Mechanically Robust All-Polymer Solar Cells from Narrow Band Gap Acceptors with Hetero-Bridging Atoms
Artikel i vetenskaplig tidskrift, 2020

We developed three narrow band-gap polymer acceptors PF2-DTC, PF2-DTSi, and PF2-DTGe with different bridging atoms (i.e., C, Si, and Ge). Studies found that such different bridging atoms significantly affect the crystallinity, extinction coefficient, electron mobility of the polymer acceptors, and the morphology and mechanical robustness of related active layers. In all-polymer solar cells (all-PSCs), these polymer acceptors achieved high power conversion efficiencies (PCEs) over 8.0%, while PF2-DTSi obtained the highest PCE of 10.77% due to its improved exciton dissociation, charge transport, and optimized morphology. Moreover, the PF2-DTSi-based active layer showed excellent mechanical robustness with a high toughness value of 9.3 MJ m−3 and a large elongation at a break of 8.6%, which is a great advantage for the practical applications of flexible devices. As a result, the PF2-DTSi-based flexible all-PSC retained >90% of its initial PCE (6.37%) after bending and relaxing 1,200 times at a bending radius of ∼4 mm.

mechanical robustness

flexible solar cells

polymer acceptor

power conversion efficiency

dithienosilole

all-polymer solar cells

Författare

Qunping Fan

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Centro de Investigación en Materiales Avanzados S.C. (CIMAV)

Wenyan Su

Centro de Investigacion en Materiales Avanzados

Jinan University

Chalmers, Kemi och kemiteknik

Shanshan Chen

Chongqing University

Ulsan National Institute of Science and Technology (UNIST)

Centro de Investigacion en Materiales Avanzados

Wansun Kim

Korea Advanced Institute of Science and Technology (KAIST)

Xiaobin Chen

Soochow University

Byongkyu Lee

Ulsan National Institute of Science and Technology (UNIST)

Tao Liu

Hong Kong University of Science and Technology

Ulises Mendez Romero

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Ergang Wang Group

Centro de Investigacion en Materiales Avanzados

Ruijie Ma

Hong Kong University of Science and Technology

Tao Yang

Universidade de Aveiro

Wenliu Zhuang

Guangdong Industry Polytechnic

Yu Li

Guangdong Industry Polytechnic

Yaowen Li

Soochow University

Taek Soo Kim

Korea Advanced Institute of Science and Technology (KAIST)

Lintao Hou

Jinan University

Changduk Yang

Ulsan National Institute of Science and Technology (UNIST)

He Yan

Hong Kong University of Science and Technology

Donghong Yu

Sino-Danish Center for Education and Research (SDC)

Aalborg Universitet

Ergang Wang

Zhengzhou University

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Ergang Wang Group

Joule

25424351 (eISSN)

Vol. 4 3 658-672

Ämneskategorier

Polymerkemi

Textil-, gummi- och polymermaterial

Materialkemi

DOI

10.1016/j.joule.2020.01.014

Mer information

Senast uppdaterat

2020-08-19