Upconversion color tunability and white light generation in Tm3+/Ho3+/Yb3+ doped aluminum germanate glasses

Upconversion color tunability and white light generation in Tm3+/Ho3+/Yb3+ doped aluminum germanate glasses
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Tm3 /Ho3 /Yb3 掺杂锗酸铝玻璃中的上转换颜色可调性和白光生成

DOI:
10.1016/j.optmat.2009.11.013
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发表时间:
2010-02
期刊:
影响因子:
3.9
通讯作者:
H. Gong
H. Gong
中科院分区:
材料科学3区
文献类型:
--
作者:
H. Lin;E.Y.B. Pun;X. Zhao;D.L. Yang;H. Gong

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制备并表征了具有上转换荧光的Tm ~(3+)/Ho ~(3+)/Yb ~(3+)三掺杂锗酸铝玻璃。观察到了Tm 3+的高效三光子蓝色上转换发射以及Ho 3+的双光子绿色和红色上转换荧光。Ho 3+的强红色发射(其比绿色发射高8倍以上)在实现高显色指数方面是期望的。通过改变974 nm激光二极管的激发功率,获得了一系列相关色温(CCT)范围较大的白色荧光,不同CCT的荧光颜色可以从黄白色调谐到暖白色、纯白色、冷白色和蓝白色。通过泵浦功率调节的上转换颜色可调谐性将促进三维固态显示和上转换照明器件的发展。
Tm3+/Ho3+/Yb3+triply doped aluminum germanate glasses exhibiting multicolor upconversion fluorescences have been fabricated and characterized. Efficient three-photon blue upconversion emission of Tm3+and two-photon green and red upconversion fluorescences of Ho3+have been observed. The strong red emission of Ho3+, which is more than eight times higher than that of the green emission, is desirable in achieving high color rendering index. By varying the excitation power of the 974nm wavelength laser diode, a series of white fluorescences with a large range of correlated color temperature (CCT) was obtained, and the fluorescence colors can be tuned from yellowish white to warm white, pure white, cool white, and bluish white with different CCT. The upconversion color tunability via pump power adjustment will promote the development of three-dimensional solid-state displays and upconversion illumination devices.
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