Long term stability of photosensitivity versus time in indium (III) sulfide thin films thermally vacuum evaporated onto photocell-patterned printed circuit boards varies sensitively with several factors including contact metal type, contact metal diffusion and electromigration into the semiconductor, doping, and encapsulation method. Because of the significant photoconductivity and relative low toxicity and environmental impact of this compound semiconductor, it is important to better characterize these dependences toward commercial applications. We will report on measurements of photoconductivity vs. time as functions of such factors and evolving methods to stabilize this photoconductivity.
Rehder, Gustavo; Engelken, Robert; Stidham, Randy; Tanner, Richard; Ketchum, Lee; and Baral, Anil
"Stability and Optimization of Photoconductivity in Thermally Vacuum Evaporated Indium (III) Sulfide Thin Films,"
Journal of the Arkansas Academy of Science: Vol. 56
, Article 21.
Available at: http://scholarworks.uark.edu/jaas/vol56/iss1/21