Band Gap Tuning of Zinc Oxide Films for Solar Energy Conversion

By Kyoung-Shin Choi

Purdue University

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In this module students will learn about the synthesis and characterization of semiconducting films and the basics of their use for solar energy conversion. Students will learn a spray pyrolysis technique to prepare ZnO films and use a UV-Vis spectrophotometer to determine band gap size in order to characterize the films’ optical properties. Students will then design synthetic conditions to prepare ZnO-based solid solutions with varying concentrations of a chosen metal from a provided list of available metal nitrates. Students will conclude the module by determining the maximum amount of their chosen metal that can be incorporated in the ZnO lattice.