authors":"Yiying Han,&nbsp;Jiuzhou Cui,&nbsp;Xingxing Song,&nbsp;Xuan Wang,&nbsp;Haiwen Shi,&nbsp;Jian Liu","doi":"10.1016/j.solmat.2025.113972","DOIUrl":"10.1016/j.solmat.2025.113972","url":null,"abstract":"<div><div>In this work, four novel viologen derivates (<strong>PTV</strong>, <strong>PTMV</strong>, <strong>TPTMV</strong> and <strong>FTPTMV</strong>) consisted of the similar backbone with one pyridine unit and one quinoline group were developed for all-in-one electrochromic devices. Different from the conventional viologens, four viologen derivates in this work showed stable transmittance and significant color changes throughout the electrochromic process. Under the stimulation of external voltage, the four derivatives can show changes from colorless to dark yellow-green. Specially, <strong>PTMV</strong>, <strong>TPTMV</strong> and <strong>FTPTMV</strong> with bulky and rigid moiety (norcamphor or camphor) demonstrated efficient near-infrared (NIR) electrochromic performance around 890 nm, involving high optical contrast over 90 %, high coloration efficiency over 150 cm<sup>2</sup> C<sup>−1</sup> and excellent cycling stability (remaining over 90 % after 2000 switching cycles). In addition, it also demonstrated outstanding performance in testing large-area devices. This work provided an effective strategy to molecular design of viologen derivates for NIR electrochromic devices with potential application in smart windows.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"295 ","pages":"Article 113972"},"PeriodicalIF":6.3,"publicationDate":"2025-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107181","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
Shape-driven optimization strategy for efficient and stable lead-free all-perovskite tandem solar cells 高效稳定的全钙钛矿串联太阳能电池的形状驱动优化策略
IF 6.3 2区 材料科学
Solar Energy Materials and Solar Cells Pub Date : 2025-09-19 DOI: 10.1016/j.solmat.2025.113971
Wenbin Lin , Yu Cao , Zhicheng Ke , Ali Hassan
{"title":"Shape-driven optimization strategy for efficient and stable lead-free all-perovskite tandem solar cells","authors":"Wenbin Lin ,&nbsp;Yu Cao ,&nbsp;Zhicheng Ke ,&nbsp;Ali Hassan","doi":"10.1016/j.solmat.2025.113971","DOIUrl":"10.1016/j.solmat.2025.113971","url":null,"abstract":"<div><div>Due to environmental concerns arising from the toxicity of lead-based perovskite solar cells (PSCs), developing efficient and stable lead-free perovskite solar cells has become a research hotspot. However, lead-free alternatives continue to struggle with high photovoltaic performance. In addition, despite the perovskite grain shape and structure plays a significant role in photon absorption, no significant dedicated research has been conducted to explore shape-driven photovoltaic properties of PSCs, so far. To fill this gap, we utilized COMSOL Multiphysics software to investigate the perovskite grain shape-modulated photovoltaic optimization aiming to systematically enhance the overall performance of lead-free all-perovskite tandem solar cells (APTSCs). Our findings proposed that perovskite grain with cylindrical shape exhibit excellent photovoltaic performance, as the single-junction lead-free devices with narrow and wide bandgap exhibited optimal power conversion efficiency (PCE) of 31.67 % and 21.15 %, respectively. Furthermore, we successfully constructed 2T lead-free perovskite tandem solar cells by combining the optimized single-junctions and PCE value as high as 33.28 % was achieved. These results not only demonstrate the enormous potential of lead-free perovskite materials but also validate that perovskite grain shape is a crucial parameter for light trapping in solar absorber materials which has the potential to effectively overcome the current material's limitations and can boost the device efficiency of lead-free perovskite tandem devices.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"295 ","pages":"Article 113971"},"PeriodicalIF":6.3,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107179","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
Durability evaluation of structural colored PV minimodule by stress tests for BIPV applications BIPV应用中结构彩色PV微型组件的应力测试耐久性评价
