Energy-saving quality road lighting with colloidal quantum dot nanophosphors

Nanophotonics

article

Talha Erdem¹  Yusuf Kelestemur¹  Zeliha Soran-Erdem¹  Yun Ji²  Hilmi Volkan Demir¹ 

[1] Department of Electrical and Electronics Engineering, Department of Physics, and UNAM–Institute of Materials Science and Nanotechnology, Bilkent University;School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, Nanyang Technological University

关键词: quantum dots (QDs);    light-emitting diodes (LEDs);    outdoor lighting;    mesopic vision;    photometric design;   

DOI  :  10.1515/nanoph-2014-0016

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Here the first photometric study of road-lighting white light-emitting diodes (WLEDs) integrated with semiconductor colloidal quantum dots (QDs) is reported enabling higher luminance than conventional light sources, specifically in mesopic vision regimes essential to street lighting. Investigating over 100 million designs uncovers that quality road-lighting QD-WLEDs, with a color quality scale and color rendering index ≥85, enables 13–35% higher mesopic luminance than the sources commonly used in street lighting. Furthermore, these QD-WLEDs were shown to be electrically more efficient than conventional sources with power conversion efficiencies ≥16–29%. Considering this fact, an experimental proof-of-concept QD-WLED was demonstrated, which is the first account of QD based color conversion custom designed for street lighting applications. The obtained white LED achieved the targeted mesopic luminance levels in accordance with the road lighting standards of the USA and the UK. These results indicate that road-lighting QD-WLEDs are strongly promising for energy-saving quality road lighting.

【 授权许可】

CC BY