About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
Presentation Title |
Controlled Growth of Tellurium Micro- and Nanostructures for Photodetection Applications |
Author(s) |
Ahmed Adel A. Abdelazeez, Tom Schmedake, Yong Zhang, Haitao Zhang |
On-Site Speaker (Planned) |
Ahmed Adel A. Abdelazeez |
Abstract Scope |
Tellurium (Te) is one of the metalloid elemental materials with properties in between those of metals and nonmetals. As a p-type semiconductor, Te has narrow band gap (1.2 to 0.3 eV), large responsivity, high detectivity, high on/off ratios, and high carrier mobility, making it a promising material for short-wave infrared photodetection. This study is focused on the controlled growth of Te micro- and nanostructures using physical vapor deposition method. Growth mechanism study reveals effects of growth parameters on the dimensional and morphological control. Structure characterization using angle-resolved Raman spectroscopy and other techniques demonstrates the anisotropic structure and optical properties of different Te structures. Specifically, electrical measurements of the Te structures under different light illumination conditions are performed to clarify issues in photoconductivity behaviors and demonstrate the photodetection performance. |