IF 6.3 2区 材料科学
Solar Energy Materials and Solar Cells Pub Date : 2025-09-19 DOI: 10.1016/j.solmat.2025.113968
Zhihao Xu , Takuya Matsui , Hitoshi Sai
{"title":"Durability evaluation of structural colored PV minimodule by stress tests for BIPV applications","authors":"Zhihao Xu ,&nbsp;Takuya Matsui ,&nbsp;Hitoshi Sai","doi":"10.1016/j.solmat.2025.113968","DOIUrl":"10.1016/j.solmat.2025.113968","url":null,"abstract":"<div><div>Building-integrated photovoltaics (BIPV) offers a promising approach for incorporating solar modules directly into architectural structures. To visually harmonize with surrounding environments, structural coloring using dielectric multilayers is often applied to PV modules. For practical implementation, maintaining both visual and electrical stability of colored PV modules is essential. In this study, we evaluated the long-term durability of colored PV minimodules, featuring SiO<sub>2</sub>/TiO<sub>2</sub> dielectric multilayers coated on the outer surface of the cover glass, through accelerated stress tests in accordance with IEC61215 and IEC61646 standards, including ultraviolet exposure, damp heat (DH) and thermal cycling. The results demonstrated that the structural color layers exhibit sufficient resistance to environmental stress and did not compromise the overall durability of the PV minimodules. However, a slight expansion (approximately 2–3 %) of the SiO<sub>2</sub> layers was observed during the initial DH test, causing minor color variations that were nearly imperceptible. To suppress this color instability a 40-h DH pre-stabilization treatment was applied. The pre-stabilized SiO<sub>2</sub> layers showed minimal thickness variation (within ±1 %) before and after testing. Colored PV minimodules with this treatment retained consistent color (CIEDE2000 &lt; 4) and showed less than 2 % reduction in short-circuit density, confirming that the pre-stabilization process effectively improves stability without adverse effects.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"295 ","pages":"Article 113968"},"PeriodicalIF":6.3,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107180","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
Numerical investigation of synergistic interactions between fill ratio and inclination angle in nanofluid heat pipes 纳米流体热管填充比与倾角协同作用的数值研究
IF 6.3 2区 材料科学
Solar Energy Materials and Solar Cells Pub Date : 2025-09-18 DOI: 10.1016/j.solmat.2025.113966
Gang Yang , Ruitao Zhang , Haoxuan Li , Chunhua Zhang , Gang Li , Xiaobin Gu , Alfiya I. Aminova , G. Th Guria , Nevzat Akkurt , Zhiying Gao , Qian Xu
{"title":"Numerical investigation of synergistic interactions between fill ratio and inclination angle in nanofluid heat pipes","authors":"Gang Yang ,&nbsp;Ruitao Zhang ,&nbsp;Haoxuan Li ,&nbsp;Chunhua Zhang ,&nbsp;Gang Li ,&nbsp;Xiaobin Gu ,&nbsp;Alfiya I. Aminova ,&nbsp;G. Th Guria ,&nbsp;Nevzat Akkurt ,&nbsp;Zhiying Gao ,&nbsp;Qian Xu","doi":"10.1016/j.solmat.2025.113966","DOIUrl":"10.1016/j.solmat.2025.113966","url":null,"abstract":"<div><div>Nanofluid-based heat pipe solar collectors represent an efficient conversion device for solar energy. The fill ratio and inclination angle synergistically influence the thermal performance of heat pipes by altering the size and path of the vapor-liquid flow region. However, the quantitative relationship governing this synergistic interaction remains unclear. This study presents a novel Computational Fluid Dynamics (CFD) numerical model tailored for nanofluid heat pipes, accurately simulating evaporation and condensation processes. The model is validated against experimental data, exhibiting a maximum deviation of 6.99 % in wall temperature. By conducting an in-depth analysis of the wall temperature, wall liquid film velocity, and thermal resistance, this study quantitatively elucidates the synergistic mechanism of the fill ratio and inclination angle on the heat pipe's thermal performance. The results demonstrate that the fill ratio and inclination angle primarily influence the thermal resistance of the heat pipe