US 12,239,015 B2
Energy sensitization of acceptors and donors in organic photovoltaics
Mark E. Thompson, Anaheim, CA (US); Cong Trinh, Los Angeles, CA (US); Peter I. Djurovich, Long Beach, CA (US); and Sarah M. Conron, Los Angeles, CA (US)
Assigned to University of Southern California, Los Angeles, CA (US)
Filed by University of Southern California, Los Angeles, CA (US)
Filed on Jul. 30, 2019, as Appl. No. 16/526,083.
Application 16/526,083 is a continuation of application No. 14/433,046, granted, now 10,367,157, previously published as PCT/US2013/063661, filed on Oct. 7, 2013.
Claims priority of provisional application 61/710,504, filed on Oct. 5, 2012.
Prior Publication US 2020/0203638 A1, Jun. 25, 2020
Int. Cl. H01L 51/00 (2006.01); B82Y 10/00 (2011.01); C09B 47/00 (2006.01); C09B 57/10 (2006.01); H01L 51/42 (2006.01); H10K 30/20 (2023.01); H10K 85/20 (2023.01); H10K 85/30 (2023.01); H10K 30/81 (2023.01); H10K 50/11 (2023.01); H10K 101/30 (2023.01); H10K 101/40 (2023.01)
CPC H10K 85/381 (2023.02) [B82Y 10/00 (2013.01); C09B 47/00 (2013.01); C09B 57/10 (2013.01); H10K 30/20 (2023.02); H10K 85/211 (2023.02); H10K 85/322 (2023.02); H10K 85/342 (2023.02); H10K 30/81 (2023.02); H10K 50/11 (2023.02); H10K 85/215 (2023.02); H10K 85/30 (2023.02); H10K 2101/30 (2023.02); H10K 2101/40 (2023.02); Y02E 10/549 (2013.01)] 10 Claims
 
1. An organic photosensitive optoelectronic device comprising:
two electrodes in superposed relation;
an organic acceptor layer and a mixed organic donor layer located between the two electrodes;
a buffer layer between one of the two electrodes and the organic acceptor layer; and
a charge transfer layer between the other of the two electrodes and the mixed organic donor layer,
wherein the mixed organic donor layer comprises a mixture of a donor material chosen from phthalocyanines, subphthalocyanines, naphthalocyanines, merocyanine dyes, boron-dipyrromethene (BODIPY) dyes, thiophenes, polyacenes, and squaraine (SQ) dyes and at least one donor sensitizer chosen from subphthalocyanines, porphyrins, phthalocyanines, dipyrrins and metal complexes thereof, boboron-dipyrromethene (BODIPY) dyes, squaraines, oligothiophenes, and acenes and derivatives thereof, wherein the donor material and the at least one donor sensitizer are chosen to satisfy the following conditions:
the at least one donor sensitizer has a lowest triplet excited state energy (ET-DSens) greater than or equal to a lowest triplet excited state energy (ET-D) of the donor material;
the at least one donor sensitizer has an oxidation potential greater than or equal to an oxidation potential of the donor material; and
if the at least one donor sensitizer and the donor material form a charge transfer (CT) state having a CT state energy, the CT state energy is greater than or equal to the lowest triplet excited state energy (ET-D) of the donor material,
wherein the at least one donor sensitizer results in an unaltered short circuit current (JSC) and an increase in power conversion efficiency (ηp).