Thin-Film Solar Cells with 19% Efficiency by Thermal Evaporation of CdSe and CdTe
Tursun AblekimNational Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United StatesJoel N. DuenowNational Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United StatesXin ZhengNational Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United StatesHelio MoutinhoNational Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United StatesJohn MoseleyNational Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United StatesCraig L. PerkinsNational Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United StatesSteve JohnstonNational Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United StatesPatrick O’KeefeNational Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United StatesEric ColegroveNational Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United StatesDavid S. AlbinNational Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United StatesMatthew O. ReeseNational Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United StatesWyatt K. MetzgerNational Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, Colorado 80401, United States
2020en
ABI
Abstract
CdTe-based solar cells exhibiting 19% power conversion efficiency were produced using widely available thermal evaporation deposition of the absorber layers on SnO2-coated glass with or without a transparent MgZnO buffer layer. Evaporating CdSe and CdTe sequentially by thermal evaporation and subsequent CdCl2 annealing establishes efffective CdSeTe band grading as well as dense, large-grain films. These results show that high-performance II–VI photovoltaics can be made by inexpensive, commercially available evaporation systems without the need to build customized equipment, enabling CdTe photovoltaics research and manufacturing to be more accessible to the broader photovoltaics community.
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