为了提高倒置钙钛矿太阳能电池的效率，尽量减少界面的掩埋缺陷。
Minimizing buried interfacial defects for efficient inverted perovskite solar cells.
机构信息
Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Shanghai Key Laboratory of Functional Materials Chemistry, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, China.
Institute of Physics and Astronomy, University of Potsdam, D-14476 Potsdam-Golm, Germany.
出版信息
Science. 2023 Apr 28;380(6643):404-409. doi: 10.1126/science.adg3755. Epub 2023 Apr 27.
Controlling the perovskite morphology and defects at the buried perovskite-substrate interface is challenging for inverted perovskite solar cells. In this work, we report an amphiphilic molecular hole transporter, (2-(4-(bis(4-methoxyphenyl)amino)phenyl)-1-cyanovinyl)phosphonic acid, that features a multifunctional cyanovinyl phosphonic acid group and forms a superwetting underlayer for perovskite deposition, which enables high-quality perovskite films with minimized defects at the buried interface. The resulting perovskite film has a photoluminescence quantum yield of 17% and a Shockley-Read-Hall lifetime of nearly 7 microseconds and achieved a certified power conversion efficiency (PCE) of 25.4% with an open-circuit voltage of 1.21 volts and a fill factor of 84.7%. In addition, 1-square centimeter cells and 10-square centimeter minimodules show PCEs of 23.4 and 22.0%, respectively. Encapsulated modules exhibited high stability under both operational and damp heat test conditions.
控制倒置钙钛矿太阳能电池中钙钛矿-衬底界面的钙钛矿形态和缺陷是一项挑战。在这项工作中，我们报告了一种两亲性的分子空穴传输体，(2-(4-(双(4-甲氧基苯基)氨基)苯基)-1-氰基乙烯基)膦酸，其具有多功能氰基乙烯基膦酸基团，并形成了钙钛矿沉积的超润湿底层，从而实现了高质量的钙钛矿薄膜，最大限度地减少了埋层界面的缺陷。所得钙钛矿薄膜的光致发光量子产率为 17%，Shockley-Read-Hall 寿命接近 7 微秒，认证的功率转换效率（PCE）为 25.4%，开路电压为 1.21 伏，填充因子为 84.7%。此外，1 平方厘米的电池和 10 平方厘米的微模块的 PCE 分别为 23.4%和 22.0%。封装模块在工作和湿热测试条件下均表现出高稳定性。
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