Abstract
In this paper we present the status of HgCdTe barrier detectors with an emphasis on technological progress in metalorganic chemical vapor deposition (MOCVD) growth achieved recently at the Institute of Applied Physics, Military University of Technology. It is shown that MOCVD technology is an excellent tool for HgCdTe barrier architecture growth with a wide range of composition, donor/acceptor doping, and without post-grown annealing. The device concept of a specific barrier bandgap architecture integrated with Auger-suppression is as a good solution for high-operating temperature infrared detectors. Analyzed devices show a high performance comparable with the state-of-the-art of HgCdTe photodiodes. Dark current densities are close to the values given by “Rule 07” and detectivities of non-immersed detectors are close to the value marked for HgCdTe photodiodes. Experimental data of long-wavelength infrared detector structures were confirmed by numerical simulations obtained by a commercially available software APSYS platform. A detailed analysis applied to explain dark current plots was made, taking into account Shockley–Read–Hall, Auger, and tunneling currents.
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Acknowledgements
The work has been carried out under the financial support of the Polish National Science Centre as research Projects No. DEC-2013/08/M/ST7/00913 and DEC-2013/08/A/ST5/00773.
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Kopytko, M., Jóźwikowski, K., Martyniuk, P. et al. Status of HgCdTe Barrier Infrared Detectors Grown by MOCVD in Military University of Technology. J. Electron. Mater. 45, 4563–4573 (2016). https://doi.org/10.1007/s11664-016-4702-3
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DOI: https://doi.org/10.1007/s11664-016-4702-3