Novel low-band gap non-fullerene acceptors based on IDIC core as potential photovoltaic materials

IF 1.7 4区 化学 Bulletin of the Korean Chemical Society Pub Date : 2024-08-21 DOI:10.1002/bkcs.12891
Radhiha Ravindran, Inchan Kim, Yun-Hi Kim, Soon-Ki Kwon
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Abstract

Three novel non-fullerene acceptors (NFAs) (PhBu-IDT-BT-IC, PhBu-IDT-BT-IC4F and PhBu-IDT-BT-IC4Cl) based on 3,8-dioctyl-indaceno[1,2-b:5,6-b’]dithiophene (IDT) core have been designed and synthesized with and without halogen (F and Cl) substitution. The NFAs showed high thermal stability. The ultraviolet–visible absorption studies in solution and thin film for the three acceptors revealed maximum absorption from 687 to 732 nm and 731 to 847 nm, respectively. The onset of absorption in the thin film was found to be extending up to around 960 nm for PhBu-IDT-BT-IC4Cl. The optical band gap ranged from 1.30 to 1.41 eV, which are very low and useful for photovoltaic application. The introduction of halogen appreciably altered the LUMO energy levels, whereas the HOMO energy levels were nearly intact. These small molecule non-fullerene acceptors could be used as potential acceptors in bulk heterojunction organic photovoltaic (BHJ-OPV) applications.

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基于 IDIC 内核的新型低带隙非富勒烯受体是潜在的光伏材料
我们设计并合成了三种新型非富勒烯受体(NFAs)(PhBu-IDT-BT-IC、PhBu-IDT-BT-IC4F 和 PhBu-IDT-BT-IC4Cl),它们以 3,8-二辛基-茚并[1,2-b:5,6-b']二噻吩(IDT)为核心,含有或不含卤素(F 和 Cl)。这些 NFAs 具有很高的热稳定性。三种受体在溶液和薄膜中的紫外可见吸收研究显示,最大吸收波长分别为 687 至 732 纳米和 731 至 847 纳米。发现 PhBu-IDT-BT-IC4Cl 在薄膜中的吸收起始波长可达 960 纳米左右。光带隙在 1.30 至 1.41 eV 之间,非常低,可用于光伏应用。卤素的引入明显改变了 LUMO 能级,而 HOMO 能级几乎保持不变。这些小分子非富勒烯受体可用作体异质结有机光伏(BHJ-OPV)应用中的潜在受体。
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来源期刊
Bulletin of the Korean Chemical Society
Bulletin of the Korean Chemical Society Chemistry-General Chemistry
自引率
23.50%
发文量
182
期刊介绍: The Bulletin of the Korean Chemical Society is an official research journal of the Korean Chemical Society. It was founded in 1980 and reaches out to the chemical community worldwide. It is strictly peer-reviewed and welcomes Accounts, Communications, Articles, and Notes written in English. The scope of the journal covers all major areas of chemistry: analytical chemistry, electrochemistry, industrial chemistry, inorganic chemistry, life-science chemistry, macromolecular chemistry, organic synthesis, non-synthetic organic chemistry, physical chemistry, and materials chemistry.
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