A-D-A type organic small molecule and preparation and application thereof

An A-D-A, small molecule technology, used in organic chemistry, semiconductor/solid-state device manufacturing, photovoltaic power generation, etc., can solve problems such as low solar cell efficiency, achieve high yield, and avoid the formation of unilateral by-products.
CN109096312AInactive Publication Date: 2018-12-28HANGZHOU NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HANGZHOU NORMAL UNIVERSITY
Publication Date
2018-12-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an A-D-A type organic small molecule and the preparation and an application thereof. Dithiophene-pyrrole is utilized as a core, and thiophthene (TT) or monothiophene is used asnovel A-D-A type small molecule DINTTDTS and DINDTS of different Pi-bridges. The DINTTDTS and the DINDTS are used as donors to prepare all-small molecule solar cells that can be subjected to solutiontreatment. A DINDTS-based device has the energy conversion efficiency of 4.52%, the current density (Jsc) of 19.96 mAcm^2 and the fill factor (FF) of 57.5%. However, a DINTTDTS-based device has the energy conversion efficiency of 2.79%, the Jsc of 8.98 mA cm^2 and the FF of 39.5%.
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Description

technical field

[0001] The invention relates to a synthesis method of an A-D-A type organic photovoltaic small molecule and a research on the photovoltaic performance of an all-small molecule organic solar device based on a solution-processable small molecule donor material. Background technique

[0002] Fullerenes and their derivatives are often used as acceptor materials in organic solar cells, but fullerenes and their derivatives have weak spectral absorption in the visible-near infrared, high cost, difficult storage, and difficult optical and electrical properties. Defects such as coordination greatly limit the application and further improvement of the efficiency of organic solar cells based on fullerene acceptor materials. Therefore, non-fullerene acceptor materials with higher absorption coefficient, adjustable energy level and relatively low cost are more and more favored by researchers. In recent years, through the design and improvement of non-fullerene acceptor m...

Claims

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