【摘要】 介绍了调制阳光频率实现太阳光波上下量子剪裁的两种方式:掺杂稀土离子和微纳米结构化硅基材料。以Lu2O3为基质,采用共沉淀法制备了Tb3+和Yb3+共掺的下转换粉末;以NaYF4为基质,采用热水法制备了Er、Yb和Tm共掺的上转换粉末。实验证明Lu2O3:Tb3+,Yb3+纳米粉末中,一个高能光子可剪裁成2个974nm的近红外光子。而NaYF4:Er3+,Yb3+,Tm3+共掺的上转换材料也有显著的上转换效果,仅用1 122nm激光照射0.25cm2实验硅光电池片可增加电池光电流密度0.06mA/cm2。设计了具有纳米结构的PIN。简述了通过梯度掺杂制结增强光伏效应的原因。更多还原

【Abstract】 Two methods of realizing the upper and lower quantum cutting of sunlight wave by modulating the sunlight-frequency doped rare earth ions and micro-nano structured silicon-based materials are introduced in this paper.Based on Lu2O3,the low-conversion powder composed of Tb3+and Yb3+is prepared by co-precipitation method;By using NaYF4 as a foundation,the up-conversion powder containing Er、Yb and Tm is prepared by hot water extraction.The experiments show that a high-energy photon in the nano powder of Lu2O3:Tb3+,Yb3+can be cut into two 974 nm near-infrared photons.The co-doped material up-conversion NaYF4:Er3+,Yb3+,Tm3+has a significant effect on the up-conversion only by using the 1 122 nm laser light to irradiate 0.25cm2.The experiment silicon photovoltaic cells can increase the photocurrent density of battery with 0.06mA/cm2.The PIN silicon structure with nano-structural is designed.The reasons for enhancing photovoltaic effect by gradient doping have been discussed briefly.更多还原