Modeling of photoluminescence in laser-based lighting systems

Elisavet Chatzizyrli; Nadine Tinne; Roland Lachmayer; Jörg Neumann; Dietmar Kracht

doi:10.1117/12.2292735

1 December 2017 Modeling of photoluminescence in laser-based lighting systems

Elisavet Chatzizyrli, Nadine Tinne, Roland Lachmayer, Jörg Neumann, Dietmar Kracht

Proceedings Volume 10603, Photonics, Devices, and Systems VII; 1060318 (2017) https://doi.org/10.1117/12.2292735
Event: Photonics Prague 2017, 2017, Prague, Czech Republic

Abstract

The development of laser-based lighting systems has been the latest step towards a revolution in illumination technology brought about by solid-state lighting. Laser-activated remote phosphor systems produce white light sources with significantly higher luminance than LEDs. The weak point of such systems is often considered to be the conversion element. The high-intensity exciting laser beam in combination with the limited thermal conductivity of ceramic phosphor materials leads to thermal quenching, the phenomenon in which the emission efficiency decreases as temperature rises. For this reason, the aim of the presented study is the modeling of remote phosphor systems in order to investigate their thermal limitations and to calculate the parameters for optimizing the efficiency of such systems. The common approach to simulate remote phosphor systems utilizes a combination of different tools such as ray tracing algorithms and wave optics tools for describing the incident and converted light, whereas the modeling of the conversion process itself, i.e. photoluminescence, in most cases is circumvented by using the absorption and emission spectra of the phosphor material. In this study, we describe the processes involved in luminescence quantum-mechanically using the single-configurational-coordinate diagram as well as the Franck-Condon principle and propose a simulation model that incorporates the temperature dependence of these processes. Following an increasing awareness of climate change and environmental issues, the development of ecologically friendly lighting systems featuring low power consumption and high luminous efficiency is imperative more than ever. The better understanding of laser-based lighting systems is an important step towards that aim as they may improve on LEDs in the near future.

Citation Download Citation

Elisavet Chatzizyrli, Nadine Tinne, Roland Lachmayer, Jörg Neumann, and Dietmar Kracht "Modeling of photoluminescence in laser-based lighting systems", Proc. SPIE 10603, Photonics, Devices, and Systems VII, 1060318 (1 December 2017); https://doi.org/10.1117/12.2292735

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