Solution growth of chalcopyrite Cu(In1−x
Ga
x
)Se2 single crystals for high open-circuit voltage photovoltaic device
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Abstract I–III–VI2 Chalcopyrite Cu(In1−x Ga x )Se2 (CIGS) has attracted attention as absorbing layer in photovoltaic (PV) device. In this study, we investigated the fundamental properties of CIGS single crystals, and fabricated single crystal-based PV device. CIGS single crystals without secondary phase were successfully grown by In-solvent traveling heater method (THM). The conversion of conduction type from n- to p-type can be observed above 0.3 of Ga ratio x because of high acceptor defect concentration. PV device based on high-quality CIGS bulk single crystal demonstrates high open-circuit voltage of 0.765 V with the efficiency of 12.6%.
2015 ◽
Vol 5
(6)
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pp. 1757-1761
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2009 ◽
Vol 48
(24)
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pp. 4402-4405
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2014 ◽
Vol 130
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pp. 561-566
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2021 ◽
Vol 39
(1)
◽
pp. 012409