Hybrid nonfullerene acceptors based on thieno[2′,3′:4,5]thieno[3,2-b]indole for efficient organic solar cells

IF 4 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Synthetic Metals Pub Date : 2024-11-14 DOI:10.1016/j.synthmet.2024.117785

Zhiyong Zhang , Qijie Lin , Liang Xie , Zeguang Wu , Lifei Yi , Jiamin Cao , Qiang Tao , Wanqiang Liu , Xin Zhang , Hui Huang

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Abstract

The emergence of non-fullerene acceptors (NFAs) has revived organic solar cells (OSCs) and promoted its industrialization significantly. Nowadays there are two main kinds of fused-ring electron acceptors: ITIC series and Y-series NFAs. Herein, two hybrid NFAs TIT-H and TIT-EH integrated ITIC series and Y-series NFAs have been developed, which based on thieno[2′,3′:4,5]thieno[3,2-b]indole-thiophene with one spiro group. TIT-H and TIT-EH both exhibited excellent thermal stability, low optical bandgaps of ∼1.5 eV, planar molecular geometries, and suitable energy levels. As a result, OSCs based on PM6:TIT-EH afforded a decent PCE of 13.32 %, with an V_OC of 0.856 V, a J_SC of 23.50 mA/cm² and a FF of 65.91 %, which was due to the suitable intermolecular interactions of TIT-EH, balanced charge carrier mobilities and face-on orientation in blend films. As comparison, PM6:TIT-H cell exhibited lower PCE of 12.26 %. These results demonstrated that hybrid NFAs are promising for OSC applications.

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基于噻吩并[2′,3′:4,5]噻吩并[3,2-b]吲哚的混合非富勒烯受体用于高效有机太阳能电池

非富勒烯受体（NFAs）的出现振兴了有机太阳能电池（OSCs），并极大地推动了其产业化进程。目前，熔环电子受体主要有两种：ITIC 系列和 Y 系列 NFA。本文以带有一个螺基的噻吩并[2′,3′:4,5]噻吩并[3,2-b]吲哚-噻吩为基础，开发了两种集成了 ITIC 系列和 Y 系列 NFA 的混合 NFA TIT-H 和 TIT-EH。TIT-H 和 TIT-EH 都具有出色的热稳定性、1.5 eV 以下的低光带隙、平面分子几何形状和合适的能级。因此，基于 PM6:TIT-EH 的 OSC 具有 13.32 % 的良好 PCE，VOC 为 0.856 V，JSC 为 23.50 mA/cm2，FF 为 65.91 %。相比之下，PM6:TIT-H 电池的 PCE 较低，仅为 12.26%。这些结果表明，混合 NFA 在 OSC 应用中大有可为。

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来源期刊

Synthetic Metals 工程技术-材料科学：综合

CiteScore

8.30

自引率

4.50%

发文量

189

审稿时长

33 days

期刊介绍： This journal is an international medium for the rapid publication of original research papers, short communications and subject reviews dealing with research on and applications of electronic polymers and electronic molecular materials including novel carbon architectures. These functional materials have the properties of metals, semiconductors or magnets and are distinguishable from elemental and alloy/binary metals, semiconductors and magnets.