|
Education and Background Research Highlight Publications People Contact
Education
University of California, Los Angeles Materials Science and Engineering Ph.D. 2010
Tsinghua University, China Polymer Science and Engineering, M.S. 2003
Tsinghua University, China Chemical Engineering B.S. 2001
Academic experience
2014/08 – Present Assistant Professor, Industrial & Manufacturing Engineering, Florida State University
2011/05 – 2014/07 Postdoctoral Scholar, Electrical Engineering & Computer Sciences, University of California, Berkeley
2010/03– 2011/05 Postdoctoral Scholar, Materials Science and Engineering, University of California, Los Angeles
Non- academic experience
2007/10 – 2008/01, Research scientist (Intern), Pavad Medical Inc., Fremont, CA
2003/12 – 2005/08, Process engineer, ST Microelectronics, Singapore
Honors and awards
Air Force YIP Award (2016)
FSU first-year assistant professor (FYAP) award (2015)
UCLA Chancellor’s Scholarship (2006-2008)
Topic 1: Organometal halide perovskite materials and devices
Organometal halide perovskite (Pero) materials have exceptional electronic and optical properties, for a new generation of large area, high performance optoelectronic devices. While all reported Pero devices contained a multi-layer device architecture, we reported for the first time single-layer Pero LEDs using a composite thin film of Pero and poly(ethylene oxide) (PEO).
Mixing PEO with Pero improves the film continuity and smoothness as shown in the SEM images of Pero only, and Pero/PEO composite thin films with PEO/Pero ratio of 0.25:1, 0.5:1, and 0.75:1. A fully continuous thin film can be obtained which is critical for the success of electronic device fabrication.
Single-layer light-emitting diodes (LEDs) using the composite thin film sandwiched between indium tin oxide and indium-gallium eutectic alloy exhibit a low turn-on voltage and high brightness
Topic 2: Stretchable, active-matrix organic light-emitting diode (OLED) displays
Large external displays can now connect to laptop and notepad computers for daily office work. However, carrying a large display for travel is not practical giving the large size and heavy weight of current external displays. An ideal solution is to develop new displays that are light weight and stretchable. They can be folded like handkerchiefs into small sizes for easy portability and unfolded into large screens to plug into all other small size portable electronics including cell phones and smart watches, etc.
In collaboration with Dr. Chuan Wang at Michigan State University, we are investigating the fundamental material structure-property relationships essential for stretchable thin-film transistors and the integration of stretchable OLEDs and stretchable thin-film transistors. This project is currently funded by National Science Foundation of USA.
- S. G. R. Bade, J. Li, X. Shan, Y. Ling, Y. Tian, T. Dilbeck, T. Besara, T. Geske, H. Gao, B. Ma, K. Hanson, T. Siegrist, C. Xu, Z. Yu*, Fully Printed Halide Perovskite Light-Emitting Diodes with Silver Nanowire Electrodes, ACS Nano, Vol. 10, 1795-1801, 2016.
- J. Li, S. G. R. Bade, X. Shan, Z. Yu*, Single-Layer Light-Emitting Diodes Using Organometal Halide Perovskite/Poly(ethylene oxide) Composite Thin Films, Adv. Mater., 2015, accepted (* corresponding author)
- L. Cai, S. Zhang, J. Miao, Z. Yu, C. Wang, Fully-Printed Foldable Integrated Logic Circuits with Tunable Performance Using Semiconducting Carbon Nanotubes, Adv. Funct. Mater., 2015, accepted
- Z. Yu, Q. Zhang, L. Li, Q. Chen, X. Niu, J. Liu, Q. Pei, Highly Flexible Silver Nanowire Electrodes for Shape-Memory Polymer Light-emitting Diodes, Advanced Materials, Vol. 23, 664-668, 2011.
- Z. Yu, L. Li, Q. Zhang, W. Hu, Q. Pei, Silver Nanowire-Polymer Composite Electrodes for Efficient Polymer Solar Cells, Advanced Materials, Vol. 23, 4453-4457, 2011.
- Z. Yu, X. Niu, Z. Liu, Q. Pei, Intrinsically Stretchable Polymer Light Emitting Devices Using Carbon Nanotube-Polymer Composite Electrodes, Advanced Materials, Vol. 23, 3989-3994, 2011.
- Z. Yu, M. Wang, G. Lei, J. Liu, L. Li, Q. Pei, Stabilizing the Dynamic p-i-n Junction in Polymer Light Emitting Electrochemical Cells, Journal of the Physical Chemistry Letters, Vol. 2, 367-372, 2011.
- Z. Yu, W. Yuan, P. Brochu, B. Chen, Z. Liu, Q. Pei, Large-strain, rigid-to-rigid deformation of bistable electroactive polymers, Applied Physics Letters, 95, 192904, 2009.
- K. Takei*, Z. Yu*, M. Zheng, T. Takahashi, A. Javey, “Highly-sensitive electronic-whiskers based on patterned carbon nanotube and silver nanoparticle composite films”, Proceedings of the National Academy of Sciences (PNAS), 111 (5), 1703-1707, 2014 (* equal contribution)
- R. Kapadia*, Z. Yu*, H. Wang, M. Zheng, C. Battaglia, M. Hettick, D. Kiriya, K. Takei, P. Lobaccaro, J. W. Beeman, J. W. Ager, R. Maboudian, D. C. Chrzan, A. Javey, "A direct thin-film path towards low-cost large-area III-V photovoltaics", Scientific Reports, Vol. 3, 2275, 2013 (* equal contribution)
- R. Kapadia, Z. Yu, M. Hettick, J. Xu, M. S. Zheng, C.-Y. Chen, A. D. Balan, D. C. Chrzan, A. Javey, “Deterministic nucleation of InP on metal foils with the thin-film vapor-liquid-solid growth mode”, Chemistry of Materials, Vol. 26 (3), 1340–1344, 2014.
- C. Wang, D. Hwang, Z. Yu, K. Takei, J. Park, T. Chen, B. Ma, A. Javey, User-interactive electronic-skin for instantaneous pressure visualization, Nature Materials, Vol. 12, 899–904, 2013.
- J. Liang, L. Li, X. Niu, Z. Yu, Q. Pei, Elastomeric Polymer Light-Emitting Devices - Towards Fully Stretchable Organic Displays, Nature Photonics, Vol. 7, 817-824, 2013.
Postdoc
Dr. Junqiang Li (Ph.D. in Condensed Matter Physics from Institute of Physics, Chinese Academy of Sciences)
Ph.D. student
Mr. Tommy Geske (FSU Materials Program)
Ms. Xin Shan (FSU Industrial Engineering)
Master student
Mr. Ganesh Bade (FSU Industrial Engineering)
Undergraduate student
Mr. Nicolas Salazar (FSU Mechanical Engineering)
Alumni
Mr. Thomas Porkka (summer intern undergraduate student through NSF funded RETREAT REU program, 2015)
Mr. Mateus Horvath (summer intern undergraduate student through Brazilian Scientific Mobility Program, 2015)
Mr. Omena Okpowe (FSU Materials Program rotation Ph.D. student, 2014)
Mr. Ifedayo Ogundana (co-advised Master student at Florida Agricultural & Mechanical University, 2014-2015)
|
