疏水载流子传输层上制备高效钙钛矿太阳电池的锚固策略  

Efficient Perovskite Solar Cells on Hydrophobic Carrier Transporting Layers by Anchoring Strategy

作　　者：田瀛 吴燕[1] 徐玉增 候敏娜 丁毅[1] 侯国付[1] 赵颖[1] 张晓丹[1] TIAN Ying;WU Yan;XU Yuzeng;HOU Minna;DING Yi;HOU Guofu;ZHAO Ying;ZHANG Xiaodan(Key Laboratory of Photoelectronic Thin Film Devices and Technology, Institute of Photoelectronic Thin Film Devices and Technology, Nankai University, Tianjin 300071, China)

机构地区：[1]南开大学,光电子薄膜器件与技术研究所,天津市光电子薄膜器件与技术重点实验室,天津300071

出　　处：《人工晶体学报》2020年第5期838-847,共10页Journal of Synthetic Crystals

基　　金：国家自然科学基金(61874061,61674084);国家重点研发计划(2018YFB1500103);111引智计划(B16027)。

摘　　要：几种常用的导电聚合物(如PTAA(聚三芳基胺))具有优良的光电特性,因此适合用作钙钛矿太阳电池中的空穴传输材料来提升器件性能。然而,这些材料的疏水特性导致难以形成致密且高质量的钙钛矿薄膜。此外,即使通过一些方法实现载流子传输层与钙钛矿膜之间的接触,但界面处也会存在严重的载流子复合。同时,这样制备出的粗糙钙钛矿薄膜会导致后续沉积在钙钛矿薄膜上的电子传输层的非均匀覆盖。因此,在疏水载流子传输层上实现良好钙钛矿薄膜沉积以获得优良器件性能仍然具有很大挑战性。在本研究中,利用PbI2进行锚固工程被证明是一种简便、绿色且有效的方法,可有效解决疏水载流子传输层浸润性问题。通过本方法,钙钛矿薄膜质量和器件性能得到了显著提高,并获得了效率高达19.53%的器件。同时,本方法也普遍适用于其他疏水的载流子传输层,进而制备优异的钙钛矿薄膜,这为高性能钙钛矿太阳电池的发展提供了一种可行策略。Several prominent conductive polymers such as PTAA possesses appealing photoelectric properties suitable to be adopted as the hole transporting materials in perovskite solar cells aiming for elevated performance.Unfortunately,hydrophobic surface hampers the formation of dense and high quality perovskite films above.Moreover,the undesirable contact between carrier transporting layer and perovskite film even achieved through some approaches also induce serious carrier recombination around the interface.Meanwhile,rough surface of perovskite film gives rise to the uncomplete coverage of sequent electron transport layer deposition.Consequently,it is still challenging to acheieve conformal deposition on hydrophobic carrier transporting layers to obtain excellent device performance.In this study,anchoring engineering utilizing PbI2 is demonstrated to be a facile,green and effective approach to solve the problem of wettability of hydrophobic carrier transport layer.By this method,the quality of perovskite film and the performance of the device are greatly improved,and devices which the efficiency is as high as 19.53%was obtained.At the same time,this method is also generally applicable to other hydrophobic carrier transport layers to prepare excellent perovskite films,offering a promising strategy for the development of high performance perovskite solar cells.

关 键 词：钙钛矿太阳电池 疏水性 载流子传输层 表面修饰 

分 类 号：TM914.4[电气工程—电力电子与电力传动]