Suppression of light-induced phase segregation in all-inorganic wide-bandgap perovskite solar cells via molecular interaction design

IF 13.1 1区 化学 Q1 Energy
Jing Yang , Yunlong Gan , Mengqi Han , Shiheng Wang , Pengwei Li , Yiqiang Zhang , Gang Li , Yanlin Song
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引用次数: 0

Abstract

Wide-bandgap mixed-halide perovskites, particularly CsPbIBr2, hold great promise for multi-junction solar cells due to their well-matched bandgap and all-inorganic material system. However, their inherent susceptibility to light-induced phase segregation (LIPS) limits efficiency and stability. In this work, we investigate the effect of three organic additives—4-cyclopentene-1,3-dione (CPD), maleimide (HPD), and 3,4-dibromo-1H-pyrrole-2,5(2H,5H)-dione (BrPD)—on LIPS in wide-bandgap CsPbIBr2 perovskite films. The additives form various chemical interactions, including coordination bonds, hydrogen bonds, and ionic bonds, with I and undercoordinated Pb2+ ions, among which BrPD has the strongest interaction. This interaction regulates crystallization and improves film morphology. The BrPD-modified films have the largest grain size and the highest light stability, suppressing LIPS, enhancing carrier transfer, and improving device performance. BrPD-modified CsPbIBr2-based solar cells achieve a power conversion efficiency (PCE) of 11.34%, outperforming the control (8.96%) and other additives. Moreover, BrPD-modified devices show excellent stability, retaining 94% of their initial PCE after 60 min of continuous light exposure. This work highlights the potential of strategically selected organic additives to enhance the stability and performance of perovskite solar cells, offering valuable insights for the design of high-efficiency and long-lasting perovskite-based optoelectronic devices.
分子相互作用设计抑制全无机宽禁带钙钛矿太阳能电池光致相偏析
宽带隙混合卤化物钙钛矿,特别是CsPbIBr2,由于其良好的带隙匹配和全无机材料体系,在多结太阳能电池中具有很大的前景。然而,它们对光致相偏析(LIPS)的固有敏感性限制了效率和稳定性。在这项工作中,我们研究了三种有机添加剂- 4-环戊烯-1,3-二酮(CPD),马来酰亚胺(HPD)和3,4-二溴- 1h -吡咯-2,5(2H,5H)-二酮(BrPD)对宽带隙CsPbIBr2钙钛矿薄膜中LIPS的影响。添加剂与I -和欠配位Pb2+离子形成配位键、氢键和离子键等多种化学相互作用,其中BrPD的相互作用最强。这种相互作用调节结晶并改善薄膜形态。brpd改性薄膜具有最大的晶粒尺寸和光稳定性,抑制了LIPS,增强了载流子转移,提高了器件性能。brpd修饰的cspbibr2基太阳能电池的功率转换效率(PCE)为11.34%,优于对照组(8.96%)和其他添加剂。此外,brpd修饰的器件表现出优异的稳定性,在60 min的连续光照后保持了94%的初始PCE。这项工作强调了策略性地选择有机添加剂来增强钙钛矿太阳能电池的稳定性和性能的潜力,为设计高效和持久的钙钛矿基光电器件提供了有价值的见解。
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来源期刊
Journal of Energy Chemistry
Journal of Energy Chemistry CHEMISTRY, APPLIED-CHEMISTRY, PHYSICAL
CiteScore
19.10
自引率
8.40%
发文量
3631
审稿时长
15 days
期刊介绍: The Journal of Energy Chemistry, the official publication of Science Press and the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, serves as a platform for reporting creative research and innovative applications in energy chemistry. It mainly reports on creative researches and innovative applications of chemical conversions of fossil energy, carbon dioxide, electrochemical energy and hydrogen energy, as well as the conversions of biomass and solar energy related with chemical issues to promote academic exchanges in the field of energy chemistry and to accelerate the exploration, research and development of energy science and technologies. This journal focuses on original research papers covering various topics within energy chemistry worldwide, including: Optimized utilization of fossil energy Hydrogen energy Conversion and storage of electrochemical energy Capture, storage, and chemical conversion of carbon dioxide Materials and nanotechnologies for energy conversion and storage Chemistry in biomass conversion Chemistry in the utilization of solar energy
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