Energy transfer to enhance the characteristics emission from lanthanide-doped nanocrystals

33rd International Conference on the Physics of Semiconductors

Wu, Yangqing^1 ; Lin, Shaobing^1 ; Zhang, Xiaowei^1 ; Xu, Jun^1 ; Chen, Kunji^1

School of Electronic Science and Engineering, National Laboratory of Solid State Microstructures, Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing

210093, China^1

关键词: Characteristic emission;    Doped nanocrystals;    Effective energy;    Energy transfer efficiency;    Near-infrared emissions;    SnO2 nanocrystals;    Three orders of magnitude;    Up-conversion emission;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/864/1/012067/pdf
DOI  :  10.1088/1742-6596/864/1/012067

来源: IOP

【 摘 要 】

We report the improved characteristic emission of Er3+ions by co-doping wide-band-gap SnO2nanocrystals (NCs), which as sensitizers of Er3+ions. It is found that the Er3+-related near infrared emission is enhanced by three orders of magnitude, which can be attributed to the effective energy transfer process occurs between SnO2nanocrystals and Er3+ions. Meanwhile, we also prepare the Er3+-Yb3+co-doped NaYF4NCs with Gd3+dopant ions to obtain high-efficiency up-conversion emission by energy transfer from Yb3+to Er3+. We demonstrate experimentally that Gd3+dopant ions play key roles in the formation of β-NaYF4NCs which can improve the energy transfer efficiency from Yb3+to Er3+obviously. Consequently, the up-conversion emission is enhanced by more than five times.