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Title: Combined selective emitter and filter for high performance incandescent lighting

Abstract

The efficiency of incandescent light bulbs (ILBs) is inherently low due to the dominant emission at infrared wavelengths, diminishing its popularity today. ILBs with cold-side filters that transmit visible light but reflect infrared radiation back to the filament can surpass the efficiency of state-of-the- art light-emitting diodes (LEDs). However, practical challenges such as imperfect geometrical alignment (view factor) between the filament and cold-side filters can limit the maximum achievable efficiency and make the use of cold-side filters ineffective. Here in this work, we show that by combining a cold-side optical filter with a selective emitter, the effect of the imperfect view factor between the filament and filter on the system efficiency can be minimized. We experimentally and theoretically demonstrate energy savings of up to 67% compared to a bare tungsten emitter at 2000 K, representing a 34% improvement over a bare tungsten filament with a filter. Our work suggests that this approach can be competitive with LEDs in both luminous efficiency and color rendering index (CRI) when using selective emitters and filters already demonstrated in the literature, thus paving the way for next-generation high-efficiency ILBs.

Authors:
ORCiD logo [1];  [1];  [1];  [2];  [3];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Device Research Lab., Dept. of Mechanical Engineering
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States). Dept. of Applied Physics and Materials Science
  3. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Research Lab. of Electronics, Inst. for Soldier Nanotechnology
Publication Date:
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States); Energy Frontier Research Centers (EFRC) (United States). Solid-State Solar-Thermal Energy Conversion Center (S3TEC)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); Fonds de Recherche du Quebec-Nature et Technologies (FRQNT)
OSTI Identifier:
1378450
Alternate Identifier(s):
OSTI ID: 1378119
Grant/Contract Number:  
FG02-09ER46577; SC0001299
Resource Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 111; Journal Issue: 9; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; Incandescent lighting; Light-emitting diodes; nanophotonics; selective emitter

Citation Formats

Leroy, Arny, Bhatia, Bikram, Wilke, Kyle, Ilic, Ognjen, Soljačić, Marin, and Wang, Evelyn N. Combined selective emitter and filter for high performance incandescent lighting. United States: N. p., 2017. Web. doi:10.1063/1.4989522.
Leroy, Arny, Bhatia, Bikram, Wilke, Kyle, Ilic, Ognjen, Soljačić, Marin, & Wang, Evelyn N. Combined selective emitter and filter for high performance incandescent lighting. United States. doi:10.1063/1.4989522.
Leroy, Arny, Bhatia, Bikram, Wilke, Kyle, Ilic, Ognjen, Soljačić, Marin, and Wang, Evelyn N. Fri . "Combined selective emitter and filter for high performance incandescent lighting". United States. doi:10.1063/1.4989522. https://www.osti.gov/servlets/purl/1378450.
@article{osti_1378450,
title = {Combined selective emitter and filter for high performance incandescent lighting},
author = {Leroy, Arny and Bhatia, Bikram and Wilke, Kyle and Ilic, Ognjen and Soljačić, Marin and Wang, Evelyn N.},
abstractNote = {The efficiency of incandescent light bulbs (ILBs) is inherently low due to the dominant emission at infrared wavelengths, diminishing its popularity today. ILBs with cold-side filters that transmit visible light but reflect infrared radiation back to the filament can surpass the efficiency of state-of-the- art light-emitting diodes (LEDs). However, practical challenges such as imperfect geometrical alignment (view factor) between the filament and cold-side filters can limit the maximum achievable efficiency and make the use of cold-side filters ineffective. Here in this work, we show that by combining a cold-side optical filter with a selective emitter, the effect of the imperfect view factor between the filament and filter on the system efficiency can be minimized. We experimentally and theoretically demonstrate energy savings of up to 67% compared to a bare tungsten emitter at 2000 K, representing a 34% improvement over a bare tungsten filament with a filter. Our work suggests that this approach can be competitive with LEDs in both luminous efficiency and color rendering index (CRI) when using selective emitters and filters already demonstrated in the literature, thus paving the way for next-generation high-efficiency ILBs.},
doi = {10.1063/1.4989522},
journal = {Applied Physics Letters},
number = 9,
volume = 111,
place = {United States},
year = {2017},
month = {9}
}

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