Performance Enhancement of Large Area Solar Cells by Incorporating Nanophosphors: A ZnOS Demonstrator Solar Cell and Its Efficiency
Final rept. 9 May 2008-16 Dec 2009
NANOCRYSTALS TECHNOLOGY LTD BRIARCLIFF MANOR NY
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High quality ternary ZnO1-xSx 0x0 nanocrystals in the whole composition range were synthesized for the first time by chemical method. The composition dependence 0x0 of band gap, multi-phonon resonant Raman scattering and photoluminescence studies were carried out in detail. The energy band gaps of these ternary ZnO1-xSx0x0 nanocrystals show strong bandgap bowing of 3.7 eV. The photoluminescence efficiency of the ternary nanocrystals is demonstrated in its use for enhancement of photovoltaic cell efficiency. Preliminary results demonstrate a 3 enhancement in the efficiency of ZnOS Demonstrator Solar Cell. To enhance the efficiency further, it is recommended 1 to improve the x values of down-conversion of the ZnO1-xSx 0x0 layers and luminescence activator center and 2 to improve the interface between nanophosphors of Si solar cells, as well as optimizing the thickness in mm to absorb and down conversion efficiently.
- Inorganic Chemistry
- Electrooptical and Optoelectronic Devices
- Electric Power Production and Distribution