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• W4323832108 abstract "Molybdenum oxide (MoO3−x, x < 3) has been successfully used as an efficient hole-selective contact material for crystalline silicon heterojunction solar cells. The carrier transport capability strongly depends on its work function, that is, oxygen vacancies; however, there are lack of effective methods to modulate the multiple oxidation states. Herein, the oxidation states of solution-processed MoO3−x by doping Nb5+ to improve its hole-selective contact performance with silicon are tuned. With the optimum doping concentration of 5%, both the reduced Mo5+ and oxygen vacancies increase, resulting in a decrease in the contact resistivity between the MoO3−x film and p-type silicon from 161.1 to 62.9 mΩ·cm2 and an increase of the effective carrier lifetime from 165.4 to 391.0 μs simultaneously. Similarly, the doping of Ta5+ or V5+ in MoO3−x improves the passivated contact performance with silicon, while the former increases the concentration of oxygen vacancies and the latter reduces it. The solar cell with the structure of Ag/MoO3−x:Nb/p-Si exhibits a conversion efficiency of 18.37%, which is the highest so far reported for the solution-processed MoO3−x/silicon heterojunction. This work demonstrates a feasible strategy of tuning hole selectivity in MoO3−x by doping for high-efficiency solar cells and other optoelectronic device applications." @default.
• W4323832108 created "2023-03-11" @default.
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• W4323832108 date "2023-03-17" @default.
• W4323832108 modified "2023-10-17" @default.
• W4323832108 title "Tunable Hole‐Selective Transport by Solution‐Processed MoO _{3− <i>x</i>} Via Doping for <i>p</i> ‐Type Crystalline Silicon Solar Cells" @default.
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• W4323832108 doi "https://doi.org/10.1002/solr.202300023" @default.
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