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oe1(光电查) - 科学论文

2 条数据
?? 中文（中国） ▾

  • Enhanced thermal stability of electron transport layer-free perovskite solar cells via interface strain releasing

    摘要： The thermal decomposition of perovskite films on ZnO surfaces is generally believed to originate from specific surface states of ZnO and the impact from the lattice mismatch between ZnO and perovskite films on this process has long been ignored. In this research, the role of lattice mismatch in the thermal degradation process of cesium-containing perovskite films on Al doped ZnO (AZO) is studied. A Ba(OH)2 buffer layer on the surface of AZO is employed to release the lattice mismatch and suppress the thermal degradation of perovskite films resulted from ZnO. Consequently, perovskite films with enhanced thermal stability and crystalline properties are obtained. Meanwhile, the Ba(OH)2 films efficiently passivate the surface trap states and reduce the vacuum level of the AZO surfaces. On this basis, electron transport layer-free perovskite solar cells yield the best efficiency of 18.18% and the thermal stability is obviously improved.

    关键词： Lattice mismatch,Perovskite solar cell,Electron transport layer-free,Thermal stability

    更新于2025-09-16 10:30:52

  • Selfa??Assembled Ionic Liquid for Highly Efficient Electron Transport Layer Free Perovskite Solar Cells

    摘要： The electron-transport-layer (ETL) free perovskite solar cells (PSCs) are attractive because of fewer layers and hence lower cost, but the lower photovoltaic performance, as compared to the ETL-contained PSCs, largely restricts their practical applications. Herein, we design and synthesize hydroxylethyl functionalized imidazolium iodide, whose single crystal structure is determined, and propose self-assembled ionic liquid on the conductive substrate for ETL-free PSCs. It is found that the self-assembly of the ionic liquid on the conductive substrate can lower the work function of the conductive substrate, enhance the interfacial electron extraction, and meanwhile retard interfacial charge recombination. As a consequence, the power conversion efficiency is remarkably improved from 9.01% to 17.31% upon the self-assembly of ionic liquid on the conductive substrate. This finding provides a new way to achieve highly efficient ETL free PSCs.

    关键词： electron transport layer free,perovskite solar cell,self-assembly,Ionic liquid,work function

    更新于2025-09-16 10:30:52