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Synthesis of a side-chain hole transporting polymer through Mitsunobu post-functionalization for efficient inverted perovskite solar cells

Abstract

An efficient post-functionalization protocol of Mitsunobu reaction between a commercial reactive polymer of poly(4-vinylphenol) (PVP) and 9-(2-hydroxylethyl)-N,N,N,N-tetrakis(4-methoxyphenyl)-9H-carbazole-2,7-diamine) is reported to synthesize a novel side-chain polymer (PVP-CZ) with high density of hole transporting moieties. The polymer PVP-CZ exhibits adequate solvent resistance and excellent film forming ability for the fabrication of inverted perovskite solar cells (PVSCs). The thermal, optical and electrochemical properties of PVP-CZ were investigated in details. The steady-state photoluminescence (PL) and time resolved photoluminescence (TRPL) decay showed excellent hole-extracting ability of dopant-free PVP-CZ from the perovskite layer. As a result, the inverted PVSCs delivered a respectable power conversion efficiency of 17.75% with a high fill factor of 81.07%. These results indicate that synthetic strategy using the post-functionalization of Mitsunobu reaction is a promising protocol to develop novel side-chain hole transporting polymers for highly efficient PVSCs.

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Supplementary files

Article information


Submitted
26 Jan 2020
Accepted
22 Mar 2020
First published
23 Mar 2020

Polym. Chem., 2020, Accepted Manuscript
Article type
Paper

Synthesis of a side-chain hole transporting polymer through Mitsunobu post-functionalization for efficient inverted perovskite solar cells

L. Lan, X. Deng, J. Zhang, J. Luo and A. K. Y. Jen, Polym. Chem., 2020, Accepted Manuscript , DOI: 10.1039/D0PY00134A

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