High performance incandescent lighting using a selective emitter and nanophotonic filters

Arny Leroy; Bikram Bhatia; Kyle Wilke; Ognjen Ilic; Marin Soljačić; Evelyn N. Wang

doi:10.1117/12.2275299

6 September 2017 High performance incandescent lighting using a selective emitter and nanophotonic filters

Arny Leroy, Bikram Bhatia, Kyle Wilke, Ognjen Ilic, Marin Soljačić, Evelyn N. Wang

Proceedings Volume 10369, Thermal Radiation Management for Energy Applications; 103690F (2017) https://doi.org/10.1117/12.2275299
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

Abstract

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.

Citation Download Citation

Arny Leroy, Bikram Bhatia, Kyle Wilke, Ognjen Ilic, Marin Soljačić, and 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); https://doi.org/10.1117/12.2275299

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available