Simulated and measured performance of HgCdTe focal plane arrays

Galina V. Chekanova; Albina A. Drugova; Viacheslav Kholodnov; Mikhail S. Nikitin

doi:10.1117/12.800452

2 October 2008 Simulated and measured performance of HgCdTe focal plane arrays

Galina V. Chekanova, Albina A. Drugova, Viacheslav Kholodnov, Mikhail S. Nikitin

Proceedings Volume 7113, Electro-Optical and Infrared Systems: Technology and Applications V; 71131H (2008) https://doi.org/10.1117/12.800452
Event: SPIE Security + Defence, 2008, Cardiff, Wales, United Kingdom

Abstract

Ways to improve performance of scanning and starring types photovoltaic (PV) infrared (IR) Hg_1-xCd_xTe focal plane arrays (FPA) including Hg_1-xCd_xTe Long-Wave (LWIR) PV FPA covering spectral range from 8 to 12 μm requires comprehensive estimation of photodiode's (PD) performance depending on Hg_1-xCd_xTe material properties and operating conditions and comparing it to real data published for commercial products. Advanced Infrared Focal Plane Arrays including extended Long-Wave (LWIR) 8-14 μm operating at temperatures T_op=80-100 K can be developed with due accounting of correlation between measured and correctly calculated performance. Optimized PD with n⁺-p junction is characterized by lower dark current value than previously reported in same kind n⁺-p junction. Lowest dark current is preferable for proper multiplexing of PD arrays to Silicon Read-out Integrated Circuits (ROICs) and hence to get highest possible performance as well. Comparative analysis of LWIR PD performance at 80 K is needed also to understand ways to improve FPA useful quality. Objective of the present work was to calculate Hg_1-xCd_xTe LWIR PV FPA (λ_co equals to 9.5-10.3 μm at T_op=80 K) performance variation with doping level, absorber thickness, surface recombination rate and compare it to measured data on arrays with time-and-delay integration (TDI) mode of operation. Commercial LWIR PV FPAs are fabricated as usual on Hg_1-xCd_xTe layers grown by Liquid Phase Epitaxy (LPE).

Citation Download Citation

Galina V. Chekanova, Albina A. Drugova, Viacheslav Kholodnov, and Mikhail S. Nikitin "Simulated and measured performance of HgCdTe focal plane arrays", Proc. SPIE 7113, Electro-Optical and Infrared Systems: Technology and Applications V, 71131H (2 October 2008); https://doi.org/10.1117/12.800452

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