Title: Enhanced photovoltaic response of organic solar cell by singlet-to-triplet exciton conversion
Authors: Yang, Chia-Ming
Wu, Chi-Hui
Liao, Hua-Hsin
Lai, Kuei-Yuan
Cheng, Hong-Ping
Horng, Sheng-Fu
Meng, Hsin-Fei
Shy, Jow-Tsong
Institute of Physics
Issue Date: 26-Mar-2007
Abstract: Ir complex was doped to conjugated polymers, and the photoinduced absorption of triplet excitons in host materials was examined. A greatly enhanced intersystem crossing rate was observed, despite the decrease in triplet exciton lifetime. The authors find that the steady-state triplet exciton population in host polymer would increase by an order of magnitude. Conjugated polymer/colloidal CdSe nanocrystal hybrid solar cells were fabricated and the effect of Ir-complex doping on photovoltaic response was studied. It was found that due to the enhanced singlet-to-triplet conversion, greatly enhanced photovoltaic response of these hybrid organic solar cells was observed. The results suggest that triplet solar cells may be achieved by doping conventional photovoltaic materials with transition-metal complexes. (c) 2007 American Institute of Physics.
URI: http://dx.doi.org/10.1063/1.2716209
ISSN: 0003-6951
DOI: 10.1063/1.2716209
Volume: 90
Issue: 13
End Page: 
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