Photoluminescence and structural analysis of samarium doped TÌO2 thin films and their applications to visible LEDs

Anatase and rutile phased samarium (Sm) doped titanium dioxide (TiO
₂
:Sm) thin films were fabricated by using laser ablation technique and post annealing at different annealing temperature. After estimation of luminescent property by measuring photoluminescence (PL), anatase phased TiO2: Sm sample which was annealed at 700
^o
C showed the most intense emission. In this work, we discuss the connection between coordination around Sm
³
+ ions and PL intensity, and optical and electrical properties of a n
⁺
-ITO/ TiO
₂
:Sm/p-NiO/p
⁺
-Si hetero junction LED preparing with optimal fabricating condition.