BENZODITHIOPHENE BASED COPOLYMER CONTAINING THIENO 3,4-BTHIOPHENE UNITS AND PREPARING METHOD AND APPLICATIONS THEREOF

摘要

The present invention relates to a benzodithiophene based copolymer containing thieno [3,4-b] thiophene units and a preparing method and applications thereof. The polymer has a structural formula (I), wherein R 1 and R 2 are respectively selected from H, and alkyl groups of C 1 to C 16 ; R 3 and R 4 are respectively selected from H, alkyl groups of C 1 to C 16 , alkoxy groups of C 1 to C 16 , or thiophene groups substituted by alkyl groups of C 1 to C 16 ; R 5 is selected from alkyl groups of C 1 to C 16 ; n is a natural number from 7 to 80. Applications of the benzodithiophene based copolymer containing thieno [3,4-b] thiophene units in polymer solar cells, polymer organic light-emission, polymer organic field effect transistors, polymer organic optical storage, polymer organic nonlinear materials or polymer organic laser are also provided.