Patent ID: 8968885
Filing Date: 2015-03-03
Classification: C07D,C07F,C08G,C08L,C09B,C09D,H01L,Y02E,Y10S

Abstract:
1. A device comprising: at least one cathode; at least one anode; at least one photovoltaic active layer disposed between the cathode and anode and comprising at least one p-type material and at least one n-type material, wherein the p-type material comprises at least one polymer comprising a donor-acceptor structure, comprising a first acceptor backbone moiety: wherein R comprises optionally substituted alkyl, optionally substituted linear alkyl, optionally substituted branched alkyl, optionally substituted aryl, optionally substituted alkylaryl, optionally substituted arylalkyl, optionally substituted alkoxy, or optionally substituted aryloxy, and wherein the donor comprises at least one benzodithiophene structure, and the polymer comprises at least one second acceptor other than (I), wherein the second acceptor other than (I) comprises a benzothiadiazole structure, wherein the polymer is represented by: wherein the R groups of the benzodithiophene structures are alkyl groups, and wherein the R group of the formula (I) structure is as previously defined, and wherein n is adapted to provide the polymer with a number average molecular weight of at least 10,000, and wherein x and y are adapted to provide the polymer with a molar amount of 55-75% of the first acceptor having the formula (I) structure and a molar amount of 25-45% of the second acceptor having the benzothiadiazole structure relative to the total molar amount of the combined first and second structure.