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Issue 2, 2015
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High-performance fullerene-free polymer solar cells with 6.31% efficiency

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Abstract

A nonfullerene electron acceptor (IEIC) based on indaceno[1,2-b:5,6-b′]dithiophene and 2-(3-oxo-2,3-dihydroinden-1-ylidene)malononitrile was designed and synthesized. IEIC exhibited good thermal stability, strong absorption in the 500–750 nm region with an extinction coefficient of 1.1 × 105 M−1 cm−1 at 672 nm, deep LUMO energy level (−3.82 eV) close to those of fullerenes, and a relatively high electron mobility of 2.1 × 10−4 cm2 V−1 s−1. Fullerene-free polymer solar cells (PSCs) based on the blends of the IEIC acceptor and a low-bandgap polymer donor PTB7-TH, using a perylene diimide derivative as a cathode interlayer, showed power conversion efficiencies (PCEs) of up to 6.31%, which is among the best PCEs reported for fullerene-free PSCs.

Graphical abstract: High-performance fullerene-free polymer solar cells with 6.31% efficiency

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Supplementary files

Article information


Submitted
29 Oct 2014
Accepted
05 Dec 2014
First published
18 Dec 2014

Energy Environ. Sci., 2015,8, 610-616
Article type
Paper

High-performance fullerene-free polymer solar cells with 6.31% efficiency

Y. Lin, Z. Zhang, H. Bai, J. Wang, Y. Yao, Y. Li, D. Zhu and X. Zhan, Energy Environ. Sci., 2015, 8, 610
DOI: 10.1039/C4EE03424D

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