Direct band gap white light emission from charge carrier diffusion induced nanowire light-emitting diodes
Zhao, Yue LU ; Adham, Kristi LU ; Hessman, Dan LU and Borgström, Magnus T. LU
(2024)
In Nano Energy
132.
- Abstract
Light-emitting diodes (LEDs) have been investigated during the past decades, for which a major challenge is total internal reflection that limits the light extraction efficiency. ‘Nanotree’ LEDs elegantly solve this bottleneck. Lower band gap nanowire branches are grown on higher band gap core wires. Charge carriers diffuse into the branches and recombine there. Total internal reflection is impeded since the branch diameter is much smaller than the wavelength of light emitted from the material. Our ‘nanotree’ LEDs show direct band gap emission with color corresponding to the semiconductor materials composition. By stronger biasing of the core wires, we provoke white light emission without down-converting phosphors. The concept of... (More)
Light-emitting diodes (LEDs) have been investigated during the past decades, for which a major challenge is total internal reflection that limits the light extraction efficiency. ‘Nanotree’ LEDs elegantly solve this bottleneck. Lower band gap nanowire branches are grown on higher band gap core wires. Charge carriers diffuse into the branches and recombine there. Total internal reflection is impeded since the branch diameter is much smaller than the wavelength of light emitted from the material. Our ‘nanotree’ LEDs show direct band gap emission with color corresponding to the semiconductor materials composition. By stronger biasing of the core wires, we provoke white light emission without down-converting phosphors. The concept of nanoscale-enhanced charge carrier diffusion LEDs may be a game changer for industrial LED design.
(Less)
- author
- Zhao, Yue
LU
; Adham, Kristi
LU
; Hessman, Dan
LU
and Borgström, Magnus T.
LU
- organization
- publishing date
- 2024-12-15
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Electroluminescence, External quantum efficiency, Nanowire light-emitting diodes, Total internal reflection
- in
- Nano Energy
- volume
- 132
- article number
- 110400
- pages
- 7 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85207649107
- ISSN
- 2211-2855
- DOI
- 10.1016/j.nanoen.2024.110400
- language
- English
- LU publication?
- yes
- additional info
- Publisher Copyright: © 2024 The Authors
- id
- bc27119c-e1be-4210-9859-36fd9fe30e87
- date added to LUP
- 2024-11-27 21:42:49
- date last changed
- 2025-04-04 13:51:35
@article{bc27119c-e1be-4210-9859-36fd9fe30e87,
abstract = {{<p>Light-emitting diodes (LEDs) have been investigated during the past decades, for which a major challenge is total internal reflection that limits the light extraction efficiency. ‘Nanotree’ LEDs elegantly solve this bottleneck. Lower band gap nanowire branches are grown on higher band gap core wires. Charge carriers diffuse into the branches and recombine there. Total internal reflection is impeded since the branch diameter is much smaller than the wavelength of light emitted from the material. Our ‘nanotree’ LEDs show direct band gap emission with color corresponding to the semiconductor materials composition. By stronger biasing of the core wires, we provoke white light emission without down-converting phosphors. The concept of nanoscale-enhanced charge carrier diffusion LEDs may be a game changer for industrial LED design.</p>}},
author = {{Zhao, Yue and Adham, Kristi and Hessman, Dan and Borgström, Magnus T.}},
issn = {{2211-2855}},
keywords = {{Electroluminescence; External quantum efficiency; Nanowire light-emitting diodes; Total internal reflection}},
language = {{eng}},
month = {{12}},
publisher = {{Elsevier}},
series = {{Nano Energy}},
title = {{Direct band gap white light emission from charge carrier diffusion induced nanowire light-emitting diodes}},
url = {{http://dx.doi.org/10.1016/j.nanoen.2024.110400}},
doi = {{10.1016/j.nanoen.2024.110400}},
volume = {{132}},
year = {{2024}},
}