Photoelectrochemical solar cell fabrication with tungsten diselenide single crystals

Abstract

Recent reports on highly efficient photoelectrochemical solar cells with n-type WSe2 have prompted us to grow n-type single crystals of WSe2 using a chemical vapour transport method. Different transporting agents have been used. It is seen that SeCl4 transporter leads to very large single crystals of p-type WSe2, whereas the same transporting agent with excess amount of Se leads to n-type single crystals. PEC solar cells fabricated with p-type and n-type crystals thus grown have been reported and the results discussed. © 1989 the Indian Academy of Sciences.