by altering the vapor-liquid flow velocity, which in turn affects the convective heat transfer intensity. The results indicate that the fill ratio exerts a more pronounced impact on the thermal resistance of the heat pipe than the inclination angle, although this effect gradually diminishes as both parameters increase. The predictive modeling has identified the optimum fill ratio and inclination angle as 73.4 % and 61.9°, respectively, resulting in a thermal resistance of R = 0.6390 <span><math><mrow><mo>±</mo><mn>0.163</mn></mrow></math></span> K/W. This represents a 47.4 % <span><math><mrow><mo>±</mo><mn>13.4</mn><mo>%</mo></mrow></math></span> reduction compared to the thermal resistance observed at a 10 % fill ratio and a 10° inclination angle.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"295 ","pages":"Article 113966"},"PeriodicalIF":6.3,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107182","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
Bilayer structure perovskite solar cells with ruddlesden-popper phase for improved stability and performance 具有双层结构的钙钛矿太阳能电池的船舵-popper相,以提高稳定性和性能
IF 6.3 2区 材料科学
Solar Energy Materials and Solar Cells Pub Date : 2025-09-18 DOI: 10.1016/j.solmat.2025.113970
Won-Gyu Choi, Jae-Seong Jeong
{"title":"Bilayer structure perovskite solar cells with ruddlesden-popper phase for improved stability and performance","authors":"Won-Gyu Choi,&nbsp;Jae-Seong Jeong","doi":"10.1016/j.solmat.2025.113970","DOIUrl":"10.1016/j.solmat.2025.113970","url":null,"abstract":"<div><div>Organic-inorganic perovskite solar cells have shown considerable development, and these impressive performance enhancements have generated much interest in their commercial use. The main research challenge in the commercialization of perovskite is its long-term stability. In this study, we aim to improve the stability and performance of the perovskite solar cells by using a bilayer structure of 3D FAPbI<sub>3</sub> (FA = formamidinium) and 2D BA<sub>2</sub>PbI<sub>4</sub> (BA = butylammonium) perovskites. The 2D perovskite layer was continuously formed along the surface of the 3D layer via double spin coating, with the 2D layer thicknesses being controlled using various BA<sub>2</sub>PbI<sub>4</sub> solution concentrations. Introducing the 2D perovskite effectively suppresses humidity-induced degradation by preventing moisture ingress and reduces recombination loss by passivating surface trap states, thereby considerably improving both the stability and performance of perovskite solar cells. As a result, a bilayer perovskite solar cell with a 55 nm-thick 2D layer maintained ∼93 % of its initial efficiency after 500 h in long-term stability under 85 % relative humidity at 85 °C and exhibited the best efficiency of 20.25 %.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"295 ","pages":"Article 113970"},"PeriodicalIF":6.3,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107185","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
Efficiently and greenly removal of EVA encapsulant from photovoltaic modules: A sequential swelling-dissolution approach 高效、环保地从光伏组件中去除EVA封装剂:一种连续的膨胀-溶解方法
IF 6.3 2区 材料科学
Solar Energy Materials and Solar Cells Pub Date : 2025-09-17 DOI: 10.1016/j.solmat.2025.113923
Xiaochao Zou, Mingyu Ma, Guien Zhou, Yingdi Xu, Juan Wu, Muzamil Ali Brohi, Dengxin Li, Shihong Xu, Wenjing Sang
{"title":"Efficiently and greenly removal of EVA encapsulant from photovoltaic modules: A sequential swelling-dissolution approach","authors":"Xiaochao Zou,&nbsp;Mingyu Ma,&nbsp;Guien Zhou,&nbsp;Yingdi Xu,&nbsp;Juan Wu,&nbsp;Muzamil Ali Brohi,&nbsp;Dengxin Li,&nbsp;Shihong Xu,&nbsp;Wenjing Sang","doi":"10.1016/j.solmat.2025.113923","DOIUrl":"10.1016/j.solmat.2025.113923","url":null,"abstract":"<div><div>As the photovoltaic (PV) industry continues to grow rapidly, there is a growing demand for efficient and environmentally friendly recycling solutions for end-of-life modules.