FIXING STOICHIOMETRY OF CUI FOR CONTROLLED MEASUREMENTS OF SEMICONDUCTING PROPERTIES**
Copper (I) Iodide is a p-type semiconductor of band gap of ~ 3.1 eV. The high hole mobility, good optical transparency and ease of fabricating thin films makes it a rare example of a solution processable transparent hole conductor. The properties of CuI depend on presence of iodine in stoichiometric excess, when iodine acts as an electron acceptor generating holes in the valence band. All samples of CuI including freshly prepared contain excess iodine due oxidation. A method is described for elimination excess iodine CuI so that doping could be controlled to conduct accurate measurements of carrier concentration, mobilities and optical properties.
Financial support from following programs are acknowledged: UWG FRG, UWG SEEP Undergraduate Research and Mentoring Program and UWG SRAP.
Morris*, Nicole; Harwell*, Joshua; DeSilva, L. Ajith; Tennakone, K.; and Perera, A. U.
"FIXING STOICHIOMETRY OF CUI FOR CONTROLLED MEASUREMENTS OF SEMICONDUCTING PROPERTIES**,"
Georgia Journal of Science, Vol. 76, No. 1, Article 16.
Available at: https://digitalcommons.gaacademy.org/gjs/vol76/iss1/16