Dithieno[3,2-b:2′,3′-d]pyrrol Fused Nonfullerene Acceptors Enabling Over 13% Efficiency for Organic Solar Cells

被引：400

作者：

Sun, Jia ^{[1
]}

Ma, Xiaoling ^{[2
]}

Zhang, Zhuohan ^{[1
]}

Yu, Jiangsheng ^{[3
]}

Zhou, Jie ^{[1
]}

Yin, Xinxing ^{[1
]}

Yang, Linqiang ^{[1
]}

Geng, Renyong ^{[1
]}

Zhu, Rihong ^{[3
]}

Zhang, Fujun ^{[2
]}

Tang, Weihua ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China

[2] Beijing Jiaotong Univ, Minist Educ, Key Lab Luminescence & Opt Informat, Beijing 100044, Peoples R China

[3] Nanjing Univ Sci & Technol, MIIT Key Lab Adv Solid Laser, Nanjing 210094, Jiangsu, Peoples R China

来源：

ADVANCED MATERIALS | 2018年 / 30卷 / 16期

基金：

中国国家自然科学基金;

关键词：

dithieno[3,2-b:2 ',3 '-d]pyrrol; high-performance organic solar cells; narrow bandgap; nonfullerene acceptors; FULLERENE ELECTRON-ACCEPTOR; SMALL MOLECULES; ENERGY-LOSSES; POLYMER; PERFORMANCE; DESIGN; MORPHOLOGY; COPOLYMERS; NETWORK;

D O I：

10.1002/adma.201707150

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new electron-rich central building block, 5,5,12,12-tetrakis(4-hexylphenyl)-indacenobis-(dithieno[3,2-b:2',3'-d]pyrrol) (INP), and two derivative nonfullerene acceptors (INPIC and INPIC-4F) are designed and synthesized. The two molecules reveal broad (600-900 nm) and strong absorption due to the satisfactory electron-donating ability of INP. Compared with its counterpart INPIC, fluorinated nonfullerene acceptor INPIC-4F exhibits a stronger near-infrared absorption with a narrower optical bandgap of 1.39 eV, an improved crystallinity with higher electron mobility, and down-shifted highest occupied molecular orbital and lowest unoccupied molecular orbital energy levels. Organic solar cells (OSCs) based on INPIC-4F exhibit a high power conversion efficiency (PCE) of 13.13% and a relatively low energy loss of 0.54 eV, which is among the highest efficiencies reported for binary OSCs in the literature. The results demonstrate the great potential of the new INP as an electron-donating building block for constructing high-performance nonfullerene acceptors for OSCs.

引用

页数：8

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