Structural and Optical Properties of CdSe/CdTe Core-Shell Quantum Dots-Reference-Cited by-同舟云学术

Structural and Optical Properties of CdSe/CdTe Core-Shell Quantum Dots

Published:2022-01-22 Issue: Volume:2022 Page:1-7
ISSN:1687-4129
Container-title:Journal of Nanomaterials
language:en
Short-container-title:Journal of Nanomaterials

Author:

Ramalingam G.¹^ORCID,Ragupathi C.²,Rangasamy Baskaran³^ORCID,Colak I.⁴^ORCID,Vetrivelan V.⁵^ORCID,Poudineh Neda⁶^ORCID,Ravindran Balasubramani⁷^ORCID,Chang Soon Woong⁷,Gengan Robert M.⁸^ORCID

Affiliation:

1. Department of Nanoscience and Technology, Science Campus, Alagappa University, Karaikudi, 630003 Tamil Nadu, India

2. Department of Chemistry, Sriram College of Arts and Science, Perumalpattu, Tiruvallur, 602024, Tamilnadu, India

3. Energy Storage Materials and Devices Lab, Department of Physics, School of Mathematics and Natural Sciences, The Copperbelt University, PO Box 21692, Riverside, Kitwe, Zambia

4. Department of Electrical and Electronics Engineering, Nisantasi University, Istanbul, Turkey

5. Department of Physics, Thanthai Periyar Government Institute of Technology, Vellore, 632002, Tamilnadu, India

6. Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea

7. Department of Environmental Energy and Engineering, Kyonggi University, Yeongtong-Gu, Suwon, Gyeonggi-Do 16227, Republic of Korea

8. Department of Chemistry, Faculty of Applied Sciences, Durban University of Technology, Durban 4001, South Africa

Abstract

A simple hydrothermal method is developed for the synthesis of high-quality type II core-shell CdSe/CdTe quantum dots (QDs). The XRD results reveal the formation of mixed phases of CdSe and CdTe with a grain size of 12.6 nm. SEM morphology confirms the uniformly distributed nanoscale CdSe/CdTe with no agglomeration. EDX confirms the elemental presence of Cd, Se, and Te in the compound. TEM results suggest that the size of spherical CdSe/CdTe core-shell QDs is in the range of 8~10 nm. Significant results of the SAED pattern confirm the core and shell components as CdSe and CdTe, respectively. The correlation between the synthesis procedures and the corresponding structures of the core-shell CdSe/CdTe QDs is discussed. The demonstrated monodispersed lattice structure of core-shell CdSe/CdTe QDs has excellent PL emission properties at

λ_{emi} ~ 585 nm

which is suitable for photovoltaic applications. The UV-Vis absorption bands at 455 nm and 560 nm confirm exciton emission due to the type II matrix of CdSe/CdTe QDs.