Analysis of lasers as a solution to efficiency droop in solid-state lighting
Abstract
This letter analyzes the proposal to mitigate the efficiency droop in solid-state light emitters by replacing InGaN light-emitting diodes (LEDs) with lasers. The argument in favor of this approach is that carrier-population clamping after the onset of lasing limits carrier loss to that at threshold, while stimulated emission continues to grow with injection current. A fully quantized (carriers and light) theory that is applicable to LEDs and lasers (above and below threshold) is used to obtain a quantitative evaluation. The results confirm the potential advantage of higher laser output power and efficiency above lasing threshold, while also indicating disadvantages including low efficiency prior to lasing onset, sensitivity of lasing threshold to temperature, and the effects of catastrophic laser failure. As a result, a solution to some of these concerns is suggested that takes advantage of recent developments in nanolasers.
- Authors:
-
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1236233
- Report Number(s):
- SAND-2015-8937J
Journal ID: ISSN 0003-6951; APPLAB; 608309
- Grant/Contract Number:
- AC04-94AL85000
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 107; Journal Issue: 14; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; light emitting diodes; charge injection; spontaneous emission; solid solutions; vertical cavity surface emitting lasers
Citation Formats
Chow, Weng W., and Crawford, Mary H. Analysis of lasers as a solution to efficiency droop in solid-state lighting. United States: N. p., 2015.
Web. doi:10.1063/1.4932582.
Chow, Weng W., & Crawford, Mary H. Analysis of lasers as a solution to efficiency droop in solid-state lighting. United States. https://doi.org/10.1063/1.4932582
Chow, Weng W., and Crawford, Mary H. Tue .
"Analysis of lasers as a solution to efficiency droop in solid-state lighting". United States. https://doi.org/10.1063/1.4932582. https://www.osti.gov/servlets/purl/1236233.
@article{osti_1236233,
title = {Analysis of lasers as a solution to efficiency droop in solid-state lighting},
author = {Chow, Weng W. and Crawford, Mary H.},
abstractNote = {This letter analyzes the proposal to mitigate the efficiency droop in solid-state light emitters by replacing InGaN light-emitting diodes (LEDs) with lasers. The argument in favor of this approach is that carrier-population clamping after the onset of lasing limits carrier loss to that at threshold, while stimulated emission continues to grow with injection current. A fully quantized (carriers and light) theory that is applicable to LEDs and lasers (above and below threshold) is used to obtain a quantitative evaluation. The results confirm the potential advantage of higher laser output power and efficiency above lasing threshold, while also indicating disadvantages including low efficiency prior to lasing onset, sensitivity of lasing threshold to temperature, and the effects of catastrophic laser failure. As a result, a solution to some of these concerns is suggested that takes advantage of recent developments in nanolasers.},
doi = {10.1063/1.4932582},
journal = {Applied Physics Letters},
number = 14,
volume = 107,
place = {United States},
year = {Tue Oct 06 00:00:00 EDT 2015},
month = {Tue Oct 06 00:00:00 EDT 2015}
}
Web of Science
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Works referencing / citing this record:
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