Abstract
The infrared to visible upconversion emission in Er3+ doped CaMoO4 phosphor has been investigated upon 980 nm diode laser excitation. The X-ray dffraction analysis reveals well crystalline nature and tetragonal phase structure of the prepared phosphor annealed at 800 °C. The Er3+ doped CaMoO4 phosphor has shown intense green upconversion emission upon 980 nm didode laser excitation. The green emission bands at 530 nm and 552 nm corresponds to the 2H11/2→4I15/2 and 4S3/2→4I15/2 electronic transitions, respectively of Er3+ ion. The very weak red emission band around 656 nm is assigned to the 4F9/2→4I15/2 transition of Er3+ ion. The CIE color coordinate exhibits the emission color in intense green region, indicating the use of present phosphor in display device applications.
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