Wide Band Gap Halide Perovskite

Author

Miranda Bristol, University at Albany, State University of New YorkFollow

Date of Award

Spring 2025

Language

English

Embargo Period

4-25-2025

Document Type

Master's Thesis

College/School/Department

Department of Chemistry

Program

Chemistry

First Advisor

Michael Yeung

Second Advisor

Alan Chen

Keywords

Perovskite

Abstract

This thesis investigates the composition of alloyed materials required to stabilize cubic halide perovskites, aiming to offer a viable alternative to the commonly used oxides and lead-based perovskite wide band gap materials. This research aimed to identify materials that exhibit comparable or superior optoelectronic properties while minimizing geopolitical risks associated with critical materials. A wide band gap semiconductor, with a band gap larger than 2 eV, allows for more outstanding thermal and voltage stability and can absorb in the UV to the visible spectrum. The perovskite proposed in this study, CsSn_0.975Zn_0.025Cl₃, demonstrates promising potential for enhanced performance and versatile applications. The primary challenge researchers have with halide perovskites is their stability, particularly when exposed to air. This work focused on developing a stable alloyed compound that retains its integrity in ambient conditions. The samples were synthesized utilizing a straightforward, solid solution methodology, further enhancing the appeal of this composition. This investigation revealed that the alloy, CsSn_0.975 Zn_0.025Cl₃, can be synthesized with a wide band gap and remain stable when exposed to air. These findings are of great interest, as they present an attractive alternative to oxide-based materials currently dominating the industry. This halide perovskite composition also offers superior tunability and is less toxic than lead-based alternatives, highlighting its potential as a more sustainable option for future wide band gap materials.

License

This work is licensed under the University at Albany Standard Author Agreement.

Recommended Citation

Bristol, Miranda, "Wide Band Gap Halide Perovskite" (2025). Electronic Theses & Dissertations (2024 - present). 144.
https://scholarsarchive.library.albany.edu/etd/144