Ion-plasma protective coatings of CdTe surface for X- and gamma-ray detectors

• Published in: Surface & coatings technology Vol. 202; no. 11; pp. 2509 - 2512
• Main Authors: Kleto, G.I., Savchuk, A.I., Tkachuk, P.M., Tkachuk, V.I.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Lausanne Elsevier B.V 25-02-2008; Elsevier
• Subjects: Applied sciences; CdTe crystal; Corrosion; Corrosion prevention; Cross-disciplinary physics: materials science; rheology; Deposition; Exact sciences and technology; Leakage current; Materials science; Metals. Metallurgy; Physics; Pixeled detector; Protective coatings; Surface treatments; Pixeled detector; Leakage current; CdTe crystal; Protective coatings; Deposition; Plasma; Protective layer; Surface treatments; Corrosion protection
• ISSN: 0257-8972; 1879-3347
• DOI: 10.1016/j.surfcoat.2007.09.049

Comparative study of I–V characteristics of “metal-semiconductor-metal” structures without coatings and with protective coatings is presented. Regimes for radio frequency deposition of dielectric coatings on the surface of pixeled Schottky junction based on Cl-doped CdTe single crystals with high resistivity (10
7–10
10) Ω·cm were determined. In particular, the films with composition of (TeO
2)
x
–(SiO
2)
1
−
x
have demonstrated high isolation properties. Possible applications of new CdTe pixeled detectors with the studied protective coatings for high resolution spectrometry in X- and gamma-ray sensor devices are discussed.