In:
Advanced Optical Materials, Wiley, Vol. 8, No. 17 ( 2020-09)
Abstract:
Poly(3,4‐ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) can be roll‐to‐roll deposited on the substrate facilely in the electronics, but its acidity and mismatched energy level limit the performance and stability. Herein, different metal salts are incorporated into PEDOT:PSS solution to prepare PEDOT:PSS‐A x O y (metal oxide) composite hole transport layer and it is found that the performance of inverted perovskite solar cells (PSCs) can be greatly enhanced. PSC using PEDOT:PSS‐MoO x has achieved much higher power conversion efficiency (PCE) (19.64%) than that of pristine PEDOT:PSS (12.19%). Two key factors are important for the performance enhancement. First, the increased surface free energy of PEDOT:PSS‐A x O y is beneficial for the formation of large crystal size and pinhole‐free film, leading to reduced nonradiative recombination. Second, the work function of PEDOT:PSS can be tuned to match the energy level of photoactive layer with small amount incorporation, which greatly enhances the photovoltage by a factor of 1.1. Besides, the devices based on PEDOT:PSS‐A x O y exhibit improved long‐term stability. Unencapsulated PSCs with PEDOT:PSS‐MoO x retain over 90% and 80% of their initial PCEs in N 2 for 45 d and in ambient air for 20 d, respectively. The modified PEDOT:PSS solutions overcome the intrinsic imperfection and can be potentially employed for large‐scale production in the electronic devices.
Type of Medium:
Online Resource
ISSN:
2195-1071
,
2195-1071
DOI:
10.1002/adom.202000216
Language:
English
Publisher:
Wiley
Publication Date:
2020
detail.hit.zdb_id:
2708158-8
Permalink
