Date of Graduation
12-2016
Document Type
Thesis
Degree Name
Master of Science in Microelectronics-Photonics (MS)
Degree Level
Graduate
Department
Microelectronics-Photonics
Advisor/Mentor
Omar Manasreh
Committee Member
William F. Oliver III
Second Committee Member
Jingxian Wu
Third Committee Member
Rick Wise
Keywords
Applied sciences
Abstract
Lead selenide and lead selenide/lead sulfide core/shell nanocrystals were investigated for use in near infrared photodetectors. A colloidal synthesis method was used for both the core and core/shell configurations. The lead sulfide shell was examined in order to mitigate oxidation of the nanoparticle surface. Absorbance and photoluminescence spectra were measured at room temperature and 77 K, respectively. Transmission electron microscopy images were also obtained to confirm crystallography and size. Bulk lead selenide was simulated in WIEN2k utilizing the linear-augmented plane wave method of solving density functional theory to better understand the electronic structure of PbSe. The crystal structure, electron density, band structure and density of states are presented and discussed. The calculations correctly predicted a direct band gap at the L point in the Brillouin zone. The band gap calculated was 0.40 eV.
Citation
Morris, H. A. (2016). Investigation of the Optical Properties of PbSe/PbX Nanocrystals for Photodetector Applications. Graduate Theses and Dissertations Retrieved from https://scholarworks.uark.edu/etd/1828
Included in
Electromagnetics and Photonics Commons, Electronic Devices and Semiconductor Manufacturing Commons, Semiconductor and Optical Materials Commons