Tao Li, Xu Wen, Bai Xue, Xu Sai, Song Hongwei
J Nanosci Nanotechnol. 2014 May;14(5):3627-30. doi: 10.1166/jnn.2014.8004.
In this letter, visible to near-infrared (NIR) quantum cutting (QC) luminescence of -20 nm LaF3:Sm3+ (0.2-1 mol%) nanocrystals (NCs) was first studied. A number of novel NIR QC emissions (850-2000 nm) were distinguished. The results show that the QC emission lines and populating channels depend strongly on Sm3+ concentration due to the cross relaxation processes. The overall QC efficiency is as high as -193% in LaF3:Sm3+ (0.4 mol%) NCs, which shows that NIR QC of Sm3+ is of great significance for enhancing the efficiency of solar cells.
在这封信中，首次研究了-20纳米的LaF3:Sm3+（0.2 - 1摩尔%）纳米晶体（NCs）从可见光到近红外（NIR）的量子切割（QC）发光。区分出了许多新颖的近红外量子切割发射（850 - 2000纳米）。结果表明，由于交叉弛豫过程，量子切割发射线和填充通道强烈依赖于Sm3+浓度。在LaF3:Sm3+（0.4摩尔%）纳米晶体中，整体量子切割效率高达-193%，这表明Sm3+的近红外量子切割对于提高太阳能电池效率具有重要意义。
