Advanced red phosphors for white light-emitting diodes. Issue 37 (9th September 2016)

• Record Type: Journal Article
• Authors: Li, Junhao; Yan, Jing; Wen, Dawei; Khan, Wasim Ullah; Shi, Jianxin; Wu, Mingmei; Su, Qiang; Tanner, Peter A.
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 37(2016)
• Page Start: 8611
• Page End: 8623
• Publication Date: 2016-09-09
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6tc02695h
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : 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. Abstract : 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.