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[DOES Seminar] Prof. Oleksandr Voznyy (University of Toronto) Nov. 1st
Date 19-10-30 14:48
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Nov. 1st Fri. 2019, 3:00pm
N Center #86102, Sungkyunkwan University, Suwon

 

Heavy-Metal-Free Quantum Dot Inks for Thin-Film Tandem Solar Cells

Prof. Oleksandr Voznyy

(Department of Physical and Environmental Sciences, University of Toronto)

 

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Abstract

Tandem solar cells are a promising route to increase the efficiency of solar cells. They require semiconductor materials with a bandgap wider than that of silicon, and ideally not contain heavy metals. Due to the vacuum processing of conventional III-V materials, their price remains an order of magnitude higher than that of silicon. We propose to utilize colloidal quantum dot (CQD) inks to achieve scalable and low-cost solution processing of the state-of-the-art photovoltaic materials.

In this talk, I will summarize our recent progress in developing sintered CuInS2 QD films and potential ways to further improve their electronic properties. I will also discuss the application of machine learning for optimizing the synthesis of quantum dots, as well as computational predictions of new promising heavy-metal-free photovoltaic and optoelectronic materials.

 

Brief Bio

Alex earned his Ph.D. in physics of semiconductors from Chernivtsi National University, Ukraine for his work on electronic properties of nitride semiconductor alloys. Alex joined Ted Sargent’s Nanomaterials for Energy Group in 2011 and worked on characterization and modeling of the semiconductor nanocrystal surfaces and developing the synthesis methods for nanomaterials with improved optical and transport properties for photovoltaics. In 2018, Alex joined the Department of Physical and Environmental Sciences at the University of Toronto, Scarborough as an Assistant Professor in Clean Energy. His topics of interest are materials for energy storage and novel materials discovery using high-throughput experiments and machine learning.