Dajian Wang
Tianjin University of Technology
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Publication
Featured researches published by Dajian Wang.
Applied Physics Letters | 2008
Liang Ma; Dajian Wang; Zhiyong Mao; Qifei Lu; Zhihao Yuan
We report a plant growth lamp utilizing near-ultraviolet light-emitting diode and A3MgSi2O8:Eu2+, Mn2+ (A=Ca,Sr,Ba) phosphors with emission spectra consisting of blue and red bands, which conform well to the action spectra of plants and absorption spectra of chlorophylls. Either peak positions of the two bands or intensity ratio of red to blue band can be tailored by tuning the compositions of the cations. Eu–Mn energy transfer in the phosphors was investigated on the bases of photoluminescence, life decay time, and microstructure. This functional solid-state lighting provides a simple, compact, and efficient solution to illuminator for plant cultivation.
Electrochemical and Solid State Letters | 2008
Liang Ma; Dajian Wang; Hongmei Zhang; Tiecheng Gu; Zhihao Yuan
A 505 nm-peaked photoluminescence of Ba 3 MgSi 2 O 8 :Eu 2+ , Mn 2+ phosphor for white-light-emitting diodes originating from an intermediate phase, Ba 2 SiO 4 :Eu 2+ , is found. The corresponding optical properties of this 505 nm-peaked photoluminescence resemble those of Ba 2 SiO 4 :Eu 2+ well. X-ray diffraction (XRD) results confirm the existence of Ba 2 SiO 4 in the Ba 3 MgSi 2 O 8 . The formation of Ba 2 SiO 4 is ascribed to the phase equilibrium during firing. Addition of flux inhibits the formation of intermediate phases and improves the crystallinity of Ba 3 MgSi 2 O 8 . Specifically, as a proper amount of NH 4 Cl is added, the 505 nm-peaked photoluminescence disappears and the XRD peaks attributed to Ba 2 SiO 4 disappear as well.
Chemical Communications | 2009
Zhiyong Mao; Dajian Wang; Qifei Lu; Wenhui Yu; Zhihao Yuan
Archive | 2008
Dajian Wang; Tiecheng Gu; Xuezheng Li; Hongmei Zhang; Liang Ma
Journal of Alloys and Compounds | 2010
Yanhua Liu; Zhiyong Mao; Wenhui Yu; Qifei Lu; Dajian Wang
Archive | 2008
Qifei Lu; Lingyun Liu; Dajian Wang; Zhihao Yuan; Limin Xu; Wenhui Yu
Archive | 2010
Peixin Zhang; Zhihao Yuan; Tiecheng Gu; Zhiyong Mao; Yachang Jiang; Dajian Wang; Wenhui Yu; Jinhui Peng; Shougen Yin; Hongmei Zhang; Qifei Lu; Lan Li
Optoelectronics Letters | 2009
Lingyun Liu; Dajian Wang; Zhiyong Mao; Yanhua Liu; Xuezheng Li; Qifei Lu
Archive | 2009
Dajian Wang; Zhiyong Mao; Yanhua Liu; Lingyun Liu; Xuezheng Li; Wenhui Yu
Archive | 2008
Dajian Wang; Peixin Zhang; Zhihao Yuan; Jinhui Peng; Lan Li; Zhiyong Mao; Tiecheng Gu; Yachang Jiang; Qifei Lu; Wenhui Yu; Shougen Yin; Hongmei Zhang