The Influence of Structural Design on the Electronic Properties of a Frisch Grid Cadmium Zinc Telluride Detector by a Finite Element Method
Source abstract
Abstract
Cadmium zinc telluride (CZT) detectors have the advantages of high detection efficiency and good energy resolution, which are widely used in the fields of X-ray detection, environmental monitoring and nuclear radiation detection. The Frisch grid structure is used more often in the preparation of detectors because of its good unipolarity and simple structure. In this paper, the effects of changing the gate position, width and relative dielectric constant on the electrical properties of Frisch grid CZT detectors, such as potential, weight potential, electric field distribution and charge collection efficiency, are simulated in detail by the finite element method. From the simulation results, the optimisation of the performance of the Frisch grid detector is mainly based on minimising the distance between the gate and anode within a reasonable interval, increasing the area of the Frisch grid and selecting a material with a high relative permittivity for the fabrication of the Frisch grid. The research work contributes to the development of CZT detectors.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Semiconductor Detectors and Materials · Radiation Detection and Scintillator Technologies · Advanced X-ray and CT Imaging
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China
Nanjing Engineering Branch, Jiangsu Union Technical Institute, Nanjing 211135, China
State Key Laboratory of Materials for Advanced Nuclear Energy, Shanghai 200444, China
Zhejiang Institute of Advanced Materials, Shanghai University, Jiashan 314113, China
Shanghai Collaborative Innovation Center of Intelligent Sensing Chip Technology, Shanghai 201900, China
Funding
State Key Laboratory of Infrared Physics
References (29)
Show source-provided references
1. Progress in the development of CdTe and CdZnTe semiconductor radiation detectors for astrophysical and medical applications10.3390/s90503491 ↗
2. Semiconductor materials for X-ray detectors10.1557/mrs.2017.95 ↗
3. Kasap, S.O., and Willoughby, A. (2011). Mercury Cadmium Telluride: Growth, Properties and Applications, John Wiley & Sons.
4. CdTe and CdZnTe materials for room-temperature X-ray and gamma ray detectors10.1016/S0022-0248(97)00808-7 ↗
5. Myronakis, M.E., Zvelebil, M., and Darambara, D.G. (November, January 29). Pixelated CdZnTe for imaging in medicine: Overall performance assessment using an advanced computational modeling framework. Proceedings of the 2012 IEEE Nuclear Science Symposium and Medical Imaging Conference Record, Anaheim, CA, USA.10.1109/NSSMIC.2012.6551975 ↗
6. CZT detector technology for medical imaging10.1088/1748-0221/9/11/C11001 ↗
7. High-resolution virtual Frisch grid gamma-ray detectors based on as-grown CdZnTeSe with reduced defects10.1063/1.5109119 ↗
8. Bolotnikov, A.E., Camarda, G.S., Carini, G.A., Wright, G.W., McGregor, D.S., McNeil, W., and James, R.B. (2004). New results from performance studies of Frisch-grid CdZnTe detectors. Hard X-Ray and Gamma-Ray Detector Physics VI, SPIE.10.1117/12.563393 ↗
9. New trends in CdTe and CdZnTe detectors for X-and gamma-ray applications10.1016/S0168-9002(03)00745-9 ↗
10. Sze, S.M. (2008). Semiconductor Devices: Physics and Technology, John Wiley & Sons.
11. Method for mapping charge pulses in semiconductor radiation detectors10.1016/S0168-9002(98)01100-0 ↗
12. Makeev, A., McGrath, J., Clajus, M., Snyder, S., and Glick, S.J. (2013). Achieving sub-pixel resolution using CZT-based photon counting detectors for dedicated breast CT. Medical Imaging 2013: Physics of Medical Imaging, SPIE.10.1117/12.2008351 ↗
13. Review of the Shockley–Ramo theorem and its application in semiconductor gamma-ray detectors10.1016/S0168-9002(01)00223-6 ↗
14. Makeev, A., Rodrigues, M., Wang, G.-C., and Glick, S.J. (2015). Modeling CZT/CdTe X-ray photon-counting detectors. Medical Imaging 2015: Physics of Medical Imaging, SPIE.10.1117/12.2082039 ↗
15. Monte Carlo investigation of charge-transport effects on energy resolution and detection efficiency of pixelated CZT detectors for SPECT/PET applications10.1118/1.3532825 ↗
16. CdZnTe semiconductor parallel strip Frisch grid radiation detectors10.1109/23.682424 ↗
17. Unipolar charge sensing with coplanar electrodes-application to semiconductor detectors10.1109/23.467848 ↗
18. Nakhostin, M. (2017). Signal Processing for Radiation Detectors, John Wiley & Sons.10.1002/9781119410225 ↗
19. Ferbel, T. (1991). High-resolution electronic particle detectors. Experimental Techniques in High-Energy Nuclear and Particle Physics, World Scientific Publishing Co., Pte. Ltd.10.1142/1571 ↗
20. Signal, noise power spectrum, and detective quantum efficiency of indirect-detection flat-panel imagers for diagnostic radiology10.1118/1.598243 ↗
21. Low-noise techniques in Detectors10.1146/annurev.ns.38.120188.001245 ↗
22. Garrett, H.B., and Whittlesey, A.C. (2012). Guide to Mitigating Spacecraft Charging Effects, John Wiley & Sons.10.1002/9781118241400 ↗
23. On the Frisch–Grid signal in ionization chambers10.1016/j.nima.2011.12.047 ↗
24. Experiences with large-area frisch grid chambers in low-level alpha spectrometry10.1016/0167-5087(84)90664-1 ↗
25. Simulation of charge transport in pixelated CdTe10.1088/1748-0221/9/12/C12027 ↗
26. Variation of electric shielding on virtual Frisch-grid detectors10.1016/j.nima.2010.05.035 ↗
27. An array of virtual Frisch-grid CdZnTe detectors and a front-end application-specific integrated circuit for large-area position-sensitive gamma-ray cameras10.1063/1.4927455 ↗
28. Cui, Y., Bolotnikov, A., Camarda, G., Hossain, A., Yang, G., and James, R. (2009, January 1). CZT virtual Frisch-grid detector: Principles and applications. Proceedings of the 2009 IEEE Long Island Systems, Applications and Technology Conference, Farmingdale, NY, USA.10.1109/LISAT.2009.5031559 ↗
29. Noise and bandwidth of current recordings from submicrometer pores and nanopores10.1021/nn700322m ↗