Dr. Yoon gave an invited seminar on August 31 at the Center for Integrated Nanotechnology in the Los Alamos National Laboratory (Title: Nanoscale EBIC Characterizations of Inhomogeneous Thin Film Solar Cells). Her group will be closely working with the CINT researchers on projects involving nanowires and quantum dots.
Author: HPY
2016 08 * Group members receive UROP Awards
Congratulations to Dean Collett, Eric Snyder, and Zijian Wang, who won UROP Awards!
Students from various disciplines around the University of Utah campus write research proposals to compete for the funded research program. UROP (Undergraduate Research Opportunities Program) provides assistantships up to $1,200 for each awardee. More information: http://our.utah.edu/for-students/urop/
2016 08 * REU Poster Presentation
Austin Koch, an REU (Rese
arch Experience for Undergraduates) participant, gave a poster presentation on August 5 at the Chemistry Atrium in Henry Eyring Building. His work focused on the nanoscale compositional analysis of topological insulators and 3D Dirac semimetals.
The samples were provided by Prof. Taylor Sparks (MSE) and Prof. Vikram Deshpande (Physics). The high-resolution STEM/EDX measurements were performed in the Utah Nanofab. Thank for the great help from the TEM experts (Dr. Jeffery Aguiar, Dr. Brian Devener) and Yoon’s Research Group members (Eric Snyder, Alvaro Bonilla, Dean Collett, Zijian, Wang).
Abstract: Topological insulators are a new class of materials in which the surface has a high conductivity similar to graphene, while the interior bulk has an insulating property. In order to realize the high performance optoelectronic devices, homogeneous materials are required. In this work, we investigated the surface and interior bulk properties of two materials (Cd3As2 Dirac semimetal and BiSbTeSe2 topological insulator) to determine local structural, compositional or fabrication-based anomalies.
2016 07 * One Fine Day at the U
We welcome a high-school intern, Sarah Shipp from the Waterford School. Sarah measures the variation of photocurrent of silicon solar cells that are mounted at 30° and 60° with respect to the ground. Read more
2016 06 * Welcome new group members!
Four talented students in the ECE department joined Yoon’s research group (Alvaro Bonilla, Dean Collette, Eric Synder, and Zijian Wang). We welcome an REU (Research Experience for Undergraduates supported by MRSEC), Austin Koch from University of Nebraska.
2016 Electronic Materials Conference
“Imaging Local Optoelectronic Properties of Polycrystalline CdTe Solar Cells”, H. Yoon , Y. Yoon, P. Haney, S. An, P. Koirala, R. Collins, J. Chae, A. Katzenmeyer, A. Centrone and N. Zhitenev, presented by H. Yoon at the Electronic Materials Conference in Newark, DE, June 2016.
1. Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah, USA.
2. Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland, USA.
3. Maryland NanoCenter, University of Maryland, College Park, Maryland, USA.
4. Physics and Astronomy, University of Toledo, Toledo, Ohio, USA; 5. Sandia National Laboratories, Albuquerque, New Mexico, USA
2016 06 * DRC/EMC
Dr. Yoon gave a talk at the 58th Electronic Materials Conference (Newark, Delaware), “Imaging Local Optoelectronic Properties of Polycrystalline CdTe Solar Cells”. She also served as a moderator in the Rump Session (Plasmonics and Meta-Materials: Where are the devices?) at the 74th Device Research Conference.
2016 04 * Technical Open House
The annual ECE Technical Open House held at the University Guest House. During the day, all graduating seniors made presentations of their senior thesis projects. Approximately half of the students participating in the conference had completed their projects as part of an Engineering Clinic team. In the Engineering Clinic Program, corporations sponsor projects that were carried out by teams of undergraduate seniors (Sponsored by L-3 Communications, Rocky Mountain Power, Sandia National Laboratories, and Moxtek).
Dr. Yoon served as a judge in Session 3. Students, thank you for your wonderful job today.
2016 Progress in Photovoltaics
“Through-the-glass spectroscopic ellipsometry for analysis of CdTe thin-film solar cells in the superstrate configuration”, P. Koirala1, J. Li, H. P. Yoon, P. Aryal, S. Marsillac, A. A. Rockett, N. J. Podraza and R. W. Collins, Progress in Photovoltaics 24, 1055, 2016.
2016 01 * Dr. Yoon teaches ECE 3200.
In Spring 2016, Heayoung teaches ECE 3200 (Introduction to Semiconductor Physics).
ECE 3200 – Introduction to Semiconductor Device Physics (3 credit)
Prerequisite(s): Major Status
Covers semiconductor material properties including crystal structure, classification of crystals, and electronic structure of atoms within the semiconductor. Provides derivations of principles of quantum mechanics and application to problems such as the quantum well. Covers energy bands and changes to energy levels within energy bands from doping, fundamentals of carrier generation, transportation, recombination, and the structure and operation principles of the basic solid-state p-n junction.
http://www.ece.utah.edu/courses