</div><div>A key technical barrier is the removal of the ethylene-vinyl acetate (EVA) encapsulant, which impedes the reclamation of valuable materials. This study introduces an sequential swelling-dissolution approach for the complete and green removal of EVA from crystalline silicon PV modules. A pre-treatment step utilizing limonene, a bio-based solvent, effectively swells the cross-linking EVA network, facilitating the detachment of the backsheet and enhancing the accessibility of the encapsulant. A solution of sodium hydroxide (NaOH) in benzyl alcohol (BA) is employed to thoroughly dissolve the swollen EVA from the solar cell surface. The effects of various parameters, including temperature, reaction time, stirring speed, solid-liquid ratio, reagent concentration, and module piece size, on backsheet detachment and EVA removal efficiency were systematically investigated. Characterization techniques such as Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Thermogravimetric Analysis (TGA), and Gas Chromatography-Mass Spectrometry (GC-MS) were utilized to analyze the cleaned cell surfaces, the chemical integrity of the solvents post-reaction, and the composition of the backsheet. The results demonstrate that this sequential chemical process can achieve near-complete EVA removal (e.g., 99.76 % removal in 50 min under optimized dissolution conditions) in under 1.5 h at moderate temperatures. FTIR analysis indicated the potential for solvent reuse. SEM imaging confirmed the cleanliness of the retrieved silicon wafers. The underlying mechanisms of EVA swelling by limonene and subsequent saponification and dissolution in NaOH-BA are also discussed.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"295 ","pages":"Article 113923"},"PeriodicalIF":6.3,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107178","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
Green solvents for end-of-life photovoltaic module recycling: Mechanisms, applications, environmental and economic perspectives 报废光伏组件回收的绿色溶剂:机制、应用、环境和经济观点
IF 6.3 2区 材料科学
Solar Energy Materials and Solar Cells Pub Date : 2025-09-17 DOI: 10.1016/j.solmat.2025.113964
Piyal Chowdhury , Tamal Chowdhury , Priyom Das , Hemal Chowdhury , Elza Bontempi , Richard Corkish
{"title":"Green solvents for end-of-life photovoltaic module recycling: Mechanisms, applications, environmental and economic perspectives","authors":"Piyal Chowdhury ,&nbsp;Tamal Chowdhury ,&nbsp;Priyom Das ,&nbsp;Hemal Chowdhury ,&nbsp;Elza Bontempi ,&nbsp;Richard Corkish","doi":"10.1016/j.solmat.2025.113964","DOIUrl":"10.1016/j.solmat.2025.113964","url":null,"abstract":"<div><div>The significant rise in photovoltaic (PV) deployment has led to growing concerns over end-of-life (EOL) PV waste, highlighting the need for sustainable recycling technologies. Conventional recycling methods often involve high energy consumption or toxic chemicals. Green solvents have gained considerable attention as promising alternatives. Importantly, green solvents in EOL PV recycling serve two main functions: (i) removing or delaminating polymer encapsulants to separate glass and backsheet, and (ii) leaching valuable metals such as silicon, aluminium, and silver from the solar cells. Despite growing interest, the literature does not yet provide a comprehensive understanding of these applications. This review addresses this gap by examining a range of green solvents such as supercritical fluids, bio-based solvents, water, and deep eutectic solvents in the context of EOL PV recycling. This review found that these solvents offer reduced environmental impact, high separation efficiency of the encapsulation layer, and reusability, with a study reporting solvent reuse up to twenty-four times. Despite these benefits, green solvents face limitations in scalability and cost. Future research should focus on process optimization and the techno-economic feasibility of using these solvents in PV recycling processes.</div></div>","PeriodicalId":429,"journal":{"name":"Solar Energy Materials and Solar Cells","volume":"295 ","pages":"Article 113964"},"PeriodicalIF":6.3,"publicationDate":"2025-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145107184","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
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