High Efficiency over 18.6% of Organic Solar Cells Enabled by PEDOT:PSS/Br-2PACz Dual-Anode Interface

Jinna Zhang; Fei Jin; Ruixiang Peng; Jinfeng Ge; Yuntong Guo; Yi Qiu; Rong Zhou; Ziyi Ge

doi:10.1021/acsami.3c17981

High Efficiency over 18.6% of Organic Solar Cells Enabled by PEDOT:PSS/Br-2PACz Dual-Anode Interface

ACS Appl Mater Interfaces. 2024 Feb 21;16(7):9117-9125. doi: 10.1021/acsami.3c17981. Epub 2024 Feb 8.

Authors

Jinna Zhang^{1

2}, Fei Jin¹, Ruixiang Peng^{1

3}, Jinfeng Ge^{1

3}, Yuntong Guo¹, Yi Qiu¹, Rong Zhou¹, Ziyi Ge^{1

3}

Affiliations

¹ Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences, Ningbo 315201, P. R. China.
² Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, P. R. China.
³ Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, P. R. China.

PMID: 38330209
DOI: 10.1021/acsami.3c17981

Abstract

Organic solar cells (OSCs) with high performance were prepared using poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and [2-(3,6-dibromo-9H-carbazol-9-yl)ethyl]phosphonic acid (Br-2PACz) double-layer films as the anode interface. By spin-coating a layer of Br-2PACz on PEDOT:PSS to form a PEDOT:PSS/Br-2PACz dual-anode interface, both the J_sc and FF of the device can be increased simultaneously, resulting in a high J_sc of 27.84 mA cm^-2 and a high FF of 78.18%. The promising result indicates that the PEDOT:PSS/Br-2PACz dual-anode interface is an effective way to improve the performance of OSCs. The improvement of device performance is mainly attributed to (1) improved interface conductivity; (2) increased hole mobility and more balanced carrier transport efficiency; and (3) optimized morphology, which well explains the increase of J_sc and FF of the device. In addition, the OSC based on the PEDOT:PSS/Br-2PACz dual-anode interface exhibits exceptional stability, as it can maintain 94.7% of its initial efficiency even after 500 h of storage in a nitrogen environment. This work provides a promising strategy for improving the efficiency and stability of OSCs by dual-anode interface modulation.

Keywords: charge recombination; charge transfer; dual interface; efficiency; morphology regulation.