Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 4, Issue 37, Pages 8611-8623Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6tc02695h
Keywords
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Funding
- National Natural Science Foundation of China [U1301242]
- Guangdong Province [U1301242]
- Research Fund for the Doctoral Program of Higher Education of China (RFDP) [20130171130001]
- Natural Science Foundation of Guangdong Province [2016A030313305]
- Special Fund of Guangdong Province Project for Applied Science and Technology Research and Development [2016B090931007, 2015B090927002, 2013A09100010, 2012B09000026]
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White light-emitting diodes (WLEDs) with high luminous brightness, tow 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.
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