Hole injection from the sidewall of V-shaped pits into c-plane multiple quantum wells in InGaN light emitting diodes

Journal Article · Wed Oct 28 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4934503· OSTI ID:22492863

Wu, Xiaoming; Liu, Junlin; Jiang, Fengyi ^[1]

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1. National Engineering Technology Research Center for LED on Si Substrate, Nanchang University, Nanchang 330047 (China)

The role which the V-shaped pits (V-pits) play in InGaN/GaN multiple quantum well (MQW) light emitting diodes (LEDs) has been proposed to enable the formation of sidewall MQWs, whose higher bandgap than that of the c-plane MQWs is considered to act as an energy barrier to prevent carriers from reaching the dislocations. Here, with increasing proportion of current flowing via the V-pits, the emission of the c-plane MQWs broadens across the short-wavelength band and shows a blueshift successively. This phenomenon is attributed to hole injection from the sidewall of V-pits into the c-plane MQWs, which is a new discovery in the injection mechanism of InGaN/GaN MQW LEDs.

• OSTI ID: 22492863
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 16 Vol. 118; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CARRIERS
DISLOCATIONS
GALLIUM NITRIDES
HOLES
LIGHT EMITTING DIODES
QUANTUM WELLS
SPECTROSCOPY
WAVELENGTHS