Improving efficiency of inverted perovskite solar cells via ethanolamine-doped PEDOT:PSS as hole transport layer  

作　　者：Zi-Jun Wang Jia-Wen Li Da-Yong Zhang Gen-Jie Yang Jun-Sheng Yu 王子君;李嘉文;张大勇;杨根杰;于军胜(State Key Laboratory of Electronic Thin Films and Integrated Devices,School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China(UESTC),Chengdu 610054,China)

机构地区：[1]State Key Laboratory of Electronic Thin Films and Integrated Devices,School of Optoelectronic Science and Engineering,University of Electronic Science and Technology of China(UESTC),Chengdu 610054,China

出　　处：《Chinese Physics B》2022年第8期631-638,共8页中国物理B（英文版）

基　　金：Project supported by the Regional Joint Fund of the Foundation of the National Natural Science Foundation of China(Grant No.U21A20492);the National Natural Science Foundation of China(Grant Nos.61421002,61675041,and 51703019);the Sichuan Provincial Science and Technology Program,China(Grant Nos.2021107,2019YFG0121,2019YJ0178,2020YFG0279,2020YFG0281,and 2021107);the Fund from the Sichuan Province Key Laboratory of Display Science and Technology,China。

摘　　要：In order to fabricate high-performance inverted perovskite solar cells(Pe SCs), an appropriate hole transport layer(HTL) is essential since it will affect the hole extraction at perovskite/HTL interface and determine the crystallization quality of the subsequent perovskite films. Herein, a facile and simple method is developed by adding ethanolamine(ETA)into poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS) as HTL. The doping of a low-concentration ETA can efficiently modify the electrical properties of the PEDOT:PSS film and lower the highest occupied molecular orbital(HOMO) level, which is more suitable for the hole extraction from the perovskite to HTL. Besides, ETA-doped PEDOT:PSS will create a perovskite film with larger grain size and higher crystallinity. Hence, the results show that the open-circuit voltage of the device increases from 0.99 V to 1.06 V, and the corresponding power conversion efficiency(PCE)increases from 14.68% to 19.16%. The alkaline nature of ethanolamine greatly neutralizes the acidity of PEDOT:PSS, and plays a role in protecting the anode, leading the stability of the devices to be improved significantly. After being stored for2000 h, the PCE of ETA-doped PEDOT:PSS devices can maintain 84.2% of the initial value, which is much higher than67.1% of undoped devices.

关 键 词：perovskite solar cells PEDOT:PSS ETHANOLAMINE DOPING 

分 类 号：TB34[一般工业技术—材料科学与工程] TM914.4[电气工程—电力电子与电力传动]