Nonfullerene acceptors based on extended fused rings flanked with benzothiadiazolyl-methylenemalononitrile for polymer solar cells

被引：92

作者：

Bai, Huitao ^{[1
,2
]}

Wu, Yao ^{[1
]}

Wang, Yifan ^{[2
,4
]}

Wu, Yang ^{[3
]}

Li, Rong ^{[1
]}

Cheng, Pei ^{[2
,4
]}

Zhang, Mingyu ^{[1
]}

Wang, Jiayu ^{[1
]}

Ma, Wei ^{[3
]}

Zhan, Xiaowei ^{[1
]}

机构：

[1] Peking Univ, Coll Engn, Dept Mat Sci & Engn, Key Lab Polymer Chem & Phys,Minist Educ, Beijing 100871, Peoples R China

[2] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Key Lab Organ Solids, Beijing 100190, Peoples R China

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

[4] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 41期

关键词：

OPEN-CIRCUIT-VOLTAGE; NON-FULLERENE; PHOTOVOLTAIC PERFORMANCE; QUANTUM EFFICIENCY; ELECTRON-ACCEPTORS; SMALL MOLECULES; DONOR; DIKETOPYRROLOPYRROLE; INDACENODITHIOPHENE; ABSORPTION;

D O I：

10.1039/c5ta05901a

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：

Two novel A-D-A type molecules IDT-2BM and IDTT-2BM with extended fused-ring indacenodithiophene (IDT) or indacenodithienothiophene (IDTT) units as cores and strong electron-withdrawing unit 2-(benzo[c][1,2,5]thiadiazol-4-ylmethylene)malononitrile (BM) as the end-capping group were synthesized and investigated as electron acceptors in solution-processed polymer solar cells (PSCs). IDT-2BM and IDTT-2BM exhibited strong and broad absorption from 300 to 800 nm, and appropriate LUMO (-3.8 eV) and HOMO (-5.5 to -5.6 eV) levels matching with the classical polymer donor PBDTTT-C-T. IDT-2BM and IDTT-2BM films exhibited intrinsic electron mobilities of about 3.7 x 10(-6) and 1.0 x 10(-5) cm(2) V-1 s(-1), respectively. Fullerene-free PSCs employing PBDTTT-C-T as the donor and IDT-2BM or IDTT-2BM as the acceptor afforded power conversion efficiencies of 4.26% and 4.81%, respectively.

引用

页码：20758 / 20766

页数：9

共 82 条

[1] n-Type Organic Semiconductors in Organic Electronics [J].