The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON ELECTRONICS
Transactions ID Number: 42-545
Full Name: Genc Hyseni
Position: Researcher
Age: ON
Sex: Male
Address: 10000 Prishtinë, Fakulteti Teknik, Kodra e Diellit, pn, Republic of Kosova
Country: YUGOSLAVIA
Tel: +377 44 511 697
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E-mail address: genchyseni@gmail.com
Other E-mails: genc.hyseni@asseco-see-ks.com, genchyseni@hotmail.com
Title of the Paper: Infrared Thermal Detectors Parameters: Semiconductor Bolometers Versus Pyroelectrics
Authors as they appear in the Paper: Genc Hyseni, Nebi Caka, Kujtim Hyseni
Email addresses of all the authors: genchyseni@gmail.com, nebi.caka@fiek.uni-pr.edu, kujtim.hyseni@fiek.uni-pr.edu
Number of paper pages: 10
Abstract: Semiconductor bolometric detectors parameters have been analyzed within the wavelength of 100ƒÊm up to 3mm and cryogenic temperatures. From analyses and results obtained, it is shown that the values of NEP have been found to be 16.4~10-15W/Hz-1/2 and 38.466~10-15W/Hz-1/2 for cryogenic temperatures 0.5K and 5K, respectively. For the wavelength 200 ƒÊm, the maximum value of the voltage responsivity RV of the bolometer is 0.106~10-11 V/W, while for the wavelengths 1 mm, 2 mm and 3 mm, corresponding values of voltage responsivity RV of the bolometer are 0.53~10-11 V/W, 0.58~10-11 V/W and 0.637~10-11 V/W, respectively. This paper also outlines analyzes of the temperature dependency of infrared pyroelectric detectors parameters at medium wavelength (MWIR). Certain pyroelectric materials such as TGS, LiTaO3, LiNbO3, Li2SO4xH2O, BaTiO3, NaNO2, PVF2, SBN and SbSi have been analyzed within the temperature range of 273K up to 343K. Analytically it is proven that thermal!
time constant decreases with increasing temperature and decreasing the thickness of the detector. Analyses have shown that the smallest response time for detector which operates at room temperature 300K was achieved for the material Li2SO4~H2O with value of several milliseconds, but anyway much greater then that of photon detectors. It is also shown that NEP depends directly on circuit noises voltages. In the paper are analyzed three types of noises: thermal noise, dielectric noise, and amplifier noise. The maximum possible value of detectivity to be achieved for a MWIR infrared pyroelectric detector operates at room temperature 300K was 2.12~108 for NaNO2.
Keywords: infrared, bolometers, pyroelectricity, pyroelectric detectors, responsivity, thermal time constant, NEP, detectivity
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