Over 12% Efficiency Nonfullerene All-Small-Molecule Organic Solar Cells with Sequentially Evolved Multilength Scale Morphologies

被引：292

作者：

Gao, Ke ^{[1
,2
,3
]}

Jo, Sae Byeok ^{[3
]}

Shi, Xueliang ^{[3
]}

Nian, Li ^{[1
,2
]}

Zhang, Ming ^{[4
]}

Kan, Yuanyuan ^{[3
]}

Lin, Francis ^{[3
]}

Kan, Bin ^{[3
]}

Xu, Bo ^{[3
]}

Rong, Qikun ^{[1
,2
]}

Shui, Lingling ^{[1
,2
]}

Liu, Feng ^{[4
]}

Peng, Xiaobin ^{[5
]}

Zhou, Guofu ^{[1
,2
]}

Cao, Yong ^{[5
]}

Jen, Alex K. -Y. ^{[3
,6
,7
]}

机构：

[1] South China Normal Univ, Guangdong Prov Key Lab Opt Informat Mat & Technol, South China Acad Adv Optoelect, Guangzhou 510006, Guangdong, Peoples R China

[2] South China Normal Univ, Inst Elect Paper Displays, South China Acad Adv Optoelect, Guangzhou 510006, Guangdong, Peoples R China

[3] Univ Washington, Dept Mat Sci & Engn, Seattle, WA 98195 USA

[4] Shanghai Jiao Tong Univ, Dept Phys & Astron, Shanghai 200240, Peoples R China

[5] South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China

[6] City Univ Hong Kong, Dept Chem, Kowloon, Hong Kong 999077, Peoples R China

[7] City Univ Hong Kong, Dept Mat Sci & Engn, Kowloon, Hong Kong 999077, Peoples R China

来源：

ADVANCED MATERIALS | 2019年 / 31卷 / 12期

基金：

中国国家自然科学基金;

关键词：

crystallinity; morphology; near-infrared absorption; nonfullerene acceptors; small-molecule solar cells; NON-FULLERENE; ELECTRON-ACCEPTOR; GAP; SEMICONDUCTORS; PHOTOVOLTAICS; OPTIMIZATION; MISCIBILITY; 9-PERCENT; DRIVEN; DONOR;

D O I：

10.1002/adma.201807842

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, two near-infrared absorbing molecules are successfully incorporated into nonfullerene-based small-molecule organic solar cells (NFSM-OSCs) to achieve a very high power conversion efficiency (PCE) of 12.08%. This is achieved by tuning the sequentially evolved crystalline morphology through combined solvent additive and solvent vapor annealing, which mainly work on ZnP-TBO and 6TIC, respectively. It not only helps improve the crystallinity of the ZnP-TBO and 6TIC blend, but also forms multilength scale morphology to enhance charge mobility and charge extraction. Moreover, it simultaneously reduces the nongeminate recombination by effective charge delocalization. The resultant device performance shows remarkably enhanced fill factor and J(sc). These result in a very respectable PCE, which is the highest among all NFSM-OSCs and all small-molecule binary solar cells reported so far.

引用

页数：10

共 69 条

[1] Modulation of the Molecular Orientation at the Bulk Heterojunction Interface via Tuning the Small Molecular Donor-Nonfullerene Acceptor Interactions [J].