Growth and characterization of neodymium and ytterbium doped barium chloride dihydrate single crystals

다국어 초록 (Multilingual Abstract)

Pure, Nd doped and Nd:Yb co-doped barium chloride dihydrate (BaCl2$2H2O) single crystals were grown and analyzed with various characterization techniques. The measured unit cell parameters show that the grown crystals belong to monoclinic system. Powder X-ray diffraction spectra indicates that the dopants enhance (2 1 0) orientation of BaCl2$2H2O crystal. X-ray rocking curves have been recorded to analyze the crystallinity of the grown single crystals. Optical absorption spectra of the grown crystals contain strong absorption bands in infrared region. Spectral overlap of absorption bands of Yb3þ and Nd3þ ion around 850 nme1060 nm in Nd:Yb co-doped single crystal indicates the prospect of energy transfer between them. A significant enhancement has been observed in the photoluminescence spectrum of Nd:Yb codoped single crystal recorded with 244 nm laser excitation. Photon upconversion ability of the crystals was tested using Nd:YAG laser of wavelength 1064 nm. An unusual upconverted green emission from pure centrosymmetric BaCl2$2H2O single crystal has been observed. The energy of upconverted green light of Nd:Yb co-doped barium chloride dihydrate single crystal is higher which may be due to energy transfer occurred between Yb3þ and Nd3þ ions. FTIR and FT-Raman spectral analyses were carried out to study the vibrational modes of pure, Nd doped and Nd:Yb co-doped BaCl2$2H2O single crystals.

참고문헌 (Reference)

1 J. Holsa, "White up-conversion luminescence of NaYF4:Yb3+, Pr3+, Er3+" 36 : 1627-1630, 2014

2 B. Ahrens, "Upconverted fluorescence in Nd3+-doped barium chloride single crystals" 21 : 125501-125505, 2009

3 F. Auzel, "Upconversion and anti-stokes processes with f and d ions in solids" 104 : 139-174, 2004

4 Y. S. Jain, "The infrared and Raman spectra of BaCl2$2H2O powder" 30 : 440-443, 1976

5 M. Hasmuddin, "Structural, spectroscopic, optical, dielectric and mechanical study of pure and L-Proline doped ammonium dihydrogen phosphate single crystals" 123 : 376-384, 2014

6 A. Miguel, "Spectroscopy and energy transfer in Nd3+/Yb3+ codoped chalcohalide glasses" 377 : 110-113, 2013

7 Z. Yan, "Scintillation properties of improved 5%Eu2+- doped BaCl2 single crystal for X-ray and g-ray detection" 698 : 7-10, 2013

8 A. D. Sontakke, "Phonon assisted effective non-resonant energy transfer based 1 mm luminescence from Nd3+-Yb3+ codoped zinc-borobismuthate glasses" 138 : 229-234, 2013

9 J. A. F. Silva, "Order-disorder phase transition in BaCl2$2H2O crystals" 19 : 3797-3803, 1986

10 L. Dixie, "Luminescence and X-ray phosphor properties of samarium and lanthanum -doped cubic barium chloride" 8 : 132-135, 2011

11 Peng Du, "Infrared-to-visible upconversion emission of Er3+/Yb3+-codoped SrMoO4 phosphors as wide-range temperature sensor" 한국물리학회 15 (15): 1576-1579, 2015

12 R. Dey, "Green upconversion emission in Nd3+-Yb3+-Zn3+:Y2O3 phosphor" 99 : 288-291, 2012

13 K. Fukushima, "Far-infrared spectra and lattice vibrations of barium chloride dihydrate" 43 : 690-697, 1970

14 J. Holsa, "Enhancement of the up-conversion luminescence from NaYF4:Yb3+,Tb3+" 439 : 20-23, 2014

15 J. M. Meijer, "Downconversion for solar cells in YF3+:Nd3+,Yb3+" 81 : 035107-035115, 2010

16 C. Lorbeer, "Charge compensation in RE3+ (RE=Eu, Gd) and M+ (M=Li, Na, K) co-doped alkaline earth nanofluorides obtained by microwave reaction with reactive ionic liquids leading to improved optical properties" 2 : 9439-9450, 2014

17 T. Li, "Agarwal, Infrared-to-visible up-conversion luminescence of CaIn2O4 co-doped with RE3+/Yb3+ (RE=Tm, Pr, Nd)" 312 : 284-286, 2014