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High performance incandescent light bulb using a selective emitter and nanophotonic filters

Leroy, Arny and Bhatia, Bikram and Wilke, Kyle and Ilic, Ognjen and Soljačić, Marin and Wang, Evelyn N. (2017) High performance incandescent light bulb using a selective emitter and nanophotonic filters. In: Thermal Radiation Management for Energy Applications. Proceedings of SPIE. No.10369. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 103690F. ISBN 978-1-5106-1196-2.

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Previous approaches for improving the efficiency of incandescent light bulbs (ILBs) have relied on tailoring the emitted spectrum using cold-side interference filters that reflect the infrared energy back to the emitter while transmitting the visible light. While this approach has, in theory, potential to surpass light-emitting diodes (LEDs) in terms of luminous efficiency while conserving the excellent color rendering index (CRI) inherent to ILBs, challenges such as low view factor between the emitter and filter, high emitter (>2800 K) and filter temperatures and emitter evaporation have significantly limited the maximum efficiency. In this work, we first analyze the effect of non-idealities in the cold-side filter, the emitter and the view factor on the luminous efficiency. Second, we theoretically and experimentally demonstrate that the loss in efficiency associated with low view factors can be minimized by using a selective emitter (e.g., high emissivity in the visible and low emissivity in the infrared) with a filter. Finally, we discuss the challenges in achieving a high performance and long-lasting incandescent light source including the emitter and filter thermal stability as well as emitter evaporation.

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Additional Information:© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE). This work was primarily supported as part of the Solid-State Solar Thermal Energy Conversion (S3TEC) Center, an Energy Frontier Research Center funded by the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award No. #DE-FG02-09ER46577. A. Leroy acknowledges funding received from the Fonds de Recherche du Québec – Nature et Technologies (FRQNT).
Funding AgencyGrant Number
Solid-State Solar Thermal Energy Conversion (S3TEC) CenterUNSPECIFIED
Department of Energy (DOE)DE-FG02-09ER46577
Fonds Québécois de la Recherche sur la Nature et les Technologies (FQRNT)UNSPECIFIED
Subject Keywords:Incandescent lighting, selective emitter, selective filter, nanophotonic filters, thermal stability, emitter evaporation
Series Name:Proceedings of SPIE
Issue or Number:10369
Record Number:CaltechAUTHORS:20180308-073223431
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Official Citation:Arny Leroy, Bikram Bhatia, Kyle Wilke, Ognjen Ilic, Marin Soljačić, Evelyn N. Wang, "High performance incandescent lighting using a selective emitter and nanophotonic filters", Proc. SPIE 10369, Thermal Radiation Management for Energy Applications, 103690F (6 September 2017); doi: 10.1117/12.2275299;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85191
Deposited By: Ruth Sustaita
Deposited On:08 Mar 2018 15:58
Last Modified:15 Nov 2021 20:26

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