Investigation of the mechanism of upconversion luminescence in Er3+/Yb3+ co-doped Bi2Ti2O7 inverse opal

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2013,（4）
• 页码范围: 60-63
• 页数: 4页
• 语种: 英文
• DOI: 10.3788/COL201311.041602

摘要

Three-dimensional-ordered Yb/Er co-doped Bi2Ti2O7 inverse opal,powder,and disordered reference samples are prepared and their upconversion (UC) emission properties and mechanisms are investigated.Significant suppression of UC emission is detected when the photonic band-gaps overlap with Er3+ UC green emission bands.Interestingly,green and red UC emissions follow a two-photon process in the powder sample but a three-photon one in the inverse opal.