Growth Kinetics and Optical Proprties of CdSe Nanocrystals

Le Anh Thi; Dinh Thanh Binh; Do Hoang Tung; Tran Viet Nhan Hao; Do Quang Tam; Man Minh Tan; Nguyen Minh Hoa

doi:10.51316/jca.2021.106

Authors

Le Anh Thi Institute of Research and Development, Duy Tan University, Da Nang 550000, VIETNAM . Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, VIETNAM Author
Dinh Thanh Binh Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, VIETNAM . Institute of Theoretical and Applied Research, Duy Tan University, Hanoi, 100000, VIETNAM Author
Do Hoang Tung Institute of Physics, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi, VIETNAM Author
Tran Viet Nhan Hao Faculty of Physics, University of Education, Hue University, Hue 530000, VIETNAM Author
Do Quang Tam Faculty of Fundamental Sciences, Hue University of Medicine and Pharmacy, Hue University, Hue 530000, VIETNAM Author
Man Minh Tan Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, VIETNAM | Institute of Theoretical and Applied Research, Duy Tan University, Hanoi, 100000, VIETNAM Author
Nguyen Minh Hoa Faculty of Fundamental Sciences, Hue University of Medicine and Pharmacy, Hue University, Hue 530000, VIETNAM Author

DOI:

https://doi.org/10.51316/jca.2021.106

Keywords:

Nanocrystals, Quantum dots, CdSe, optical properties, growth kinetics

Abstract

We were synthesized CdSe nanocrystals (NC) at a temperature of 260 ^oC and controlling their growth kinetics follows different reaction times from 1 minute to 180 minutes. Base on their optical properties and estimated size to track their growth kinetics follow the Lamer model. Structure and morphology characterized were investigated by XRD pattern and transmission electron microscopy (TEM). All samples show cubic zinc blende type structures. The average NCs size can be calculated by absorption spectra, XRD and TEM, these results lie in close vicinity with each other. The energies of photoluminescence (PL) peaks and band gap of CdSe NCs can be tuned within the regions of 1.99 eV to 2.13 eV and 1.92 eV to 2.12 eV with increasing reaction time. The Stokes shifts and PL emission peaks are narrow, thus confirming the formation of uniformly distributed NCs.

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