New Wide Band Gap Donor for Efficient Fullerene-Free All-Small Molecule Organic Solar Cells

被引：269

作者：

Yang, Liyan ^{[1
,2
]}

Zhang, Shaoqing ^{[1
,3
]}

He, Chang ^{[1
,2
]}

Zhang, Jianqi ^{[2
,4
]}

Yao, Huifeng ^{[1
,2
]}

Yang, Yang ^{[4
]}

Zhang, Yun ^{[1
,2
]}

Zhao, Wenchao ^{[1
,2
]}

Hou, Jianhui ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China

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

[3] Univ Sci & Technol Beijing, Sch Chem & Biol Engn, Beijing 100083, Peoples R China

[4] Natl Ctr Nanosci & Technol, Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2017年 / 139卷 / 05期

关键词：

PHOTOINDUCED ELECTRON-TRANSFER; POLYMER PHOTOVOLTAIC CELLS; NONFULLERENE ACCEPTOR; HIGHLY EFFICIENT; PERFORMANCE; BULK; MORPHOLOGY; DESIGN; BENZODITHIOPHENE; HETEROJUNCTIONS;

D O I：

10.1021/jacs.6b11612

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new organic small molecule, DRTB-T, that incorporates a two-dimensional trialkylthienyl-substituted benzodithiophene core building block was designed and synthesized. DRTB-T has a band gap (E-g(opt)) of 2.0 eV with a low-lying highest occupied molecular orbital (HOMO) level of-5.51 eV. Nonfullerene small-molecule solar cells consisting of DRTB-T and a nonfullerene acceptor (IC-C6IDT-IC) were constructed, and the morphology of the active layer was fine-tuned by solvent vapor annealing (SVA). The device showed a record 9.08% power conversion efficiency (PCE) with a high open-circuit voltage (V-oc = 0.98 V). This is the highest PCE for a nonfullerene small-molecule organic solar cell (NFSM-OSC) reported to date. Our notable results demonstrate that the molecular design of a wide band gap (WBG) donor to create a well-matched donor acceptor pair with a low band gap (LBG) nonfullerene small-molecule acceptor, as well as subtle morphological control, provides great potential to realize high-performance NFSM-OSCs.

引用

页码：1958 / 1966

页数：9

共 66 条

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