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A thienopyrrole-based small molecule acceptor material and its preparation and application

A small-molecule acceptor and diketopyrrole-type technology, which is applied in semiconductor/solid-state device manufacturing, electrical solid-state devices, semiconductor devices, etc., can solve the problems affecting the photogenerated current of devices and the absorption of active layer materials

Active Publication Date: 2020-09-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on high-efficiency small molecule acceptor materials based on medium band gaps, which will affect the absorption of active layer materials at 400-600 nm, thereby affecting the photogenerated current of the device.

Method used

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  • A thienopyrrole-based small molecule acceptor material and its preparation and application
  • A thienopyrrole-based small molecule acceptor material and its preparation and application
  • A thienopyrrole-based small molecule acceptor material and its preparation and application

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Embodiment 1

[0083] Thienopyrrole diketone (EHTPDThRCN) based on the present embodiment 2 The structural formula of BT small molecule acceptor material:

[0084]

[0085] Its synthetic steps are as follows:

[0086] Synthesis of Step 1 compound 4,7-dibromobenzo[c][1,2,5]thiadiazole

[0087]

[0088] Add benzo[c][1,2,5]thiadiazole (10g, 0.073mol) to 150mL hydrobromic acid solution (8.7mol / L hydrobromic acid solution), and slowly add it with a constant pressure dropping funnel Liquid bromine (25.66g, 0.1606mol), after the addition, the reaction was refluxed at 130°C for 12h, after cooling, slowly add sodium hydroxide solution under ice bath conditions, adjust the pH to about 7, then add dichloromethane and Extract with distilled water, dry the organic layer with anhydrous magnesium sulfate, filter, distill off the solvent under reduced pressure, and then separate with a silica gel column. The eluents are petroleum ether and dichloromethane to obtain 19.7 g of light yellow crystals, w...

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Abstract

The invention belongs to the technical field of organic semiconductor materials, and discloses a thienopyrrole-based small molecule acceptor material and its preparation and application. The thienopyrrole-based small molecule acceptor material of the present invention has a structure of A 2 -π-A 1 -π-A 2 , A 1 It is an electron-withdrawing unit, and its structure is as follows, where R is any one of an alkyl chain or an alkoxy chain with a carbon number of 1 to 12; Ar is an electron-withdrawing unit; A 2 is an electron-withdrawing terminal group, and π is a group containing a thiophene structure. The invention also discloses a preparation method of the material. The material of the present invention is simple to synthesize and purify, has good solubility, film-forming property, film shape stability and electron mobility, and the small molecule acceptor material has good miscibility with COi8DFIC, in solar cell devices, as Receptors have important application prospects.

Description

technical field [0001] The invention belongs to the technical field of organic semiconductor materials, relates to a preparation method of organic semiconductor materials, in particular to a thienopyrrole diketone A 2 -π-A 1 -π-A 2 Structured small molecule acceptor material (organic small molecule electron transport material) and its preparation method and application. Background technique [0002] Organic semiconductor materials have been used in organic light-emitting diodes (OLEDs) in recent years S ), Organic Thin Film Transistor (OFET S ), organic thin film solar cells (OPV S ) and other fields are developing rapidly and have important application prospects. Fullerenes, as electron acceptors, are widely used in the research of OPV devices, but they are difficult to modify. Common fullerene derivatives PC 61 BM and PC 71 BM absorbs weakly in the visible region. Non-fullerene acceptor materials have the characteristics of various structures and strong absorption...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D519/00H01L51/46
CPCC07D519/00H10K85/655H10K85/656H10K85/657Y02E10/549
Inventor 朱旭辉罗豆曹镛
Owner SOUTH CHINA UNIV OF TECH
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