Abstract
The photoluminescence modification of rare earth ions base on the photonic band gap engineering was extensively reported. In this work, the effect of up-converting luminescence suppression of Er3+ on the near infrared luminescence and cooperative energy transfer from Er3+ to Yb3+ was investigated in the YbPO4 inverse opals single-doped with Er3+ and co-doped with Nd3+ and Er3+. For the YbPO4:Er3+ inverse opals, when the photonic band gap is overlapped with the green or red up-converting luminescence of Er3+, the green or red up-converting luminescence of Er3+ was suppressed in the YbPO4:Er3+ inverse opals upon the 980 nm excitation, respectively. It is significative that the enhancement of near infrared luminescence of Er3+ was observed, which is attributed to the electron redistribution in the excited energy levels caused by the upconversion luminescence suppression in the YbPO4:Er3+ inverse opals. For the YbPO4:Nd3+,Er3+ inverse opals, the green upconversion and near infrared luminescence of Er3+ and the near infrared luminescence of Yb3+ were observed excited at 808 nm. The near infrared luminescence enhancement of Yb3+ was obtained due to the cooperative energy transfer enhancement from Er3+ to Yb3+ caused by the green upconversion luminescence suppression. The result is helpful to learn the relationship between upconversion and infrared luminescence in rare earth ions doped materials.
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