Colloquium: Dr. Yusuf Kelestemur, METU

ABSTRACT:

Colloidal semiconductor nanocrystals (NCs) have become a highly promising materials for various applications ranging from optoelectronics to biology. In this talk, I will present the recent class of semiconductor NCs: colloidal quantum wells. These atomically-flat nanocrystals enable to access unique optoelectronic characteristics with their quasi-two-dimensional structure, resembling epitaxially-grown quantum wells. They exhibit narrower emission linewidth, larger absorption cross-section, giant oscillator strength, and suppressed Auger recombination as compared to spherically shaped NCs. In the first part of my talk, I will discuss the advanced heterostructures of colloidal quantum wells obtained by designing their three-dimensional structure, tuning their composition and engineering their band alignment. In the second part of my talk, I will focus on the specially designed core/shell heterostructures of colloidal quantum wells for the fabrication of highly efficient light-emitting devices.

Join Here: 
https://umbc.webex.com/umbc/j.php?MTID=m3000a2cfcc900d12cec0d02b930edf96


Meeting number: 2621 955 5740
Password: uPJX6JMQg69

Join by video system
Dial 26219555740@umbc.webex.com
You can also dial 173.243.2.68 and enter your meeting number.

Join by phone
+1-202-860-2110 United States Toll (Washington D.C.)

Access code: 262 195 55740