Abstract
The transparent colloidal solution of LaPO4:Ce,Tb nano-phosphor is synthesized from lanthanum acetate, cerium acetate, terbium acetate and trimethyl phosphate by the solvothermal reaction at 140°C in the mixture of water and methanol. The green photoluminescence (PL) due to the f-f transition of Tb3+ is observed by exciting the d-f transition of Ce 3+, followed by the energy transfer from Ce3+ to Tb 3+. The surface modification of LaPO4:Ce,Tb nano-phosphor powder by lauryl phosphate increases the PL intensity by a factor of 18. The surface modification is effective for LaPO4:Ce, but not for LaPO 4:Tb. These results suggest that the surface-passivation plays a significant role in the suppression of energy loss and the higher site-symmetry around Ce3+.
Original language | English |
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Pages | 513-516 |
Number of pages | 4 |
Publication status | Published - 2005 Dec 1 |
Event | IDW/AD'05 - 12th International Display Workshops in Conjunction with Asia Display 2005 - Takamatsu, Japan Duration: 2005 Dec 6 → 2005 Dec 9 |
Other
Other | IDW/AD'05 - 12th International Display Workshops in Conjunction with Asia Display 2005 |
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Country/Territory | Japan |
City | Takamatsu |
Period | 05/12/6 → 05/12/9 |
ASJC Scopus subject areas
- Engineering(all)