Unique W-Shape Y6 isomer as effective solid additive for High-Performance PM6:Y6 polymer solar cells

Deng, Min; Meng, Huifeng; Xu, Xiaopeng; Tang, Jie; Yu, Liyang; Li, Ruipeng; Peng, Qiang

doi:10.1016/j.cej.2022.135975

Title: Unique W-Shape Y6 isomer as effective solid additive for High-Performance PM6:Y6 polymer solar cells

Journal Article · Wed Mar 23 00:00:00 EDT 2022 · Chemical Engineering Journal

DOI:https://doi.org/10.1016/j.cej.2022.135975· OSTI ID:1890206

Deng, Min ^[1]; Meng, Huifeng ^[1]; Xu, Xiaopeng ^[1]; Tang, Jie ^[1]; Yu, Liyang ^[1]; Li, Ruipeng ^[2];

^[1]

Sichuan Univ., Chengdu (China)
Brookhaven National Lab. (BNL), Upton, NY (United States)

The current top-performing polymer solar cell (PSC) systems are mostly based on PM6:Y6 host blend. To date, numerous materials have been explored as the third component for these systems to form ternary blends or as additives. Vitrification agents are a group of additives proved to be useful in affecting the morphology of organic semiconductors. Here to design a suitable vitrification agent for non-fullerene electron acceptor Y6, an isomer strategy was explored where the thienothiophene wings of the Y6 molecule were inversed to form a W-shaped Y6 isomer of i-Y6. It was found that i-Y6 crystallized poorly with a different packing style than Y6 and could blend well in amorphous phase of Y6. These properties enabled i-Y6 to finely tune the morphology of PM6:Y6 blend at low additive dosages. The power conversion efficiency (PCE) of PM6:Y6 based PSC was raised from 16.827% to 17.433% at a dosage of Y6:i-Y6 ratio of 24:1. This work demonstrated isomerization as a viable strategy for developing solid additives for high performance PSC blends and vitrification agents as effective additives for tuning morphology and improving performances of PSCs.

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Research Organization:: Brookhaven National Lab. (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC); Foundation of State Key Laboratory of Polymer Materials Engineering; Fundamental Research Funds for the Central Universities

Grant/Contract Number:: SC0012704; 21825502; 22075190; 21905185; 22105135; 2020ZYD004; SKLPME 2017-2-04

OSTI ID:: 1890206

Report Number(s):: BNL-223512-2022-JAAM

Journal Information:: Chemical Engineering Journal, Vol. 440; ISSN 1385-8947

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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