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论文类型：期刊论文

发表时间：2022-06-29

发表刊物：大连理工大学学报

期号：5

页面范围：499-505

ISSN号：1000-8608

摘要：A novel D-π-A-π-D type small-molecule photovoltaic (PV)material FLEBT is designed and synthesized successfully, which uses alkyl-substituted fluorene as donor (D ) unit, benzothiadiazole as acceptor (A)unit and triple bond asπ-linkage.The structure is characterized with NMR and HRMS.The optical and electrochemical properties of FLEBT are investigated by UV-Vis absorption spectroscopy and cyclic voltammetry experiments.These experimental results exhibit that FLEBT has excellent solubility and film-forming properties in organic solvents, strongly intramolecular charge transfer (ICT)feature,a broad absorption range in UV-Vis absorption spectra and appropriate energy levels relatively to acceptor material PC61 BM.The PV properties of solution-processed bulk heteroj unction (BHJ ) solar cells are investigated by using FLEBT as donor and PC61 BM as acceptor.As a preliminary result,it reveals a performance with a Voc of 0.72 V,a Jsc of 0.93 mA·cm-2 ,and a power conversion efficiency (PCE)of 0.18% under an illumination of AM 1.5 G (100 mW·cm-2 ).As a result,this kind of small-molecule is a potential organic small-molecule PV material.

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