Perovskite-on-polymer microspheres for optimized solid state lighting

Ziqian He; Caicai Zhang; Yajie Dong; Shin-Tson Wu

doi:10.1117/12.2531106

30 August 2019 Perovskite-on-polymer microspheres for optimized solid state lighting

Ziqian He, Caicai Zhang, Yajie Dong, Shin-Tson Wu

Proceedings Volume 11104, Current Developments in Lens Design and Optical Engineering XX; 111040L (2019) https://doi.org/10.1117/12.2531106
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States

Abstract

Remote downconverters such as phosphors or quantum dots that are physically separated from the blue light-emitting diode (LED) chips can strongly enhance the luminescence efficiency of solid-state lighting (SSL) and liquid-crystal displays (LCDs) because of their reduced light reabsorption. However, the high cost of traditional remote downconverters has limited their wide adoptions in these applications. Herein, we report a one-step, general synthesis method that can convert commercial light-diffusing polymer microspheres into highly luminescent perovskite-based downconverters at an extremely low cost. Involving a quick antisolvent-induced heterogeneous nucleation, our method creates well-dispersed perovskite nanoparticles anchored onto polymer microspheres and the whole process takes only several seconds at room temperature without any complex experimental setups. Significantly, the as-synthesized perovskite-on-polymer microspheres offer widely tunable, highly saturated colors with light-diffusing capability. The pure green-emitting CsPbBr₃ manifests a high PL quantum yield of 70.6% and superior stability in water is also demonstrated. With these very saturated colors, we propose two configurations of integrating these microspheres into SSL systems. Further optimizations demonstrate that highly efficient, excellent color-rendering, and circadian lighting can be achieved. Thus, these luminescent microspheres hold great promise to be adopted as a low-cost, high-quality replacement for the traditional, expensive remote downconverters in SSL, LCDs and beyond.

Conference Presentation

Citation Download Citation

Ziqian He, Caicai Zhang, Yajie Dong, and Shin-Tson Wu "Perovskite-on-polymer microspheres for optimized solid state lighting", Proc. SPIE 11104, Current Developments in Lens Design and Optical Engineering XX, 111040L (30 August 2019); https://doi.org/10.1117/12.2531106

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