کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1605191 | 1516205 | 2016 | 5 صفحه PDF | دانلود رایگان |
• Cu2ZnSn1−xGexS4 (CZTGS) is fabricated on TCO-coated glass substrates.
• Bandgap is controlled by the Ge/(Sn + Ge) composition ratio.
• Efficiency is 2.4% with an optimal bandgap for double-junction solar cells.
Multi-junction solar cells made up of only non-toxic and earth-abundant elements can solve both energy and environmental problems. We fabricated Cu2ZnSn1−xGexS4 (CZTGS) solar cells on transparent-conductive-oxide (TCO)-coated glass substrates in order to use them as top-cells. We investigated the relationship between the bandgap and the Ge/(Sn + Ge) composition ratio of the CZTGS thin films. The bandgap increased with an increase in the Ge/((Sn + Ge)) composition ratio. We also fabricated a CZTGS solar cell with a bandgap of 1.8 eV with a Ge/(Sn + Ge) composition ratio of 0.69, which is close to the optimal bandgap for the top-cells of double-junction solar cells. A maximum conversion efficiency of 2.4% was exhibited by the cell fabricated on TCO with a bandgap of 1.8 eV.
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Journal: Journal of Alloys and Compounds - Volume 689, 25 December 2016, Pages 713–717