Graded composition and doping p-i-n AlxGa1−xAs/GaAs detector for unbiased voltage operation

• Published in: Nuclear science and techniques Vol. 33; no. 7; pp. 43 - 52
• Main Authors: Zhu, Zhi-Fu, Zou, Ji-Jun, Sun, Zhi-Jia, Huang, He, Xiu, Qing-Lei, Zhang, Zhong-Ming, Gan, Yong, Guo, Chen-Xian, Wang, Shao-Tang, Yue, Xiu-Ping, Kong, Guo-Li
• Format: Journal Article
• Language: English
• Published: Singapore Springer Nature Singapore 01.07.2022; State Key Laboratory of Particle Detection and Electronics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China%Engineering Research Center of Nuclear Technology Application(East China University of Technology),Ministry of Education,Nanchang 330013,China%State Key Laboratory of Particle Detection and Electronics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China%Engineering Department,LA14YW,Lancaster University,Lancaster,UK%School of Information Engineering,Zhengzhou University of Technology,Zhengzhou 450044,China; Engineering Research Center of Nuclear Technology Application(East China University of Technology),Ministry of Education,Nanchang 330013,China; School of Information Engineering,Zhengzhou University of Technology,Zhengzhou 450044,China
• Subjects: Beam Physics; Nuclear Energy; Particle Acceleration and Detection; Particle and Nuclear Physics; Physics; Physics and Astronomy; Graded composition; Ga; Detector; As/GaAs; p-i-n Al; Graded doping; p-i-n AlxGa1-xAs/GaAs
• ISSN: 1001-8042; 2210-3147
• DOI: 10.1007/s41365-022-01065-3

p-i-n Al x Ga 1− x As/GaAs detectors with graded compositions and graded doping were grown and prepared. From the current–voltage and capacitance–voltage measurement results, the devices had good p–n junction diode characteristics, and the electric field strength under an unbiased voltage was 1.7 × 10 5 Vcm −1 . The full width at half maximum and charge collection efficiency of the detectors obtained from energy spectrum measurements of 5.48-MeV alpha particles were 3.04 and approximately 93%, respectively. In this study, we created the most advanced and promising state-of-the-art unbiased detector reported to date.