Jana, Sunirmal and Biswas, Prasanta Kumar (2001) Biexcitonic behaviour of 1s yellow exciton in Cu2O microcrystallites embedded in solution derived nano-zirconia film matrix. Proceedings of the Society of Photo-Optical Instrumentation Engineers (SPIE), Photonics 2000: International Conference on Fiber Optics and Photonics , 4417 . 451-460 . ISSN 0277-786X

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Cu2O microcrystallites of the size range 55-73 A were embedded in the nano-zirconia thin film matrix if precursor contains zirconium oxychloride octahydrate and cupric nitrate trihydrate. Absorption and fluorescence spectra of the films annealed at different temperature, 200 degrees -1200 degreesC revealed that the microcrystallites are possessing both mono- and biexcitonic behaviours which are dependent on microcrystallite size. Maximum biexcitonic behaviour has been predicted in the case of 450 degreesC annealed sample (size 69 Angstrom, cal.) which also showed phosphorescence possibly due to inter-crossing of potential energy curve Gamma (+)(1) of Cu2O exciton and D-3 of free Cu+. The anisotropic nature of the excitonic transitions of Cu2O was also observed due to electrical quadrupole transition which was authenticated by its emission and ESR spectral,studies.

Item Type: Article
Additional Information: International Conference on Fiber Optics and Photonics (Photonics 2000) Location: Calcutta, INDIA Date: DEC 18-20, 2000 Sponsor(s): Lucent Technol, Bell Labs; Sterlite Opt Technol Ltd; SPIE; IEEE Elect Device Soc; IEEE Kharagpur Sect, India; Opt Soc India; Minist Informat Technol; Board Res Nucl Sci; Dept Sci & Technol; CSIR
Uncontrolled Keywords: Cu2O Microcrystallites; Biexciton; Nano-zirconia Thin Film Matrix
Subjects: Crystal Chemistry, Thermodynamics, Phase Equilibria
Divisions: Sol Gel
Depositing User: Mrs Chandana Patra
Date Deposited: 22 Mar 2012 12:14
Last Modified: 22 Mar 2012 12:14
URI: http://cgcri.csircentral.net/id/eprint/1342

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