First photo cell was constructed by using silver selenide
in place of copper oxide by a German Engineer, Charles Fritts in 1880.
Several reports have identified solid deposits that are composed primarily of Ag&S and silver selenide
(Ag&Se) (Aaseth et ai.
Silver sulphide, A[g.sub.2]S, and silver selenide
, A[g.sub.2]Se, have been used in photovoltaic cells, electrochemical storage cells, infrared detectors, photoconductors, and so on .
(15) These particles are composed predominantly either of silver sulfide or silver selenide
; over time, most of the silver sulfide is replaced with silver selenide