Optical properties of InP/ZnS quantum dots deposited into nanoporous anodic alumina

3rd International School and Conference on Optoelectronics, Photonics, Engineering and Nanostructures (Saint Petersburg OPEN 2016)

Savchenko, S.S.^1 ; Vokhmintsev, A.S.^1 ; Weinstein, I.A.^1

NANOTECH Centre, Ural Federal University, Mira str., 19, Yekaterinburg

620002, Russia^1

关键词: Anodic aluminum oxide;    Chromaticity coordinates;    Colloidal quantum dots;    Correlated color temperature;    Excitonic transition;    Luminescence spectrum;    Nanoporous anodic aluminas;    Spectral characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/741/1/012151/pdf
DOI  :  10.1088/1742-6596/741/1/012151

来源: IOP

【 摘 要 】

Spectral characteristics of InP/ZnS core/shell colloidal quantum dots of two different sizes (QD-1 and QD-2) were investigated. Absorption and luminescence spectra were analyzed for a series of solutions with a concentration range from 0.04 to 40 g/l. Energies of the optical transitions are evaluated. The obtained values of 2.60 eV (QD-1) and 2.38 eV (QD-2) correspond to the InP first excitonic transitions while 4.06 (QD-2) and 4.70 eV (QD-1, QD-2) are assumed to be caused by the ZnS shell absorption. Structures based on nanoporous anodic aluminum oxide (AAO) with the QDs were synthesized via an electrochemical oxidation and ultrasonic-assisted deposition. Chromaticity coordinates and correlated color temperatures for all phosphors under study were calculated. The fabrication possibilities of InP/ZnS@AAO nanostructures with tunable emission color (including the border of white region) were shown.