Journal
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
Volume 91, Issue -, Pages 470-475Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0921-5107(01)01006-6
Keywords
ZnSe; white; LED; dislocation; micro-defect
Ask authors/readers for more resources
A white LED based on II-VI compound materials has been developed. The optical output power and forward voltage of a typical ZnSe-based white LED lamp at a drive current of 20 mA are 4.3 mW and 2.6 V, respectively. Device lifetime (half-time) at I-F = 5 mA have exceeded 2 500 h at 60 degreesC, corresponding to an estimated lifetime of over 20 000 h at 20 degreesC. The most important defects limiting the lifetime are the dislocations and the stacking faults penetrating the active layer. Origins of these defects are the dislocations in the substrate as well as lattice irregularities at the epilayer/substrate interface. Though we have not yet found any evidence for microscopic defects in the cladding layers to take part in the degradation of our white LEDs, its possibility cannot be neglected. (C) 2002 Elsevier Science B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available