Mo5+ doping induced interface polarization for improving performance of planar perovskite solar cells  

作　　者：Yurong Jiang Yue Yang Yiting Liu Shan Yan Yanxing Feng Congxin Xia 

机构地区：[1]School of Physics,Henan Key Laboratory of Photovoltaic Materials,Henan Normal University,Xinxiang 453007,China

出　　处：《Journal of Semiconductors》2020年第5期78-85,105-106,共8页半导体学报（英文版）

基　　金：supported by Colleges Universities in Henan Province Key Scientific Research Project Funding Scheme(No.17A140020);Henan Province Nature Science Foundation Project(No.182300410241);Chinese Nature Science Foundation Committee(No.61640406).

摘　　要：In this paper,we investigate how interface-induced polarization affects the photovoltaic performance of hybrid perovskite solar cell(PSC)devices.The polarization of the hole transport layer(HTL)is regulated through incorporating metalliclike Mo Ox into PEDOT:PSS.The common Mo O3 doped into PEDOT:PSS is used as a reference,and the device that used PEDOT:PSS-Mo Ox as the HTL shows an enhanced Jsc and FF compared to the reference device.The open-circuit photovoltage decay and impedance spectroscopy measurements indicate that trap-assisted recombination is effectively suppressed at the interface between the hybrid perovskite and the PEDOT:PSS-Mo Ox HTL,while severe trap assisted recombination takes place at the perovskite/PEDOT:PSS and perovskite/PEDOT:PSS-Mo O3 interface.We attribute these experimental findings to the fact that the incorporation of metallic-like Mo5+into PEDOT:PSS enhances the conductivity of HTL and the interface polarization between PEDTOT:PSS layer and perovskite,which helps to induce an interface polarization electric field to facilitate separation of charges and screen the recombination between the traps and free charges.

关 键 词：CONDUCTIVITY HOLE-TRANSPORTING layer dielectric CONSTANT POLARIZATION 

分 类 号：TM914.4[电气工程—电力电子与电力传动]