Theses and Dissertations

ORCID

https://orcid.org/0000-0001-5044-4601

Advisor

Creutz, Sidney E.

Committee Member

Gangishetty, Mahesh

Committee Member

Mlsna, Todd

Date of Degree

8-13-2024

Original embargo terms

Visible MSU Only 1 year

Document Type

Graduate Thesis - Campus Access Only

Major

Chemistry

Degree Name

Master of Science (M.S.)

College

College of Arts and Sciences

Department

Department of Chemistry

Abstract

Chalcogenide perovskites with a distorted ABX3 structure (A: Ca, Ba, Sr; B: Zr, Hf; X: S, Se) are a prominent focus in optoelectronic materials. One of these is BaZrS3 which has garnered significant attention in perovskite materials due to its distinctive distorted perovskite structure and valuable optical properties that are viable for a single-junction solar cell and present a compelling option for tandem solar cell configurations. Another promising material is SrZrS3 which exists in two phases: needle-like non-perovskite α-SrZrS3 and distorted perovskite β-SrZrS3. The distorted perovskite phase shows promising luminescence properties in bulk, making it potentially viable for LED applications. In this work, we show that the non-perovskite α-SrZrS3 was accessed through colloidal synthesis at 330 °C and 365 °C by increasing concentrations of precursors. In order to favor the perovskite phase, we conducted alloying experiments incorporating varying percentages of doped Sr2+ into BaZrS3 to first synthesize a distorted perovskite Ba(1-x)SrxZrS3. Through varying percentages and varying reaction conditions such as temperature, time of reaction, and doping concentrations, we aim to optimize the synthesis of colloidal Ba(1-x)SrxZrS3 nanocrystals.

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