Conjugated polymer compound comprising 1,2,3-Benzothiadiazole units and its use in photovoltaic devices

摘要

The present invention relates to a polymer compound and a photovoltaic conversion device using the same having the general formula (I'):wherein R1 and R2 are the same or mutually different and represent a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an alkylthio group, a cyano group or a nitro group,R3 represents a halogen atom, an alkyl group, an alkoxy group, an alkylthio group, an acyl group, an acyloxy group, a carboxyl group, a substituted carboxyl group, a cyano group or a nitro group,R4, R5 and R6 are the same or mutually different and represent a hydrogen atom, an alkyl group, an alkoxy group, or an alkylthio group,X representswherein Y = CR7R8 or N-R9,k is a number of linearly linked thiophene units integrated in the repeating unit, preferably an integer from 0 to 2,n is the number of repeating units, preferably from 2 to 2000,R7, R8, R9 are the same or mutually different and represent an alkyl group, an aryl group, an arylalkyl group, an arylalkenyl group, an arylalkynyl group, a heterocyclic group, preferably a mono-valent heterocyclic group, a heterocyclic group with at least one sulphur atom, and EG-1 and EG-2 are the end groups of the polymer compound and independent from each other are represented by a hydrogen, a halogen, a trialkylstannyl (-Sn(Alkyl)3), a boronic acid (-B(OH)2), a boronic ester (-B(OAlkyl)2), an aryl or a heteroaryl unit.