Fabrication of highly a-axis-oriented Gd2O3:Eu3+ thick film and its luminescence properties

✍ Scribed by Xiaolin Liu; Feng Zhou; Mu Gu; Shiming Huang; Bo Liu; Chen Ni

• Book ID: 104075387
• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 496 KB
• Volume: 31
• Category: Article
• ISSN: 0925-3467
• DOI: 10.1016/j.optmat.2008.02.001

✦ Synopsis

Dense and transparent Gd 2 O 3 :Eu 3+ thick films were prepared from the inorganic salt and 2-methoxyethanol solution containing polyvinylpyrrolidone (PVP) via sol-gel technique. It was found that the films exhibited a preferred a-axis orientation, the preferential orientation parameter was 83.8%, and they possessed of a high intensity ratio of 5 D 0 ? 7 F 2 / 5 D 0 ? 7 F 1 . The correlation between structure and luminescent properties of the film was tentatively discussed. These results indicated that PVP played an important role in the formation of Gd 2 O 3 :Eu 3+ thick films, suppressing the stress, changing the growth direction of the films from h1 1 1i to h1 0 0i orientation and improving the covalency of Eu-O bonds and the energy transfer from S 6 sites to C 2 sites. The Gd 2 O 3 :Eu 3+ thick film prepared with PVP showed a superior luminescent property, which implies that it will have promising applications in high-spatial-resolution X-ray imaging and flat panel display devices.