Laser ablation and photostimulated passivation
Zagoruiko Yu. A., Kovalenko N. O., Khristyan V. A., Fedorenko O. A., Gerasimenko A. S., Dobrotvorskaya M. V., Mateychenko P. V.
Keywords: Cd1–õZnõTe detector, photostimulated surface passivation, laser ablation, leakage currents.
A new physical method of Cd1–õZnõTe-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 Cd1–õZnõTe samples and reduces leakage currents in them.
Ukraine, Kharkov, Institute of Monocrystals of NASU.