| Multicolor, High-Efficiency, Nanotextures LEDs
Investigating Organization
Yale University
Principal Investigator(s)
Dr. Jung Han
Subcontractor
Brown University (A.V. Nurmikko)
Funding Source
Building Technologies Program/NETL
Award
DOE Share: $900,000; Contractor Share: $222,406
Contract Period
10/01/07 – 09/30/10
The goal of this project is to create a new class of active medium with an amplified radiation efficiency capable of near-unity electron-to-photon conversion for solid-state lighting applications. The target is to reach 120 lm/W luminous efficacy of at least 550 nm and produce intellectual impacts to the SSL technology based on three innovative concepts:
- Self-assembled synthesis of textured arrays of 1D InGaN nanorods for enhanced quantum confinement and radiation cross section,
- Near-field resonant enhancement of spontaneous and stimulated emission in eliciting maximum photon generation, and
- Concurrent nanoscale growth of InGaN on polar, non-polar, and semi-polar planes for enhanced multicolor emission.
The objective in Phase I is to achieve mechanistic understanding of nanphotonic enhancement and nanoscale synthesis science in order to consolidate experience and success pertaining to SSL. The objective of Phase II is to achieve near-unity IQE from self-assembled nanorod arrays on non-polar surfaces. The incorporation of such nanostructures active medium into electrically injected device, with above 120 lm/W luminous efficacy, will be the ultimate goal in Phase III.
The proposed research seeks to explore and integrate unique nanoscale phenomena pertaining to SSL applications, including nanostructure induced carrier confinement, enhanced sub-wavelength scattering and light extraction, single-crystalline dislocation-free synthesis of active medium, and simultaneous nano-epitaxy on polar, semi-polar, and non-polar templates.
Content dated 2/08 |
