Synthesis and characterization of CuZn2InSe4 and CuZn2GaSe4 nanocrystals

Synthesis and characterization of CuZn2InSe4 and CuZn2GaSe4 nanocrystals

Presenter(s)

Fajer A. Almanea (Presenting author); other authors: Sohini Sengupta, Venkateswar Rao, Soubantika Palchoudhury (faculty advisor)

Comments

Presentation: 10:40-11:00 a.m., Science Center 146

Description

A particular class of materials, multinary chalcogenide semiconductor nanocrystals, allow for tunable band gap and optical properties through composition, structure, and morphology flexibility. Among them, the copper-based compounds are attractive- in terms of sustainability since they frequently contain elements that are found in abundance on the earth’s crust and are promising to have made significant advancements for various device applications including photovoltaics and. CuZn2InSe4 and CuZn2GaSe4 nanocrystals have been synthesized using a novel hot injection approach to engineer these materials at the nanoscale. We added various cations, zinc, copper, group III elements like gallium or indium, oleylamine as the ligand, and diphenyl diselenide as our selenium source to form the multinary composition. A modified hot injection method was used where we injected the chalcogen at 150 °C and then heated the reaction to get the final product. The stoichiometry and group III cations were tuned in this multinary chalcogenide nanocrystal composition to achieve the desired bandgap of the materials in the visible range for application in thin film solar cells.

Publication Date

4-19-2023

Project Designation

Graduate Research

Primary Advisor

Soubantika Palchoudhury

Primary Advisor's Department

Chemical and Materials Engineering

Keywords

Stander Symposium, School of Engineering

Synthesis and characterization of CuZn2InSe4 and CuZn2GaSe4 nanocrystals

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