Boosted efficiency of conductive metal oxide-free pervoskite solar cells using poly(3-(4-methylamincarboxylbutyl)thiophene) buffer layers. (14th May 2020)

• Record Type: Journal Article
• Authors: Wen, Rongjiang; Xia, Yonggao; Huang, Huihui; Wen, Shuangchun; Wang, Jinzhao; Fang, JunFeng; Fan, Xi
• Is Part Of: Journal of physics. Volume 53:Number 28(2020)
• Publication Date: 2020-05-14
• Subjects: perovskite solar cells -- conductive metal oxide-free -- PEDOT:PSS -- P3CT-N -- work function; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/ab83be
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: Owing to low work functions of transparent anodes and poor contact issues at interfaces, p-i-n conductive metal oxide (CMO)-free perovskite solar cells (PVSCs) commonly suffer from a limited power conversion efficiency. Herein, we report an efficient CMO-free PVSC using poly(3-(4-methylamincarboxylbutyl)thiophene) (P3CT-N) modified poly(3, 4-ethylenedioxylenethiophene):poly(styrenesulfonate) (PEDOT:PSS) anodes. The contact angle between PEDOT:PSS anodes and P3CT-N buffer layers tend to be 0° for an intimate contact. Meanwhile, the work function of the PEDOT:PSS anodes coated with P3CT-N is as high as −5.11 eV, which substantially accounted for the raised ability of hole transport. All the parameters (i.e. open-circuit voltage, short-circuit current density and fill factor) were improved simultaneously. As a result, the efficiency of the CMO-free solar cells was significantly improved from 4.63% to 13.13%. Our results indicate that P3CT-N is suitable to the highly conductive but hydrophobic PEDOT:PSS anodes for making high-efficiency CMO-free PVSCs.