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Angew: Nearly 19% Efficient! Electron Configuration Tuning of Centrally Extended Non-Fullerene Acceptors for Organic Solar Cells

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Angew: Nearly 19% Efficient! Electron Configuration Tuning of Centrally Extended Non-Fullerene Acceptors for Organic Solar Cells Angew:效率近19

In the molecular optimization of non-fullerene acceptors (NFAs), extending the central core can tune energy levels, reduce non-radiative energy losses, enhance intramolecular (donor-acceptor and acceptor-acceptor) stacking, facilitate charge transfer, and improve device performance. In this study, Prof. Chen Yongsheng from Nankai University, Bin Kan, Cheng Zhong from Wuhan University adopted a new strategy to synthesize acceptors with conjugated electron-deficient extended cores.

Among them, the acceptor CHBBQ embedding benzobisthiadiazole exhibited optimal original fibril network morphology, enhanced crystallinity, and improved charge generation/transport in the blend films, leading to a high power conversion efficiency of 18.94% for ternary organic solar cells based on CH-BBQ (18.19% for binary OSCs) attributed to its delicate structural design and electronic configuration tuning.

The researchers systematically investigated the impacts of the central electron-deficient core on acceptor properties and device performance using experimental and theoretical methods. Modulating electron-deficient cores for NFAs opens new avenues for molecular engineering and promotes related research.

The measurements in this study were performed using Enlitech SS-F5-3A products.

This article was published on August 30, 2023. The original source is Knowledge Valley.

Angew: Nearly 19% Efficient! Electron Configuration Tuning of Centrally Extended Non-Fullerene Acceptors for Organic Solar Cells Untitled 1 2
Angew: Nearly 19% Efficient! Electron Configuration Tuning of Centrally Extended Non-Fullerene Acceptors for Organic Solar Cells Untitled 3 2

Tainan Duan, et al, Electronic Configuration Tuning of Centrally Extended Non Fullerene Acceptors Enabling Organic Solar Cells with Efficiency Approaching 19%, Angew. Chem. Int. Ed. 2023, e202308832

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