Controllable Synthesis and Tunable Colors of 伪- and 尾-Zn2SiO4:Mn2+ Nanocrystals for UV and Blue Chip Excited White LEDs

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• 作者：Renguang Ye ; Guohua Jia ; Degang Deng ; Youjie Hua ; Zhiguang Cui ; Shilong Zhao ; Lihui Huang ; Huanping Wang ; Chenxia Li ; Shiqing Xu
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：June 2, 2011
• 年：2011
• 卷：115
• 期：21
• 页码：10851-10858
• 全文大小：1135K
• 年卷期：v.115,no.21(June 2, 2011)
• ISSN：1932-7455

文摘

Green- and yellow-emitting 伪- and 尾-Zn₂SiO₄:Mn²⁺ nanocrystals incorporated into glass ceramics have been selectively synthesized successfully by a conventional melt-quenching method. XRD, EPR, TEM, EDS, and electronic optical spectroscopy were employed to discriminate the formation of 伪- and 尾-Zn₂SiO₄:Mn²⁺ nanocrystals and further to elucidate the coordination environment of Mn²⁺ in the yellow-emitting Zn₂SiO₄:Mn²⁺ practical material. The combination of crystal field calculation with the experimental absorption and excitation spectra enables us to interpret optical spectroscopic features and therefore correlate the optical spectroscopy to the corresponding crystal structure. This work exemplified the correlation between the optical spectroscopy and coordination around the Mn²⁺ ion and also shed light on the application of glass ceramics containing 伪- and 尾-Zn₂SiO₄:Mn²⁺ nanocrystals for UV and blue chip excited white LEDs.