Hybrid detector based on MOVPE grown InGaN/GaN MQW + BGO

0570907 - FZÚ 2024 RIV CZ eng A - Abstrakt
Hulicius, Eduard - Vaněk, Tomáš - Hospodková, Alice - Blažek, K.
Hybrid detector based on MOVPE grown InGaN/GaN MQW + BGO.
NANOCON 2022 - Book of Abstracts. Ostrava: Tanger Ltd, 2022 - (Zbořil, R.; Váňová, J.). s. 25-25. ISBN 978-80-88365-07-5.
[International Conference on Nanomaterials - Research & Application /14./ NANOCON. 19.10.2022-21.10.2022, Brno]
Grant CEP: GA MŠMT LM2018110; GA MŠMT(CZ) LTAIN19163; GA MŠMT(CZ) EF16_019/0000760
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: MOVPE * quantum wells * scintillator
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)

The work focus on description of MOVPE InGaN/GaN MQW scintillation structures. Scintillator works as a convertor of high-energy ionizing radiation to the radiation usually in the visible part of spectrum. These particles can be X-ray, gamma radiation or alpha, beta or proton particles. Preparation, properties and problems of MOVPE InGaN/GaN scintillators with MQW structures are discused. Efficient detection of high-energy ionizing radiation requires thick active region. The highest distance of two adjacent QWs ought to be lower than diffusion length of GaN exciton. This makes thick enough MQW structures infeasible because of structure polarization, strength, dislocations, other defects. We have realized alternative solution, which is a hybrid sandwich InGaN/GaN MQW + BGO (Bi4Ge3O12) detector. It is composed from 12 InGaN/GaN scintillators (4 scintillators joined in the stack) and enclosed by two BGO bulk scintillators 350 μm thick.
Trvalý link: https://hdl.handle.net/11104/0342237