A Mixed PC 61 BM‐CO i 8DFIC Based Electron Transport Material for Inverted High‐performance Perovskite Solar Cells

Ali, Jazib; Li, Yu; Song, Jingnan; Zhang, Ming; Zhou, Guanqing; Xu, Jinqiu; Zhu, Lei; Hussain, Ahmad; Khan, Firoz; Liu, Feng

doi:10.1002/cnma.202200377

A Mixed PC ₆₁ BM‐CO i 8DFIC Based Electron Transport Material for Inverted High‐performance Perovskite Solar Cells

Journal Article · 27 November 2022 · ChemNanoMat

DOI:https://doi.org/10.1002/cnma.202200377· OSTI ID:2422626

^[1]; Li, Yu ^[2]; Song, Jingnan ^[3]; Zhang, Ming ^[3]; Zhou, Guanqing ^[3]; Xu, Jinqiu ^[3]; ^[3]; Hussain, Ahmad ^[4]; Khan, Firoz ^[5]; ^[3]

School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Center of Hydrogen Science Center of Physical Science Shanghai Jiao Tong University Shanghai 200240 P. R. China; Centre for Hybrid and Organic Solar Energy (CHOSE) Department of Electronic Engineering University of Rome Tor Vergata Rome 00133 Italy
National Synchrotron Radiation Laboratory (NSRL) University of Science and Technology of China Hefei Anhui 230029 P. R. China
School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules Center of Hydrogen Science Center of Physical Science Shanghai Jiao Tong University Shanghai 200240 P. R. China
Department of Physics, Sargodha Campus The University of Lahore Sargodha 40100 Pakistan
Interdisciplinary Research Center for Renewable Energy and Power Systems (IRC-REPS) King Fahd University of Petroleum and Minerals (KFUPM) Dhahran 31261 Saudi Arabia

Abstract

This study reports a blend of [6, 6]‐phenyl‐C61‐butyric acid methyl ester (PC₆₁BM) and COi8DFIC non‐fullerene acceptor (NFA) as an electron transport layer (ETL) in perovskite solar cells (PSCs). This mixed small‐molecule ETL showed good inter‐molecule mixing, reduced intermolecular distances and decent morphology, resulting in excellent charge carrier transport properties. Morever, charge carrier extraction and transport at the perovskite/ETL interface was optimized by reducing surface traps and defects due to the passivation ability of various terminal groups from the COi8DFIC molecule. A high power conversion efficiency (PCE) of 19.12 % was achieved by taking advantage of benefits from both molecules, showing much better performance than the invidual PC₆₁BM or COi8DFIC (7.13% for using the NFA only). Moreover, the storage and ambient stabilities of the mixed ETL‐based PSCs increased dramatically compared to control devices.

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC02-05CH11231

OSTI ID:: 2422626

Journal Information:: ChemNanoMat, Journal Name: ChemNanoMat Journal Issue: 1 Vol. 9; ISSN 2199-692X

Publisher:: Wiley

Country of Publication:: United States

Language:: English

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