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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.49 [2011] >
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
Fluorescence
Quenching |
| 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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