Journal
RSC ADVANCES
Volume 6, Issue 89, Pages 86285-86296Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra19584a
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Funding
- Natural Science Foundation of Zhejiang Province [LR15E020001]
- National Natural Science Foundation of China [21271170, 61372025, 51402077, 51572065]
- 151 talent's projects in the second level of Zhejiang Province
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Currently, the major commercial white light-emitting diodes consist of a blue-emitting chip and Y3Al5O12:Ce3+ yellow phosphor. However, the shortage of a red emitting component in the constructed device makes it difficult to realize warm white light with a high color-rendering index and low correlated color temperature. In this mini-review article, we provide an overview of recent progresses in developing Mn4+ doped red phosphors for promising applications in warm white light-emitting diodes. Firstly, the spectroscopic properties of Mn4+ in solids, including electronic and vibronic energy-level structures, crystal-field parameters as well as thermal stability, were briefly discussed. And then the related physical and chemical synthesis strategies were introduced in detail. Afterwards, Mn4+ doped phosphors, such as oxides, fluorides as well as glass ceramic composites, and their impact on improving the photoelectric performance of white light-emitting diodes were summarized. Finally, several challenges and perspectives for exploring novel and high-performance Mn4+ doped red phosphors will be presented.
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