Three-dimensional analytical simulation of self- and cross-responsivities of photovoltaic detector arrays
Abstract
A three-dimensional analysis of the degradation of spatial resolution and sensitivity due to lateral transport, an effect which occurs with decreasing dimension and an increasing number of imaging photodiode array elements, is presented. The effect is manifested in excess carrier distribution, photocurrent, self-responsivities, and cross-responsivities. Results for three detector structures explain the reduced quantum efficiency of small-area detectors. The present method allows prediction of the limited effect of diffusion length on self-responsivity and cutoff wavelength. The presently determined spectral responses are found to be consistent with data obtained on InSb and HgCdTe test arrays.
- Publication:
-
IEEE Transactions on Electron Devices
- Pub Date:
- October 1987
- DOI:
- 10.1109/T-ED.1987.23199
- Bibcode:
- 1987ITED...34.2059L
- Keywords:
-
- Arrays;
- Photodiodes;
- Simulation;
- Three Dimensional Models;
- Absorptivity;
- Indium Phosphides;
- Mercury Cadmium Tellurides;
- Quantum Efficiency;
- Instrumentation and Photography