基于自组装功能层的柔性钙钛矿光伏器件研究

The development of solar cells has drawn broad attention, due to the energy issue. The improvement of perovskite solar cell is fast recently. The characteristics of flexibility and natural degradation is very important for solar cells. Moreover, the self-assembled layer in devices shows stability and long life time. Therefore, flexible perovskite photovoltaic devices based on self-assembled layers will be investigated in this project. (1) The dielectric/metal/dielectric electrodes will be fabricated onto PET and natural degradation flexible substrates, and the flexible electrodes will be optimized systematically; (2) The organic/inorganic compound self-assembled layers will be connected onto the flexible electrodes, which is beneficial to the charge transport and extraction. (3) The perovskite photovoltaic devices based on self-assembled layers and flexible electrodes will be optimized step by step and flexible perovskite photovoltaic devices with high efficiency will be achieved accordingly.

在能源紧缺的今天，太阳能电池的研发引起各国科学家广泛关注。钙钛矿太阳能电池被认为是现今效率提升最快、最具发展前景的电池技术之一。目前，光伏器件可穿戴性、皮肤化以及可自然降解性越来越受到人们的重视。另外，有机/无机复合自组装功能层与电极具有较强的结合力与稳定性，这有助于提高器件的工作寿命。鉴于此，本项目研究基于自组装功能层的柔性钙钛矿光伏器件，具体包括三部分内容：（1）在柔性PET及可自然降解基底上制备介质/金属/介质多层导电膜层，系统调控其光电特性，制备出可应用于钙钛矿光伏器件的柔性电极；（2）利用水解和缩合反应自组装方法，在柔性电极上通过共价键连接，制备一层或多层有机/无机复合自组装功能层，有效改善膜层间的能级匹配及电荷传输、收集效率；（3）将自组装功能层修饰的柔性电极应用于钙钛矿光伏器件，通过多种途径优化柔性钙钛矿光伏器件性能，为实现高效钙钛矿光伏电池的可降解化、可穿戴化奠定研究基础。

太阳能是取之不尽用之不竭的绿色能源，而钙钛矿光伏器件是太阳能电池领域的后起之秀，具有很好的应用前景。该面上项目“基于自组装功能层的柔性钙钛矿光伏器件研究”，对我国钙钛矿电池的发展具有一定的指导作用。研究工作按照项目计划执行进展顺利，取得了一系列有意义的研究成果，归纳起来主要有如下几点：（1）多种新型功能层（p型，n型）的光电性能研究与界面优化，从而有效改善钙钛矿器件性能；（2）自组装功能层改善器件电极的光学电学性能；（3）高效柔性钙钛矿光伏器件的制备与优化。值得一提的是，课题组得到的柔性钙钛矿太阳能电池的效率和填充因子，均为当时该领域国际上的最高数值。