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A Comparative Study of Optical Properties of Thin Films of MPS-encapsulated CdS Quantum Dots and SiO 2 /MPS-encapsulated CdS Quantum Dots Mixture
Optics and Spectroscopy ( IF 0.8 ) Pub Date : 2020-03-16 , DOI: 10.1134/s0030400x1912035x Kenan Koç
中文翻译:
MPS封装的CdS量子点与SiO 2 / MPS封装的CdS量子点混合物的薄膜的光学性能比较
更新日期:2020-03-16
Optics and Spectroscopy ( IF 0.8 ) Pub Date : 2020-03-16 , DOI: 10.1134/s0030400x1912035x Kenan Koç
Abstract
The aim of this study is to investigate the optical properties of thin films of MPS-encapsulated CdS quantum dots (QDs) and SiO2/MPS-encapsulated CdS QDs mixture. For this purpose, SiO2 sol and colloidal MPS-encapsulated CdS QDs were mixed and then deposited on a glass substrate by spin coating. Also, the spin coating method was used to deposit the colloid-produced MPS-encapsulated CdS QDs and in this way the QDs were self-assembled onto the glass substrate. The films were heat treated at 150°C under N2 atmosphere. The optical properties of the films were characterized by UV-Vis absorption spectrophotometer and NKD spectrophotometer measurements. The refractive index and thickness of the films were calculated by fitting the measured data in a Drude–Lorentz model. The refractive index values were found 1.90 and 1.51 for the thin films of the MPS-encapsulated CdS QDs and SiO2/QDs mixtures, respectively. According to this result, the refractive index value of the SiO2/CdS QDs mixture thin film is close to the glass substrate and such films may be a good candidate for planar luminous solar concentrators.中文翻译:
MPS封装的CdS量子点与SiO 2 / MPS封装的CdS量子点混合物的薄膜的光学性能比较