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Transactions: WSEAS TRANSACTIONS ON ENVIRONMENT AND DEVELOPMENT
Transactions ID Number: 42-546
Full Name: Azami Zaharim
Position: Professor
Age: ON
Sex: Male
Address: Solar Energy Research Instiute, Universiti Kebangsaan Malaysia 43600 Bangi, Selangor, MALAYSIA
Country: MALAYSIA
Tel: 60389216843
Tel prefix: 60389216681
Fax: 60389216960
E-mail address: azami.zaharim@gmail.com
Other E-mails: azami@eng.ukm.my
Title of the Paper: A Numerical Analysis on the Effect of Energy Bandgap of Amorphous Silicon Carbide (a-SiC:H) Layer in Amorphous Silicon Based Multijunction Solar Cells
Authors as they appear in the Paper: M. I. KABIR, MOHAMMAD AMINUL ISLAM, AZAMI ZAHARIM, KAMARUZZAMAN SOPIAN & NOWSHAD AMIN
Email addresses of all the authors: nowshad@eng.ukm.my,azami@eng.ukm.my,ksopian@eng.ukm.my
Number of paper pages: 12
Abstract: In this work, single and multijunction amorphous silicon carbide (a-SiC:H) thin film solar cells have been investigated by the Analysis of Microelectronic and Photonic Structures (AMPS 1D) simulator in regard to overall performance. The photovoltaic characteristics have been observed by changing the optical energy bandgap of p-layer and variation of light intensity for single and multijunction devices. For single junction, a good efficiency trend has been found for the window layer energy bandgap of 1.8-2.2 eV and the highest efficiency is achieved to be 17.67% at 2 eV. The highest efficiency of 17.95% has been found at 10 suns. In the case of double junction, the efficiency has been found for the second p-layer energy bandgap of 1.8-2 eV and the highest efficiency is 19.04% at 1.9 eV. In contrast, the maximum efficiency for triple junction solar cells has been found for the bottom cell's p-layer energy bandgap of 1.8-1.9 eV and the highest efficiency is 20.42% at !
1.8 eV. It is evident that the optimum energy bandgap for a-SiC:H as window layers in triple junction configuration is 1.8-2.1 eV. For double and triple junctions, the efficiency has been improved by 21.94% and 25.58% at 30 and 100 suns, respectively. It is evident that solar energy concentration technique which has been applied for these single and multijunction devices by varying the light intensity indicates significant improvement in cells performance.
Keywords: Thin-film, single junction, multijunction, a-SiC:H, bandgap, light intensity and AMPS-1D.
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