Perovskite/Poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] Bulk Heterojunction for High-Efficient Carbon-Based Large-Area Solar Cells by Gradient Engineering

Jianhua Han; Xuewen Yin; Yu Zhou; Hui Nan; Youchen Gu; Meiqian Tai; Jianbao Li; Hong Lin

doi:10.1021/acsami.8b15399

Perovskite/Poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] Bulk Heterojunction for High-Efficient Carbon-Based Large-Area Solar Cells by Gradient Engineering

ACS Appl Mater Interfaces. 2018 Dec 12;10(49):42328-42334. doi: 10.1021/acsami.8b15399. Epub 2018 Nov 30.

Authors

Jianhua Han¹, Xuewen Yin¹, Yu Zhou¹, Hui Nan¹, Youchen Gu¹, Meiqian Tai¹, Jianbao Li^{1

2}, Hong Lin¹

Affiliations

¹ State Key Laboratory of New Ceramics & Fine Processing, School of Materials Science and Engineering , Tsinghua University , Beijing 10084 , China.
² State Key Laboratory of Marine Resource Utilization in South China Sea , Hainan University , Haikou 570228 , China.

PMID: 30457316
DOI: 10.1021/acsami.8b15399

Abstract

The performance of low-temperature carbon-based perovskite solar cells (C-PSCs) with high commercial potential was hampered by the inferior interface between the absorber and carbon electrode. In this work, poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) was dissolved in an antisolvent for spin-coating perovskite (CH₃NH₃PbI₃, MAPI) films, which was applied to modify both the MAPI films and the interface between the MAPI layer and carbon electrode by gradient engineering. Finally, the C-PSCs based on MAPI-PTAA gradient bulk heterojunction films achieved a power conversion efficiency of 13.0% with an active area of 1 cm², 26% higher than that of pristine MAPI cells, because of the passivated trap states, accelerated hole extraction, and improved crystalline properties in absorber films.

Keywords: PTAA; carbon-based solar cells; gradient engineering; large-area; perovskite.