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.

• This report represents the work of one or more WPI undergraduate students submitted to the faculty as evidence of completion of a degree requirement. WPI routinely publishes these reports on its website without editorial or peer review.

Creator

• McRae, James Christopher

Publisher

• Worcester Polytechnic Institute

Identifier

• E-project-032019-014024

Advisor

• Rao, Pratap M.

Year

• 2019

Date created

• 2019-03-20

Location

• Worcester

Resource type

• Major Qualifying Project

Major

• Chemical Engineering

Rights statement

• In Copyright