Fused pentacyclic electron acceptors with four cis-arranged alkyl side chains for efficient polymer solar cells

被引：26

作者：

Hou, Ran ^{[1
]}

Li, Miao ^{[1
]}

Feng, Shiyu ^{[1
]}

Liu, Yahui ^{[1
]}

Wu, Liangliang ^{[1
]}

Bi, Zhaozhao ^{[2
]}

Xu, Xinjun ^{[1
]}

Ma, Wei ^{[2
]}

Bo, Zhishan ^{[1
]}

机构：

[1] Beijing Normal Univ, Coll Chem, Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China

[2] Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Shaanxi, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2018年 / 6卷 / 08期

关键词：

SMALL MOLECULAR ACCEPTOR; PHOTOVOLTAIC PERFORMANCE; BAND-GAP; CONJUGATED POLYMERS; DONOR MATERIAL; FULLERENE; DESIGN; ORIENTATION; DEVICES; ENABLES;

D O I：

10.1039/c7ta10026d

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have synthesized a novel kind of fused pentacyclic small molecule acceptor (IDIDT-C8) with cisarranged alkyl side chains for the first time. Specifically, four aliphatic groups were introduced on one side of the diindeno[1,2-b:2',1'-d] thiophene unit to construct the molecular backbone with cis-arranged side chains. Such cis-arranged alkyl side chains can play a significant role in adjusting the crystallinity and molecular packing styles. Therefore, the formation of large molecular aggregations can be suppressed in the photoactive layer. Accordingly, polymer solar cells (PSCs) fabricated with polymer PBDB-T as a donor and IDIDT-C8 as an acceptor show a maximum power conversion efficiency of 10.10% with an FF of 65.9%, a J(sc) of 15.81 mA cm(-2), and a high Voc of 0.97 V, which are among the highest values for single-junction PSCs with fused five-ring electron acceptors up to now.

引用

页码：3724 / 3729

页数：6

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