Energy Transfer Under Electrical Excitation and Enhanced Electroluminescence in the Nanolaminate Yb,Er Co-Doped Al2O3 Films
Energy Transfer Under Electrical Excitation and Enhanced Electroluminescence in the Nanolaminate Yb,Er Co-Doped Al2O3 Films
复制标题
纳米层镱、铒共掺杂 Al2O3 薄膜中电激发下的能量转移和增强电致发光
DOI：
10.1002/pssr.201900137
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发表时间：
2019
影响因子：
2.8
通讯作者：
Sun Jiaming
中科院分区：
文献类型：
--
作者：
Yang Yang;Ouyang Zhongtao;Liu Jianzhao;Sun Jiaming
The energy transfer from Yb3+to Er3+ions under electrical excitation which enhances the Er‐related 1531 nm electroluminescence is evidenced, within the nanolaminate Yb,Er co‐doped Al2O3films fabricated by atomic layer deposition. The light‐emitting devices based on these nanolaminates present an external quantum efficiency up to 24% and the power efficiency of 2.8×10−3, ≈60% higher than the solely Er‐doped Al2O3device. The decay dynamics also support, with the radiative lifetime of the Yb3+emission reduced while that of Er3+emission rises. The Er3+and Yb3+ions are impact‐excited by hot electrons, which stem from Poole–Frenkel conduction mechanism in Al2O3matrix. This work certifies the potential of sensitizing Er3+ions by the adjacent Yb3+ions under electrical excitation, and applications of the rare earth‐doped nanolaminates in silicon‐based optoelectronics.
