Faculty Advisor

Rao, Pratap M.

Abstract

BiI3 has favorable photovoltaic properties with an ideal band gap of 1.8 eV and potential processing through evaporation. There has been much research done on solution-processing BiI3 for photovoltaics. However, BiI3 thin films can be fabricated using evaporation techniques as well. Our group has developed a close-space sublimation (CSS) technique for fabricating BiI3 films with control over the crystal orientation. When fabricated by solution processing, the crystals orientation is random. However, when evaporating, moderating the source-substrate temperature difference results in the variance of crystal orientation. A large temperature difference produces vertical crystals, and a small difference produces horizontal crystals.

Publisher

Worcester Polytechnic Institute

Date Accepted

March 2019

Major

Chemical Engineering

Project Type

Major Qualifying Project

Accessibility

Unrestricted

Advisor Department

Mechanical Engineering

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