Energy-saving quality road lighting with colloidal quantum dot nanophosphors

Creative Commons License

Erdem T., Kelestemur Y., SORAN ERDEM Z., Ji Y., Demir H. V.

NANOPHOTONICS, cilt.3, sa.6, ss.373-381, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 3 Sayı: 6
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1515/nanoph-2014-0016
  • Dergi Adı: NANOPHOTONICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.373-381
  • Anahtar Kelimeler: quantum dots (QDs), light-emitting diodes (LEDs), outdoor lighting, mesopic vision, photometric design, HIGH LUMINOUS EFFICACY, EMITTING-DIODES, DESIGN, PERFORMANCE, PHOSPHOR, FILMS, LEDS
  • Orta Doğu Teknik Üniversitesi Adresli: Hayır

Özet

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.