Pixelated Vacuum Flat Panel Detector Using ZnS Photoconductor and ZnO Nanowires Cold Cathode
Delin Hu1, Xingpeng Bai1, Chengyun Wang1
1State Key Laboratory of Optoelectronic Materials and Technologies, Guangdong Province Key Laboratory of Display Material and Technology, School of Electronics and Information Technology, Sun Yat-sen University, Guangzhou 510275, China.
Nanomaterials (Basel, Switzerland)
|March 10, 2022
Summary
Researchers developed a novel 4 × 7 pixel vacuum flat panel detector array using ZnS photoconductor and ZnO nanowires. This device, based on electron-bombardment-induced photoconductivity, demonstrates feasibility for effective pixelated imaging applications.
Area of Science:
- Photonics and advanced imaging technologies.
- Materials science for novel detector development.
- Vacuum electronic devices and applications.
Background:
- Vacuum flat panel detectors (VFPDs) with cold cathodes are crucial for large-area photoelectric detection.
- Photoconductor-type VFPDs exhibit high detection sensitivity via the electron-bombardment-induced photoconductivity (EBIPC) mechanism.
- Development of pixelated imaging devices based on VFPDs remains an unmet need.
Purpose of the Study:
- To fabricate and evaluate a pixelated vacuum flat panel detector array for imaging.
- To investigate the performance characteristics of a ZnS photoconductor and ZnO nanowires cold cathode-based VFPD.
- To demonstrate the imaging capability of the developed VFPD.
Main Methods:
- Fabrication of a 4 × 7 pixel VFPD array utilizing a ZnS photoconductor and ZnO nanowires cold cathode.
- Characterization of device responsivity and pixel current uniformity.
- Imaging experiments using patterned objects to assess performance.
Main Results:
- Successful fabrication of a functional 4 × 7 pixelated VFPD array.
- Demonstrated imaging of patterned objects, confirming the device's imaging capability.
- Analysis of responsivity and pixel uniformity provides insights into device performance.
Conclusions:
- The developed pixelated VFPD array is feasible for imaging applications.
- The combination of ZnS photoconductor and ZnO nanowires cold cathode shows promise for advanced imaging detectors.
- This work paves the way for future development of larger and more sophisticated VFPD imaging systems.
