Full-Color Inorganic Carbon Dot Phosphors for White-Light-Emitting Diodes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

104 Scopus Citations
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Author(s)

  • Zhen Tian
  • Xutao Zhang
  • Di Li
  • Ding Zhou
  • Pengtao Jing
  • Dezhen Shen
  • Songnan Qu
  • Radek Zboril

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number1700416
Journal / PublicationAdvanced Optical Materials
Volume5
Issue number19
Online published28 Jul 2017
Publication statusPublished - 2 Oct 2017

Abstract

Light-emitting carbon dots (CDots) are widely investigated due to their distinct merits. However, it is still a challenge to modulate their bandgap emissions and conquer their aggregation-induced luminescence quenching to achieve full-color highly emissive CDot-based phosphors. Herein, this study proposes an approach toward realization of full-color emissive CDots from two common precursors, citric acid and urea, through employing three different solvents (water, glycerol, and dimethylformamide) and their combinations in a solvothermal synthesis. Employing sodium silicate solution, this study further demonstrates the microwave-assisted method allowing to incorporate CDots into a silica network, which effectively prevents aggregation of CDots and results in strongly luminescent full-color inorganic CDot phosphors with photoluminescence quantum yields of 30–40%. Through deposition of the red- and green-emitting CDot phosphors on blue-emitting InGaN chips, white-light-emitting diodes are fabricated with Commission Internationale de L'Eclairage of (0.34, 0.31) and the color rendering index of 82.4, indicating their promising application for solid-state lighting.

Research Area(s)

  • carbon dots, full-color emission, phosphors, sodium silicate, white-light-emitting devices

Citation Format(s)

Full-Color Inorganic Carbon Dot Phosphors for White-Light-Emitting Diodes. / Tian, Zhen; Zhang, Xutao; Li, Di; Zhou, Ding; Jing, Pengtao; Shen, Dezhen; Qu, Songnan; Zboril, Radek; Rogach, Andrey L.

In: Advanced Optical Materials, Vol. 5, No. 19, 1700416, 02.10.2017.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review