UDC 621.382.002

Laser ablation and photostimulated passivation
of the surface of Cd_1–хZn_хTe crystals

Zagoruiko Yu. A., Kovalenko N. O., Khristyan V. A., Fedorenko O. A., Gerasimenko A. S., Dobrotvorskaya M. V., Mateychenko P. V.

Keywords: Cd_1–хZn_хTe detector, photostimulated surface passivation, laser ablation, leakage currents.

A new physical method of Cd_1–хZn_хTe-detectors passivation is proposed — the treatment of crystal surface by a laser ablation (LA) with subsequent photostimulated passivation (PhSP), during wich a high-resistance oxide layer is formed on it’s surface after the surface cleaning under intensive light irradiation effect. It is shown that the method of LA+PhSP is manufacturable and in comparison with PhSP and PhESP methods developed earlier provides a thick, homogeneous and high-oxide films, which significantly increases the surface resistivity of Cd_1–хZn_хTe samples and reduces leakage currents in them.

Ukraine, Kharkov, Institute of Monocrystals of NASU.