Journal
2018 IEEE 7TH WORLD CONFERENCE ON PHOTOVOLTAIC ENERGY CONVERSION (WCPEC) (A JOINT CONFERENCE OF 45TH IEEE PVSC, 28TH PVSEC & 34TH EU PVSEC)
Volume -, Issue -, Pages 3009-3012Publisher
IEEE
Keywords
Cadmium compounds; photovoltaic cells; aluminum compounds; II-VI semiconductors materials; solar energy
Categories
Funding
- NSF's Accelerating Innovation Research, DOE's SIPS
- NSF's Industry/University Cooperative Research Center programs
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Adding a thin layer of Al2O3 to the back of CdSeTe/CdTe devices has previously been shown to passivate the back interface and drastically improve surface recombination lifetimes. Using such a structure, lifetimes of over 400 ns have been recorded. Despite this, such devices do not currently show an improvement in open-circuit voltage (VOC) that is commensurate with this effect. Devices were fabricated using a range of Al2O3 thicknesses at the back interface. High efficiency devices exceeding 16.4% were fabricated with 0.5 nm Al2O3.
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