Introducing thiazole units into small-molecule acceptors for efficient non-fullerene organic solar cells

Zeng, Junhao; Jin, Conggui; Shao, Lin; Li, Chunxiang; Li, Renlong; Fan, Baobing; Jen, Alex K.-Y.; Xiong, Liangbing; Zhang, Shaoan; Lv, Yang; Jia, Tao; Xiao, Manjun; Xie, Ruihao

doi:10.1016/j.dyepig.2023.111770

Cited by 1 publication

(1 citation statement)

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“…In our previous study, 47 we developed and synthesized four novel SMAs by introducing electron-withdrawing thiazole units at the γand β-positions of the IC terminal group. These SMAs exhibited strong and broad absorption spectra, with the devices of the ODTz-γ-based device achieving a remarkable PCE exceeding 12%.…”

Section: Introductionmentioning

confidence: 99%

Nonfullerene Acceptors with Aromatic Heterocycle Substitutions for Efficient Organic Solar Cells

Zeng,

Wu,

Ren

et al. 2024

ACS Appl. Energy Mater.

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Modifying the end groups of nonfullerene acceptors presents a viable strategy for enhancing the efficiency of organic solar cells (OSCs). This study synthesized three nonfullerene acceptors�BO-ICTz, BO-ICTzTh, and BO-ICTh�by incorporating aromatic heterocycle substitutions into the end group. These substitutions included an electron-donating thiophene ring, an electron-withdrawing thiazole ring, and a combination of both asymmetric rings. BO-ICTh, exhibiting a stronger conjugation effect, exhibited robust and broad absorption spectra, along with elevated energy levels. When blended with the polymer donor JD40-BDD20, the optimized BO-ICTh-based device achieved a champion power conversion efficiency (PCE) of 16.25%, surpassing devices based on BO-ICTz and BO-ICTzTh. Further analysis of energy loss, charge generation, recombination, and morphology demonstrated that incorporating the aromatic heterocycle ring into the end group presents as a promising strategy for developing nonfullerene acceptors, thereby enhancing the performance of organic photovoltaic devices.

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Section: Introductionmentioning

confidence: 99%