Aqueous synthesis of panchromatic luminescent CdTeSe alloyed quantum dots

作者：Tang, Yanxia; Xu, Xianmei; Dong, Lihui; Zhou, Liya^*; Li, Bin

来源：Optik, 2015, 126(24): 5694-5697.

DOI：10.1016/j.ijleo.2015.09.092

• Optical materials
• Quantum dots
• Luminescence

Highly panchromatic luminescent CdTexSe1-x, alloy quantum dots (QDs) with emissions from blue to red regions are synthesized using a one-step method in aqueous solution with 3-mercaptopropionic acid (3-MPA) as stabilizer. The structure, shape, and spectral properties of these alloy QDs are investigated. The structure of the obtained CdTexSe1-x QDs is consistent with the zinc-blende crystal structure, with a nearly spherical shape having diameter of 4-7 nm. The CdTexSe1-x QDs exhibit an absorbance wavelength ranging from 460 nm to 700 nm, and the maximum quantum yield (QY) approaches 28% for CdTe0.5Se0.5 alloy QDs with a reflux time of 0.5 h. The emission wavelength of CdTexSe1-x QDs can be continuously tuned from 500 nm to 720 nm by controlling the size and composition of the alloy QDs, indicating their potential use in semiconductor-sensitized solar cells.

• 出版日期2015
• 单位广西大学