Additive-Enhanced Crystallization of Solution Process for Planar Perovskite Solar Cells with Efficiency Exceeding 19 .
Additive-Enhanced Crystallization of Solution Process for Planar Perovskite Solar Cells with Efficiency Exceeding 19 .
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DOI：
10.1002/chem.201704181
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发表时间：
2017-12
期刊：
影响因子：
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通讯作者：
Shuai You;Shiqing Bi;Jing Huang;Qiushuang Jia;Yuhe Yuan;Yanjie Xia;Zhenyu Xiao;Zhuzhu Sun;
中科院分区：
文献类型：
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作者：
Shuai You;Shiqing Bi;Jing Huang;Qiushuang Jia;Yuhe Yuan;Yanjie Xia;Zhenyu Xiao;Zhuzhu Sun;
为了降低钙钛矿薄膜中的本征缺陷密度，通常将各种添加剂添加到前体溶液中。本文提出了一种新的制备普通平板型钙钛矿太阳能电池的方法，即在前驱体溶液中加入异丙醇（IPA）。利用这种方法实现了19.70%的冠军功率转换效率（PCE）。通过将IPA添加到前体溶液中，CH3 NH3 PbI3钙钛矿显示出更好的结晶和稳定性，表明改善的膜质量。由于钙钛矿晶体形貌的改善，PSC的PCE增加。此外，未包封的PSC在室温下在空气中保持高输出长达40天，表明PSC的稳定性。这些结果可能为制备高效率和高稳定性的PSC提供新的途径。
To reduce intrinsic defect density in perovskite films, various additives are often added into the precursor solution. In this paper, a novel solution, in which isopropanol (IPA) was added into the precursor solution, was developed for the preparation of normal planar perovskite solar cells (PSCs). A champion power conversion efficiency (PCE) of 19.70 % was achieved with this approach. By adding IPA into the precursor solution, CH3 NH3 PbI3 perovskite showed better crystallization and stability, indicating improved film quality. Because of the improved morphology of perovskite crystal, the PCE of PSCs increased. In addition, the unencapsulated PSCs retained high output for up to 40 days in air at room temperature, indicating the stability of PSCs. These results may provide a new avenue for manufacturing high efficiency and high stability PSCs.