Assessment of InSb photodetectors on Si substrates

Date

2003-03-07

Author

Ozer, S
Beşikci, Cengiz

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

185
views

0
downloads

We present the detailed characteristics of small area (33 x 33 mum(2)) InSb photodiodes grown on GaAs coated Si substrates by molecular beam epitaxy. In spite of very large lattice mismatch, 80 K peak detectivity of similar to1 x 10(10) cm Hz(1/2) W-1 has been measured under backside illumination without anti-reflection coating. Differential resistance at 80 K is limited by Ohmic leakage under small reverse bias and trap assisted tunnelling (TAT) under moderately large reverse bias. In the temperature range of 80-140 K, the zero-bias resistance is considerably degraded by Ohmic leakage which has a small activation energy of 25 meV While the excess leakage seems to be related with the dislocations, the peak quantum efficiency is not considerably affected by the presence of dislocations. 80 K 1/f noise is dominated by TAT processes, and the noise current at 1 Hz follows the empirical relation i(n) = alpha(TAT)(I-TAT) with alpha(TAT) = 7.5 x 10(-7) and beta = 0.55. Bias dependence of the generation-recombination noise is discussed and compared with the predictions of Kleinpenning's mobility fluctuation model.

Subject Keywords

Acoustics and Ultrasonics, Electronic, Optical and Magnetic Materials, Surfaces, Coatings and Films, Condensed Matter Physics

URI

https://hdl.handle.net/11511/37928

Journal

JOURNAL OF PHYSICS D-APPLIED PHYSICS

DOI

https://doi.org/10.1088/0022-3727/36/5/321

Collections

Department of Electrical and Electronics Engineering, Article

Suggestions

OpenMETU
Core

Photo-stimulated luminescence of calcium co-doped BaFBr : Eu2+ x-ray storage phosphors SCHLAPP, M; Bulur, Enver; VON SEGGERN, H (IOP Publishing, 2003-01-21) The influence of calcium co-doping on the optical properties of the x-ray storage phosphor BaFBr: Eu2+, is determined by photo- stimulated luminescence techniques. It is found that the incorporation of calcium into the lattice results in a broadening of the photo- stimulation peak due to a calcium induced FA(Br, Ca2+)-centre with stimulation maxima at 540 and 680 nm. The optical cross-sections for the photo- stimulated process are determined by utilizing stimulation light with linearly increasing intensity....
Perturbation analysis of sheath evolution, with application to plasma source ion implantation Bektursunova, RM; Demokan, O (IOP Publishing, 2001-02-07) A perturbation model has been developed to describe the evolution of an expanding plasma sheath around a cathode after a high-voltage negative pulse is applied to the cathode, simulating the conditions in devices such as those used for plasma source ion implantation. The set of governing equations consists of two coupled collisionless fluid equations for ions, and Poisson's equation and Boltzmann's assumption for electrons. The time-dependent, self-consistent expressions for the potential, ion density and i...
Hydrodynamic approach for modelling transport in quantum well device structures Beşikci, Cengiz; Sen, O (IOP Publishing, 1998-09-07) A semiclassical approach for modelling electron transport in quantum well structures is presented. The model is based on the balance equations governing the conservation of particle density, momentum and energy with Monte Carlo (MC) generated transport parameters. Three valleys of the conduction band, size quantization in the Gamma valley, and the lowest two subbands in the quantum well are considered by taking the detailed intersubband dynamics into account. The transport parameters of the model are extrac...
Design of a microbial sensor using conducting polymer of 4-(2,5-di(thiophen-2-yl)-1H-pyrrole-1-l) benzenamine Tuncagil, Sevinc; ODACI DEMİRKOL, DİLEK; Yidiz, Ersin; TİMUR, SUNA; Toppare, Levent Kamil (Elsevier BV, 2009-03-28) A microbial biosensor based on Gluconobacter oxydans cells immobilized on the conducting polymer of 4-(2,5-di(thiophen-2-yl)-1H-pyrrol-1-yl)benzenamine (SNS-NH2) coated onto the Surface of graphite electrode was constructed. The proposed biosensor was characterized using glucose as the Substrate. The linear relation was observed in the range of 0.1-2.5 mM and defined by the equation y = 0.415x + 0.377 (R-2 = 0.986). Analytical characterization, effects of electropolymerization time, pH, cell amount and the ...
A multi-spectroscopic study of luminescence sensitivity changes in natural quartz induced by high-temperature annealing SCHILLES, T; POOLTON, NRJ; Bulur, Enver; Botter-Jensen, L; MURRAY, AS; Smith, G; RIEDI, PC; WAGNER, GA (IOP Publishing, 2001-03-07) The luminescence sensitivity of natural quartz is significantly enhanced if heated beyond the first and second crystal phase transitions, in the temperature range 500-1100 degreesC. This work employs a number of complementary spectroscopic methods to obtain a fuller understanding of the mechanisms of this sensitization process. Spectrally resolved radioluminescence is used to study the role played by hole trapping recombination sites. Linearly-modulated optically stimulated luminescence is used to probe a n...

Citation Formats

S. Ozer and C. Beşikci, “Assessment of InSb photodetectors on Si substrates,” JOURNAL OF PHYSICS D-APPLIED PHYSICS, pp. 559–563, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/37928.