Tuning the phase separation of PEDOT:PSS affords efficient lead-free perovskite solar cells

Hui Zhang; Shurong Wang; Huanhuan Yao; Zhiyue Tang; Liming Ding; Feng Hao

doi:10.1039/d2cc07021a

Tuning the phase separation of PEDOT:PSS affords efficient lead-free perovskite solar cells

Chem Commun (Camb). 2023 Feb 21;59(16):2251-2254. doi: 10.1039/d2cc07021a.

Authors

Hui Zhang¹, Shurong Wang¹, Huanhuan Yao¹, Zhiyue Tang¹, Liming Ding², Feng Hao¹

Affiliations

¹ School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China. haofeng@uestc.edu.cn.
² Center for Excellence in Nanoscience (CAS), Key Laboratory of Nanosystem and Hierarchical Fabrication (CAS), National Center for Nanoscience and Technology, Beijing, 100190, China.

PMID: 36744993
DOI: 10.1039/d2cc07021a

Abstract

Poly(3,4-ethylenedioxythiphene):poly(styrenesulfonate) (PEDOT:PSS) shows great potential for applications in tin halide perovskite solar cells (TPSCs). Nevertheless, the physicochemical, electrical properties and surface characteristics of pristine PEDOT:PSS are poorly suitable for high-quality tin halide perovskite films, as well as for efficient carrier transport. In this work, we tuned the phase separation of PEDOT and PSS chains by ammonium carbamate (AC). The modified film showed a lower trap density and more facile carrier transport than did the pristine film. Consequently, the target TPSCs achieved a substantially improved short-circuit photocurrent (J_sc) and open-circuit voltage (V_oc), together with a markedly improved power conversion efficiency (PCE) from 9.48% to 11.24%.