TUNABLE EARTH ABUNDANT, NON-TOXIC PHOTOVOLTAIC DEVICES FOR LOW LIGHT AND VARIABLE LIGHT LEVEL POWER APPLICATIONS

摘要

A method of fabricating a photovoltaic device includes performing fabrication operations to form the photovoltaic device. The fabrication operations include replacing a portion of selenium with sulfur in a copper zinc tin sulfur selenium alloy (CZTSSe) material arranged on a substrate to form a sulfur enriched CZTSSe material to alter a band gap of the CZTSSe material. The fabrication operations include removing surface secondary phases or degraded portions of the sulfur enriched CZTSSe material to form a single phase sulfur enriched CZTSSe material. The fabrication operations further include replacing the substrate in contact with the single phase sulfur enriched CZTSSe material with a different contact material to form an exfoliated sulfur enriched CZTSSe device.