Tai Yuping, Li Xinzhong, Du Xigang, Pan Bingli, Yuan Guanghui
School of Chemical Engineering and Pharmaceutics, Henan University of Science and Technology Luoyang 471003 P. R. China
School of Physics and Engineering, Henan University of Science and Technology Luoyang 471003 P. R. China.
RSC Adv. 2018 Jun 26;8(41):23268-23273. doi: 10.1039/c8ra04154g. eCollection 2018 Jun 21.
Ce-Yb co-doped transparent glass ceramics containing YAG nanocrystals were prepared by a conventional melt-quenching method. Broadband near infrared quantum cutting was achieved in the glass ceramics and proved to be a cooperative down-conversion process. Under 460 nm excitation, F to 5d electronic transitions occurred in Ce and transferred their energy to two neighboring Yb. The dependence of the luminescence spectra and decay curves on Yb concentration was investigated to understand the energy transfer mechanism. The energy transfer efficiency and the down-conversion quantum efficiency were estimated to be as high as 77.8% and 177.8%, respectively. This work will open a new route towards increased efficiency in silicon solar cells.
采用传统的熔体淬火法制备了含有YAG纳米晶体的铈-镱共掺杂透明玻璃陶瓷。在该玻璃陶瓷中实现了宽带近红外量子剪裁，且被证明是一个协同下转换过程。在460nm激发下，铈中发生F到5d的电子跃迁，并将其能量转移给两个相邻的镱。研究了发光光谱和衰减曲线对镱浓度的依赖性，以了解能量转移机制。能量转移效率和下转换量子效率估计分别高达77.8%和177.8%。这项工作将为提高硅太阳能电池的效率开辟一条新途径。
