A chlorinated polymer promoted analogue co-donors for efficient ternary all-polymer solar cells

Chen, Hui; Guo, Yikun; Chao, Pengjie; Liu, Longzhu; Chen, Wei; Zhao, Dahui; He, Feng

doi:10.1007/s11426-018-9371-0

A chlorinated polymer promoted analogue co-donors for efficient ternary all-polymer solar cells

Journal Article · Fri Nov 09 00:00:00 EST 2018 · Science China Chemistry

DOI:https://doi.org/10.1007/s11426-018-9371-0· OSTI ID:1496595

Chen, Hui ^[1]; Guo, Yikun ^[2]; Chao, Pengjie ^[1]; Liu, Longzhu ^[1]; Chen, Wei ^[3]; Zhao, Dahui ^[2]; He, Feng ^[1]

Southern Univ. of Science and Technology, Shenzhen (China)
Peking Univ., Beijing (China)
Argonne National Lab. (ANL), Lemont, IL (United States); The Univ. of Chicago, Chicago, IL (United States)

The efficient ternary all-polymer solar cells (PSCs) are designed and fabricated, using a polymer acceptor of NDP-V-C₇ and analogue co-donors containing a chlorinated polymer PBClT and classical PTB₇-Th. PBClT and PTB₇-Th possess very similar chemical structure and matched energy levels to form the cascade of the co-donors. Meanwhile, benefiting from those analogous polymer structures, there is little influence of the morphology in blend film compared to their pristine polymer films. The binary PBClT:NDP-V-C₇ devices exhibit a high open-circuit voltage (Voc) due to the deep HOMO level of PBClT. The V_oc of all-PSCs could be finely manipulated by adjusting the content of PBClT in blend film. The ternary all-PSCs have the more balanced charge mobility and prolonged carrier lifetime compared to the binary devices. The PBClT also help improve the miscibility of ternary blend and suppress crystallization in films, bringing about favorable morphology with appropriate orientation and surface roughness in blend film. With the optimal processing, the champion ternary all-PSCs obtain a high PCE of 9.03%, which is about 10% enhancement compared to that of binary device. Finally, the results indicate that the ternary approach using analogue co-donors is a practical method to enhance the performance of all-PSCs.

View Accepted Manuscript (DOE)

Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Natural Science Foundation of China; South University of Science and Technology of China (SUSTC); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1496595

Alternate ID(s):: OSTI ID: 22960291

Journal Information:: Science China Chemistry, Journal Name: Science China Chemistry Journal Issue: 2 Vol. 62; ISSN 1674-7291

Publisher:: Science China Press and SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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A chlorinated polymer promoted analogue co-donors for efficient ternary all-polymer solar cells

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References (48)

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