Controlling Molecular Mass of Low-Band-Gap Polymer Acceptors for High-Performance All-Polymer Solar Cells

作者:Wang, W (Wang, Wei)[ 1 ] ; Wu, Q (Wu, Qiang)[ 1 ] ; Sun, R (Sun, Rui)[ 1 ] ; Guo, J (Guo, Jing)[ 1 ] ; Wu, Y (Wu, Yao)[ 1 ] ; Shi, MM (Shi, Mumin)[ 1 ] ; Yang, WY (Yang, Wenyan)[ 1 ] ; Li, HN (Li, Hongneng)[ 1 ] ; Min, J (Min, Jie)[ 1,2,3 ]

JOULE

卷: 4 期: 5 页: 1070-1086

DOI: 10.1016/j.joule.2020.03.019

出版年:MAY 20 2020

文献类型:Article

摘要

Recent advances in the development of polymer acceptors and the investigation of molecular mass have boosted the power conversion efficiency (PCE) of all-polymer solar cells (all-PSCs) to approximately 11%. Here, a fused-aromatic-ring-constructed polymer acceptor PYT (Poly[(2,2'-((2Z,2'Z)-(( 12,13-bis(2-octyldodecyl)-3,9-diundecyl12,13-dihydro[1,2,5]thiadiazolo[3,4e]thieno[2 '/info/1033/',3 '' :40,50]thieno[2',3':4,5] pyrrolo[3,2-g]thieno[2',3' :4,5]thieno[3,2-b]-indole-2,10-diyl)bis(methanylylidene))bis(3-oxo-2,3-dihydro-1H-indene-2,1-diylidene)) dimalononitrile-alt-2,5-thiophene)]) is reported, while a series of PYT polymers with different molecular masses (designated as PYTL, PYTM, and PYTH) are prepared to fine-tune the molecular crystallinity and miscibility. Benefiting from the advantages of PYT series, which possess broad absorption with a narrow band of 1.40-1.44 eV and high absorption coefficients of over 1.00 3 105 cm(-1), we investigated the blend miscibility and device performance of all-PSCs based on a wide-bandgap polymer donor, PM6. The PYTM-based all-PSCs exhibit an excellent PCE of 13.44%, outperforming those with PYTL (12.55%) and PYTH (8.61%). Our results provide insight into polymer acceptor backbone and molecular mass and suggest guidelines to rationally select polymers for all-PSCs.

关键词

KeyWords Plus:POWER CONVERSION EFFICIENCY; PHOTOVOLTAIC CELLS; CONJUGATED POLYMER; ELECTRON-DONOR; ENERGY-LOSSES; AGGREGATION; MORPHOLOGY; WEIGHT; ABSORPTION; UNIT

作者信息

通讯作者地址:

Wuhan University Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China.

Chinese Academy of Sciences Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China.

Zhengzhou University Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450002, Peoples R China.

通讯作者地址: Min, J (通讯作者)

Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China.

通讯作者地址: Min, J (通讯作者)

Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China.

通讯作者地址: Min, J (通讯作者)

Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450002, Peoples R China.

地址:

[ 1 ]‎ Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China

[ 2 ]‎ Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China

[ 3 ]‎ Zhengzhou Univ, Minist Educ, Key Lab Mat Proc & Mold, Zhengzhou 450002, Peoples R China

电子邮件地址:min.jie@whu.edu.cn