Premium
Organic Solar Cells: On the Effect of Prevalent Carbazole Homocoupling Defects on the Photovoltaic Performance of PCDTBT:PC 71 BM Solar Cells (Adv. Energy Mater. 21/2016)
Author(s) -
Lombeck Florian,
Komber Hartmut,
Fazzi Daniele,
Nava Diego,
Kuhlmann Jochen,
Stegerer Dominik,
Strassel Karen,
Brandt Josef,
de Zerio Mendaza Amaia Diaz,
Müller Christian,
Thiel Walter,
Caironi Mario,
Friend Richard,
Sommer Michael
Publication year - 2016
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201670123
Subject(s) - materials science , carbazole , organic solar cell , photovoltaic system , energy conversion efficiency , fullerene , optoelectronics , exciton , short circuit , energy transformation , nanotechnology , chemical engineering , photochemistry , organic chemistry , polymer , composite material , condensed matter physics , electrical engineering , voltage , thermodynamics , chemistry , physics , engineering
Unintentionally formed carbazole homocouplings occur frequently in the photovoltaic material PCDTBT when made by Suzuki polycondensation resulting in significantly lower power conversion efficiency of PCDTBT/fullerene solar cells. A likely loss mechanism that leads to reduced short circuit currents is exciton localization next to the homocoupling defect. This is reported by Michael Sommer and co‐workers in article number 1601232.