NDLI: Electrical contacts on MOVPE-Grown ZnSe based laser diodes

Content Provider	IEEE Xplore Digital Library
Author	Abdel Naby, M.
Copyright Year	1998
Description	Author affiliation: Fac. of Eng., Tanta Univ., Egypt (Abdel Naby, M.)
Abstract	The electrical characterization of metal contacts to Cl and N-doped ZnSe material systems is reported. Metalorganic vapor phase epitaxy (MOVPE) was used to grow the doped ZnSe samples at 330/spl deg/C. With intentional chlorine doping using 1-chlorobutane, free electron concentrations of up to 8/spl times/10/sup 17/ cm/sup -3/ have been achieved. Photoluminescence (PL) spectra in conjunction with scanning transmission electron microscopy (SEM) were used to verify the layer properties. The turn-on voltage (V/sub T/) of Ti/Pd/Au contact on the Cl-doped ZnSe epitaxial layer was significantly reduced by etching the ZnSe surface in NaOH, which was found to be due to removal of the native oxide layer grown on the ZnSe surface. Current-voltage (I-V), capacitance-voltage (C-V) measurements were used to investigate the junction properties of the Au/ZnSe:N structure before and after heat treatment at 400/spl deg/C for 15 min. in N/sub 2/ atmosphere. The results indicated that the annealing procedure leads to redistribution of impurities and improves the electrical properties of the samples. C-V measurements on ZnSe:N show semi-insulating behaviour before annealing. However, after heat treatment the layer shows p-type conduction with an acceptor concentration of the order of 2/spl times/10/sup 16/ cm/sup -3/.
Starting Page	53
Ending Page	58
File Size	437340
Page Count	6
File Format	PDF
ISBN	0780349695
DOI	10.1109/ICM.1998.825566
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-12-16
Publisher Place	Tunisia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Contacts Zinc compounds Diode lasers Capacitance-voltage characteristics Epitaxial growth Epitaxial layers Scanning electron microscopy Gold Surface treatment Atmospheric measurements
Content Type	Text
Resource Type	Article

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