Abstract
Single crystal of (Lu0.2Gd0.78Ce0.01Sm0.01)2SiO5 (LGSO:Ce,Sm) was grown by the Czochralski method at a temperature ca 1795°C. It has been found that the crystal retains the structure of the C2/c space group inherent in Lu2SiO5 (LSO) compound. When illuminated by an UV light in the region 350–390nm it exhibits an intense visible emission whose spectrum stretches from ca 400nm to 650nm and consists of a broad band Ce3+ luminescence and of much narrow bands of Sm3+ luminescence excited mainly by the Ce3+–Sm3+ energy transfer. Observed pronounced effect of the excitation wavelength on colour of emitted light, due to changes of spectral characteristics of the Ce3+ contribution, was attributed to selective excitation of two different Ce3+ sites available in the crystal lattice. It has been found that the intensity of the visible emission decreases with increasing temperature and becomes negligibly small at about 100°C.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
