Synthesis of medium bandgap copolymers based on benzotriazole for non-fullerene organic solar cells

Ma, Shanshan1; Song, Yu1; Wang, Zhenfeng1; He, Baitian1; Yang, Xiye1; Li, Li1; Xu, Baomin2; Zhang, Jie1; Huang, Fei1; Cao, Yong1

2019-09-28

10.1016/j.polymer.2019.121580

POLYMER   影响因子和分区

0032-3861

1873-2291

Three new copolymer donors based on DCN-alt FTAZ PT-68, PT-810-H, and PT-810-L were synthesized by adjusting the alkyl chains and molecular weight. The copolymers showed deep highest occupied molecular orbital (HOMO) levels of about - 5.50 eV due to introducing fluorine atoms and cyano electron-withdrawing groups. Therefore, devices based on the copolymers as donors and ITIC as acceptors had high open-circuit voltages (V-OC) exceeding 1.00 V. Due to a dicyanodistyrylbenzene (DCN) unit providing rigid and extended conjugation and reducing the backbone torsion, the blended films had high hole mobility values of about 2.50 x 10(-3) cm(2) V-1 s(-1). Devices with the PT-810: ITIC blended film had the highest power conversion efficiency (PCE) of 7.03%, with an open-circuit voltage of 1.04 V, a short-circuit current density of 12.25 mA/cm(2), and a fill factor of 55%. These results provide guidance for the design of high-efficiency photovoltaic materials.

Benzotriazole Donor materials Polymer solar cells

SCI ; EI

英语

其他

Shenzhen Science and Technology Innovation Committee[KQTD2015033110182370]

Polymer Science

Polymer Science

WOS:000487254600051

ELSEVIER SCI LTD

20192907208770

Efficiency ; Hole mobility ; Molecular orbitals ; Open circuit voltage ; Polymer solar cells

Semiconducting Materials:712.1 ; Physical Chemistry:801.4 ; Production Engineering:913.1

CHEMISTRY

Web of Science

1.South China Univ Technol, Inst Polymer Optoelect Mat & Devices, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China

Ma, Shanshan,Song, Yu,Wang, Zhenfeng,et al. Synthesis of medium bandgap copolymers based on benzotriazole for non-fullerene organic solar cells[J]. POLYMER,2019,179.

Ma, Shanshan.,Song, Yu.,Wang, Zhenfeng.,He, Baitian.,Yang, Xiye.,...&Cao, Yong.(2019).Synthesis of medium bandgap copolymers based on benzotriazole for non-fullerene organic solar cells.POLYMER,179.

Ma, Shanshan,et al."Synthesis of medium bandgap copolymers based on benzotriazole for non-fullerene organic solar cells".POLYMER 179(2019).