About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Controlled Growth of Tellurium Network Structures for Multi-Spectral Photodetector Applications |
| Author(s) |
Ahmed Adel A. Abdelazeez, Yizhou Wang, Wanseok Oh, Michael G. Walter, Thomas A. Schmedake, Yong Zhang, Haitao Zhang |
| On-Site Speaker (Planned) |
Haitao Zhang |
| Abstract Scope |
Tellurium (Te), a metalloid and p-type semiconductor with a narrow band gap (1.2 – 0.3 eV), high responsivity, and excellent carrier mobility, is a promising material for short-wave infrared photodetection. In this study, we synthesized a novel Te-network structure using a cost-effective, low-temperature physical vapor deposition method suitable for large-area device fabrication. We explored the growth mechanism of Te nano- and microstructures by varying parameters such as pressure and growth time, revealing key relationships between growth conditions and the resulting morphology. The resulting structure demonstrated remarkable photodetection performance across blue (405 nm), green (532 nm), and near-infrared (808 nm) wavelengths with high responsivity and detectivity, making it a strong candidate for multispectral photodetectors. Notably, the device showed extreme sensitivity to weak light signals in the dark room. Investigation has been conducted in identifying the light sources and revealing the mechanism of this high sensitivity in photodetection. |