Electroluminescent Quantum Dots and Photoluminescent Metal Halide Perovskites

Tuesday, September 25, 2018 11 a.m. to noon

NanoScience Technology Center 

Electroluminescent Quantum Dots and Photoluminescent Metal Halide Perovskites 

Yajie Dong, Ph.D. 
NanoScience Technology Center 
Materials Science & Engineering 
CREOL, The College of Optics & Photonics 
University of Central Florida 

Abstract: Through particle size and/or composition control, the emission wavelength of quantum dots (QDs) and metal halide perovskites (MHPs) can be precisely tuned to cover entire visible spectra, with outstanding color purity and high luminescence efficiencies. Both material systems can work in either photoluminescence (PL) or electroluminescence (EL) mode. In this talk, I will report our recent developments on both EL QD devices and PL MHP materials. For QDEL, I will focus on exploring emerging, high value-added photomedical light source markets. Recent developments of flexible QLEDs will be discussed, which promise to enable the widespread clinical acceptance of photomedical strategies for cancer treatments, wound repair or aesthetics. For PL MHP materials, I will discuss a versatile swelling-deswelling microencapsulation (SDM) strategy that has recently been developed to achieve highly stable metal halide perovskite nanoparticle-polymer composites (MHPNPCs). We envision that the outstanding green MHPNPCs could work synergistically with other state-of-the art red downconverters (i.e. quantum dots or narrow band phosphors) and enable low cost, efficient, color-vivid, and cadmium free back light unites (BLUs) for liquid crystal displays (LCDs). 

Biography: Dr. Yajie Dong is an assistant professor in NanoScience Technology Center of the University of Central Florida with Joint Appointment in Department of Materials Science & Engineering & College of Optics and Photonics. He received his BS and MS degrees from Tsinghua University of Beijing, China and his PhD degree from Harvard University. Before joining UCF in 2014, he worked as a Senior Scientist at QD Vision Inc and a postdoc associate at Massachusetts Institute of Technology. He is an associate editor of Optics Express and a member of Emissive Display (EMD) subcommittee of SID Technical Program Committee. He is broadly interested in materials challenges in nanoelectronics, optoelectronics and energy technologies. His current research focuses on luminescent quantum dot and metal halide perovskite materials and devices. 


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