Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/84758
標題: High performance of Ga-doped ZnO transparentconductive layers using MOCVD for GaN LEDapplications
Project: Optics Express, Volume 21, Issue 12.
摘要: 
High performance of Ga-doped ZnO (GZO) prepared usingmetalorganic chemical vapor deposition (MOCVD) was employed in GaNblue light-emitting diodes (LEDs) as transparent conductive layers (TCL).By the post-annealing process, the annealed 800°C GZO films exhibited ahigh transparency above 97% at wavelength of 450 nm. The contactresistance of GZO decreased with the annealing temperature increasing. Itwas attributed to the improvement of the GZO crystal quality, leading to anincrease in electron concentration. It was also found that some Zn atomcaused from the decomposition process diffused into the p-GaN surface ofLED, which generated a stronger tunneling effect at the GZO/p-GaNinterface and promoted the formation of ohmic contact. Moreover, contrastto the ITO-LED, a high light extraction efficiency of 77% was achieved inthe GZO-LED at injection current of 20 mA. At 350 mA injection current,the output power of 256.51 mW of GZO-LEDs, corresponding to a 21.5%enhancement as compared to ITO-LEDs was obtained; results are promisingfor the development of GZO using the MOCVD technique for GaN LEDapplications.
URI: http://hdl.handle.net/11455/84758
DOI: 10.1364/OE.21.014452
Appears in Collections:精密工程研究所

Files in This Item:
File Description SizeFormat Existing users please Login
2014-3-4-3-5-2.pdf859.46 kBAdobe PDFThis file is only available in the university internal network    Request a copy
Show full item record
 

Google ScholarTM

Check

Altmetric

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.