Title :
Charge carrier generation and exciton quenching at M3EH-PPV/small-molecule and M3EH-PPV/oxide interfaces
Author :
Brown, K.E. ; Breeze, A.J. ; Rumbles, G. ; Gregg, B.A. ; Parilla, P.A. ; Perkins, J.D. ; Tillman, H. ; Hörhold, H.H. ; Ginley, D.S.
Author_Institution :
Dept. of Phys., Colorado Sch. of Mines, Golden, CO, USA
Abstract :
The need for efficient exciton dissociation is one of the most important factors limiting improved efficiencies in organic photovoltaic devices. Using luminescence as a probe, we studied the quenching of excitons in semiconducting polymers for a variety of quenching materials, including transparent conducting oxides (TCOs) and small molecule perylene diimide thin films. Perylene benzimidazole (PBI) is shown to be the best quencher of those studied. This result is consistent with the improved conversion efficiencies demonstrated when this material is used in a polymer bilayer photovoltaic device.
Keywords :
conducting polymers; excitons; organic semiconductors; photovoltaic effects; radiation quenching; solar cells; M3EH-PPV/oxide interfaces; M3EH-PPV/small-molecule interface; PBI; TCOs; charge carrier generation; conversion efficiency; efficiency; exciton dissociation; exciton quenching; organic photovoltaic devices; perylene benzimidazole; polymer bilayer photovoltaic device; semiconducting polymers; small molecule perylene diimide thin films; transparent conducting oxides; Charge carriers; Conducting materials; Excitons; Luminescence; Photovoltaic systems; Polymer films; Probes; Semiconductivity; Semiconductor materials; Solar power generation;
Conference_Titel :
Photovoltaic Specialists Conference, 2002. Conference Record of the Twenty-Ninth IEEE
Print_ISBN :
0-7803-7471-1
DOI :
10.1109/PVSC.2002.1190819
