Details

Autor(en) / Beteiligte

• Jiang, Dongsheng
• Xia, Haiping
• Zhang, Jian
• Wang, Cheng
• Feng, Zhigang
• He, Shinan
• Tang, Qingyang
• Sheng, Qiguo
• Chen, Baojiu
• Jiang, Haochuan

Titel

Luminescent properties of Eu super(3+)-doped alpha -NaYF sub(4) single crystal under NUV-excitation

Ist Teil von

• Journal of modern optics, 2017-01, Vol.64 (2), p.164-169

Erscheinungsjahr

2017

Quelle

Taylor & Francis Journals Auto-Holdings Collection

Beschreibungen/Notizen

• This paper reports on successful synthesis of alpha -NaYF sub(4) single crystal doped with Eu super(3+) at various concentrations by a modified Bridgman method. The crystal structure is characterized by means of X-ray diffraction. The absorption spectra, excitation spectra and emission spectra were measured to investigate the optical properties of the single crystals. An intense red emission located at 611 nm with long lifetime of 9.03 ms was observed in single crystal under the excitation of 394 nm light. It benefits from the low maximum phonon energy of alpha -NaYF sub(4) single crystal matrix (390 cm super(-1)). The CIE chromaticity coordinate of the alpha -NaYF sub(4) single crystal doped Eu super(3+) in 4 mol% concentration was calculated (x = 0.6055, y = 0.388), which was close to the National Television Standard Committee standard values for red phosphor (x = 0.67, y = 0.33). All these spectral properties suggest that that this kind of fluoride crystal with high thermal stability and high efficiency of red emission may be used as potential red phosphors for optical devices.