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| 1 | 甲脒基卤化物钙钛矿薄膜的相稳定性显示文摘甲脒基卤化物钙钛矿(FAPbI_(3))太阳电池具有光生载流子寿命长、光电转换效率高等优点,是目前光伏领域的研究热点.然而,在室温条件下,FAPbI_(3)的相稳定性差,会从具有光电活性的立方α相逐渐转变为非活性的六方δ相,是限制卤化物钙钛矿太阳电池发展的难题之一.本文研究了不同温度条件下FAPbI3薄膜的相变行为,发现其相稳定性主要受过冷度和离子热运动两种因素的影响,在80℃条件下的相稳定性明显高于20℃的结果.与传统A位掺杂替代FA^(+)和X位掺杂替代I^(-)方法不同,本文采取B位掺杂以Eu2+替代Pb^(2+),发现掺杂的薄膜样品的光吸收谱、晶格衍射峰、光致发光等结构与光学特性的稳定性都得到明显提升,表明该B位掺杂可以有效提高FAPbI_(3)光电活性α相的稳定性.本文结果为FAPbI3钙钛矿的相稳定性研究提供了新的研究思路. | 孙秋雨 孔维瑜 张才益 杨旭东 | 2021 | 中国科学:物理学、力学、天文学2021，51，8： | 1 |
| 2 | Modulating preferred crystal orientation for efficient and stable perovskite solar cells—From progress to perspectives显示文摘The perovskite solar cell(PSC)has been recognized as a promising candidate for the next generation of photovoltaics due to its excellent power conversion efficiency(PCE),potential low cost and straightforward solution preparation processes.With efforts around the world,the PCE of PSCs has reached 25.7%.As the perovskite film is the most important part of a PSC,its quality dramatically affects the efficiency and stability of the PSC.Numerous works have focused on controlling crystallization to realize oriented growth of perovskite films.Particularly,considering the photoelectric anisotropy of perovskite materials,it is very meaningful to investigate the relationship between preferred crystal orientation and device efficiency and stability.This review highlights various approaches for realizing preferred crystal orientation of polycrystalline perovskite films,including optimizing the perovskite precursor solution and film annealing process,additive engineering,and interface engineering.Furthermore,the key factors affecting oriented crystal growth are carefully discussed,which provides effective guidance to obtain highly-oriented perovskite films for highly efficient and stable PSCs. | Zhimin Fang Nan Yan Shengzhong(Frank)Liu | 2022 | InfoMat2022，4，10： | 0 |
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