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IJPAP Vol.49(07) [July 2011] >

Title: Charge generation and photovoltaic properties of thin film device based on pyronine G:zinc oxide composite
Authors: Rajkumar
Sharma, G D
Roy, M S
Keywords: Photo-induced charge transfer
Bulk heterojunction
Photovoltaic effect
Issue Date: Jul-2011
Publisher: NISCAIR-CSIR, India
Abstract: The electrical and photoelectrical properties of thin film hybrid blend device consisting of nanocrystalline inorganic semiconductor zinc oxide (ZnO) and pyronine G (PYR G) (an organic p-type semiconductor) have been studied through recorded fluorescence (FL) spectra, current-voltage characteristics (in dark and under illumination) and photo-action spectra of device. The quenching of FL spectra of PYR G when mixed with ZnO has been interpreted in terms of efficient electron transfer between PYR G (donor) and ZnO (acceptor) on photoexcitation. The observed results justify the formation of bulk heterojunction between PYR G and ZnO, sandwiched between Al and ITO electrodes. The nearly linear dependence of photocurrent with incident light intensity suggests the efficient photo-induced charge-transfer in the device consisting of PYR G:ZnO restricting charge recombination comparatively to device based on pure PYR G. The absorption spectra of the blend suggest the formation of hetero-junction and there is no ground state doping.
Page(s): 489-493
CC License:  CC Attribution-Noncommercial-No Derivative Works 2.5 India
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.49(07) [July 2011]

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