Development of AIIBVI semiconductors doped with Cr for IR laser application

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Abstract

Electrical and optical measurements obtained with CdSe single crystals doped with chromium from a gas source CrSe over a wide temperature range (500-1050 °C) are compared with ZnSe annealed in liquid metal (Zn). These processes are intended to control the concentrations of the impurity and intrinsic defects. The low temperature annealing of CdSe crystals in CrSe atmosphere allows obtaining high electron mobility up to 9000 cm2/Vs at 80 K and demonstrates the low native defect concentration. A high temperature annealing gives rise to increased electron concentration with decreased mobility, Optical absorption measurements show that at the high annealing temperature effective doping with Cr takes place. The impurity absorption beyond the absorption edge is interpreted by the excitation of Cr++ and Cr+ deep levels.

Original languageEnglish
Pages (from-to)555-559
Number of pages5
JournalMaterials Research Society Symposium Proceedings
Volume692
StatePublished - 1 Jan 2002
EventProgress in Semiconductor Materials for Optoelectronic Applications - Boston, MA, United States
Duration: 26 Nov 200129 Nov 2001

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