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在单一基质玻璃中实现可见发射调谐的部分探索研究

已有 2702 次阅读 2016-9-2 11:25 |个人分类:communication|系统分类:科研笔记


1.http://www.sciencedirect.com/science/article/pii/S0272884214013534

Multi-wavelength-driven solar spectral conversion in P2O5–ZnO–Li2O glasses for improving greenhouse photosynthetic activity

Abstract

The highest quantum efficiency among amorphous materials was recently observed in thens2-type Sn2+ activators doped ZnO–P2O5 glass system, which is comparable to the MgWO4 crystal. In this paper, Mn2+/Sn2+-codoped low-melting 44P2O5–36ZnO–20Li2O (PZL) glasses were prepared by the melt-quenching method to explore blue and red emission materials for greenhouse. Photoluminescence properties of the PZL glasses were investigated systematically by decay curves and absorption, excitation, and emission spectra. The glasses have high optical transparency in the visible region, and can emit intense red light excited at 300, 354, 409, and 505 nm. Significantly, upon 300 nm excitation, dual blue/red emissions were achieved. Moreover, the ratio of red to blue light could be tuned by adjusting the energy-transfer (ET) of Sn2+→Mn2+ through simply adjusting the content of Mn2+. Our research extends the utilization of solar energy in glass greenhouse for plant cultivation.


2. http://jss.ecsdl.org/content/3/5/R89.short


Deep-UV-Driven Emission-Tailorable Borosilicate Glasses by Utilization of Sn2+ Cations as Versatile Energy-Transfer Establishers


Abstract

The emission properties of ns2-type Sn2+ emission centers were demonstrated in CaO-B2O3-SiO2 glasses. The broad excitation bands, which are assumed to be composed of S1 and S2 sub-bands, correlate strongly with Sn2+ doping content. The blue Sn2+ emission bands can be tailored by tuning Sn2+ coordinate field. Significant enhancement of Sn2+ emission was observed in B2O3-rich glasses. Owing to energy-transfer (ET) from Sn2+ to Tb3+/Mn2+, significant enhancement of Mn2+ and Tb3+ emissions (32 times for Tb3+) were obtained. Moreover, a wide-range-adjustable full-color emitting was achieved via tuning the ET ratio of Sn2+→Mn2+ to Sn2+→Tb3+and modifying glass structures. Our research extends the understanding of the interactions between Sn2+ and Mn2+/Tb3+ in amorphous materials, and these deep-light-induced glasses show potential application in lighting and display fields.

3.http://www.sciencedirect.com/science/article/pii/S0022309313006078

Tunable full-color emitting borosilicate glasses via utilization of Ce3 + ions as multiple energy transfer contributors

Highlights


Ce3 + ions played a role as sensitizers in improving the luminescence of multi-activators.

Dual energy-transfer of Ce3 + → Tb3 + and Ce3 + → Mn2 + was systematically investigated.

Tunable full-color emitting was obtained in Ce3 +–Mn2 +–Tb3 + co-activated glasses.


Abstract

A series of trichromatic/white-emitting 15CaO–55B2O3–30SiO2 glasses co-doped with Ce3 +/Tb3 +/Mn2 + were synthesized in air by a melt-quenching method. Ce3 + ions played a role as sensitizers in improving the photoluminescence performance of multi-activators. Dual energy transfer (ET) processes of Ce3 + → Tb3 + and Ce3 + → Mn2 + were observed in Ce3 +–Mn2 +–Tb3 + co-activated glasses. The hues of the fabricated glasses covered the regions from blue, green, to orange–red, and a wide-range-tunable warm white light emission was realized by tuning the ET proportion from excitation source to the co-activated Mn2 + and Tb3 + ions through utilizing Ce3 + ions as the multi-sensitizers. It indicates that these glasses are expected to be potential phosphor candidates for deep UV-pumped white-LED.


Efficient multi-wavelength-driven spectral conversion from ultraviolet to visible in transparent borosilicate glasses


Abstract

The emission properties of borosilicate glasses containing Mn2+ and rare-earth (RE) ions (Sm3+, Eu2+, Eu3+, Tb3+) were demonstrated. The self-reduction from Eu3+ to Eu2+ was observed and discussed. Results indicate that the red fluorescence of Eu3+ and blue emission from Eu2+ can be tailored by tuning the ratio of B2O3 to CaO. Moreover, by co-doping Mn2+ with Sm3+ and Eu2+,3+, a flexible prototype is proposed to improve photosynthesis of green plants by turning ultraviolet (UV) light into dual red/blue lights. Besides, the energy-transfer (ET) of Tb3+→Sm3+ was investigated, and a wide-range-tunable full-color-emitting was obtained in Eu2+–Tb3+–Sm3+ tri-doped glasses via precisely tuning the co-activators. Our research extends the potential application of these glasses in greenhouse for plant cultivation and general illumination.



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