Title

Laser Fabrication Of Silicon Carbide Light Emitting Diodes

Abstract

With the shrinkage in the size of the semiconductor devices, greater shift has been observed towards use of lasers, electron and x-ray beams and advanced optics for small area device fabrication. A novel laser direct-write doping and metallization technique provides a single step approach for processing wide bandgap materials for electronic and optoelectronic device applications, which are difficult to dope using conventional techniques. Laser doping opens the opportunity to use unconventional dopants for customizing emission wavelength. It effectively reduces the number of fabrication steps and allows for selective area doping and direct metallization without metal deposition. To demonstrate this technology a pulsed Nd:YAG laser (1064nm wavelength) was used to fabricate blue light emitting laser diodes in a silicon carbide (SiC) 6H:SiC (n-type) wafer substrates. A p-n junction was created by laser doping aluminum (ptype) and nitrogen (n-type) on clean SiC wafer. Pure indium wire was used to obtain good ohmic contacts. These devices were characterized by capacitancevoltage (C-V), current-voltage (I-V), and electroluminescence (EL) measurements. A narrow electroluminescence (EL) peak at 481.82 nm and broad EL peak around 498.8 nm wavelengths were observed with two different detectors, characterizing the p-n junction as a blue light emitter.

Publication Date

1-1-2006

Publication Title

ICALEO 2006 - 25th International Congress on Applications of Laser and Electro-Optics, Congress Proceedings

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.2351/1.5060902

Socpus ID

56749163267 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/56749163267

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