Advanced red phosphors for white light-emitting diodes

White light-emitting diodes (WLEDs) with high luminous brightness, low energy consumption, long lifetime and environmental friendliness can be applied in various fields. However, low colour rendering index and high correlated colour temperature have seriously limited the quality of white light, resu...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2016, Vol.4 (37), p.8611-8623
Main Authors: Li, Junhao, Yan, Jing, Wen, Dawei, Khan, Wasim Ullah, Shi, Jianxin, Wu, Mingmei, Su, Qiang, Tanner, Peter A
Format: Article
Language:English
Subjects:
Color
Color temperature
Colour
Light-emitting diodes
Lighting
Luminescence
Phosphors
Rendering
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Summary:White light-emitting diodes (WLEDs) with high luminous brightness, low energy consumption, long lifetime and environmental friendliness can be applied in various fields. However, low colour rendering index and high correlated colour temperature have seriously limited the quality of white light, resulting from the deficiency of the red light component in commercial phosphors. New phosphors that can emit suitable red light are needed. The improvement of red emitters has gradually become a hot topic in WLED applications such as good colour rendering lighting and full colour displays. This review summarizes recent achievements concerning red phosphors mainly from three aspects. They are: intensifying absorption bands and reducing lattice defects to increase quantum efficiency; selecting an appropriate coordination environment and altering the lattice symmetry to fine-tune the luminescence spectra; and reducing the nonradiative transition rate and preventing charge imbalance of a luminescence centre to enhance thermal stability. White light-emitting diodes (WLEDs) with high luminous brightness, low energy consumption, long lifetime and environmental friendliness can be applied in various fields. In order to improve the quality of white light, red phosphors are necessary.
ISSN:2050-7526
2050-7534
DOI:10.1039/c6tc02695h