Effect of photonic bandgap on upconversion emission in YbPO4:Er inverse opal photonic crystals.
We obtained upconversion (UC) light-emitting photonic materials (YbPO(4):Er) with an inverse opal structure by the self-assembly technique in combination with a solgel method. The effect of the photonic stopband on the UC luminescence of the (2)H(11/2), (4)S(3/2)→(4)I(15/2), and (4)F(9/2)→(4)I(15/2) transitions of Er(3+) has been observed in the inverse opals of the Er(3+)-doped YbPO(4). Significant suppression of the UC emission was detected if the photonic bandgap overlapped with the Er(3+) ions emission band, while enhancement of the UC emission occurs if the emission band appears at the edge of the bandgap.
College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.
Zhengwen
Z
Yang
Kan
K
Zhu
Zhiguo
Z
Song
Dacheng
D
Zhou
Zhaoyi
Z
Yin
Jianbei
J
Qiu