Alumina capped ZnO quantum dots multilayer grown by pulsed laser deposition |
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Authors: | S Barik AK SrivastavaP Misra RV NandedkarLM Kukreja |
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Institution: | a Thin Film Laboratory, Centre for Advanced Technology, Indore 452 013, India b Synchrotron Utilization Division, Centre for Advanced Technology, Indore 452 013, India |
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Abstract: | To extend the applicability of ZnO, with the bulk band gap of about 3.3 eV, into deep UV region, we have grown a multilayer of alumina capped ZnO quantum dots of mean in-plane sizes in the range of ∼1.8-3.6 nm at room temperature using alternate Pulsed Laser Deposition. Size dependent blue shift of the band gap of these dots up to ∼4.5 eV is observed in the optical absorbance spectra. The observed blue shift can be understood using the effective mass approximation in weak and strong confinement regimes. |
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Keywords: | 42 70 &minus a 81 05 Dz 81 15 Fg |
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