%0 Journal Article
%T Growth, structure and upconversion mechanisms of Ba2ErCl7 crystal
%A Jianru Han
%A Guangyong Zhou
%A Shujun Zhang
%A Zhenxiang Cheng
%A Huanchu Chen
%J Chinese Science Bulletin
%@ 1861-9541
%D 2000
%I 
%R 10.1007/BF02884974
%X The methods to grow a novel upconversion crystal Ba2ErCl7 are reported in this note. Ba2ErCl7 material was synthesized with Er2O3, BaCl2ˇ¤2H2O and NH4Cl by using a so-called ˇ°direct synthesis methodˇ±. High quality Ba2ErCl7 single crystals with size up to 4 mmˇÁ8 mmˇÁ15 mm were grown by using the Czochralski and the Bridgman methods. Intense yellow-green luminescence was detected when the crystal was pumped by an 803 laser diode (LD). Transmittance spectrum was measured by using HITACH U-3500 spectrophotometer at room temperature for the first time, in which one can see that the transmittance is high in the range from 350 to 1 600 nm and the cut-off wavelength of the crystal was 230 nm. The upconversion mechanisms were discussed.
%K Ba2ErCl7
%K single crystal growth
%K transmittance spectra
%K upconversion mechanisms
%U http://link.springer.com/article/10.1007/BF02884974