Rational Tuning of Molecular Interaction and Energy Level Alignment Enables High-Performance Organic Photovoltaics

被引：186

作者：

Wang, Rui ^{[1
,2
,4
]}

Yuan, Jun ^{[1
,2
,3
]}

Han, Guangchao ^{[5
]}

Huang, Tianyi ^{[1
,2
]}

Huang, Wenchao ^{[1
,2
]}

Xue, Jingling ^{[1
,2
]}

Wang, Hao-Cheng ^{[6
]}

Zhang, Chunfeng ^{[4
]}

Zhu, Chenhui ^{[7
]}

Cheng, Pei ^{[1
,2
]}

Meng, Dong ^{[1
,2
]}

Yi, Yuanping ^{[5
]}

Wei, Kung-Hwa ^{[6
]}

Zou, Yingping ^{[3
]}

Yang, Yang ^{[1
,2
]}

机构：

[1] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA

[2] Univ Calif Los Angeles, Calif NanoSyst Inst, Los Angeles, CA 90095 USA

[3] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China

[4] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Sch Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[5] Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, CAS Key Lab Organ Solids, Beijing 100190, Peoples R China

[6] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 30010, Taiwan

[7] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

来源：

ADVANCED MATERIALS | 2019年 / 31卷 / 43期

基金：

中国国家自然科学基金;

关键词：

driving force; energy alignment; morphology; organic photovoltaics; organic solar cells; SOLAR-CELLS; POLYMER; EFFICIENCY; ACCEPTOR;

D O I：

10.1002/adma.201904215

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The performance of organic photovoltaics (OPVs) has rapidly improved over the past years. Recent work in material design has primarily focused on developing near-infrared nonfullerene acceptors with broadening absorption that pair with commercialized donor polymers; in the meanwhile, the influence of the morphology of the blend film and the energy level alignment on the efficiency of charge separation needs to be synthetically considered. Herein, the selection rule of the donor/acceptor blend is demonstrated by rationally considering the molecular interaction and energy level alignment, and highly efficient OPV devices using both-fluorinated or both-nonfluorinated donor/acceptor blends are realized. With the enlarged absorption, ideal morphology, and efficient charge transfer, the devices based on the PBDB-T-F/Y1-4F blend and PBDB-T-F/Y6 exhibit champion power conversion efficiencies as high as 14.8% and 15.9%, respectively.

引用

页数：9

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