skip to main content

SciTech ConnectSciTech Connect

Title: Emission switching in carbon dots coated CdTe quantum dots driving by pH dependent hetero-interactions

Due to the different emission mechanism between fluorescent carbon dots and semiconductor quantum dots (QDs), it is of interest to explore the potential emission in hetero-structured carbon dots/semiconducting QDs. Herein, we design carbon dots coated CdTe QDs (CDQDs) and investigate their inherent emission. We demonstrate switchable emission for the hetero-interactions of the CDQDs. Optical analyses indicate electron transfer between the carbon dots and the CdTe QDs. A heterojunction electron process is proposed as the driving mechanism based on N atom protonation of the carbon dots. This work advances our understanding of the interaction mechanism of the heterostructured CDQDs and benefits the future development of optoelectronic nanodevices with new functionalities.
Authors:
; ; ; ; ; ; ;  [1] ;  [2] ; ;  [3] ;  [4]
  1. College of Physics, Optoelectronics and Energy and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006 (China)
  2. School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049 (China)
  3. State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054 (China)
  4. Department of Chemical and Materials Engineering, New Mexico State University, Las Cruces, New Mexico 88003 (United States)
Publication Date:
OSTI Identifier:
22486099
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 107; Journal Issue: 20; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMS; CADMIUM TELLURIDES; CARBON; ELECTRON TRANSFER; FLUORESCENCE; HETEROJUNCTIONS; PH VALUE; POTENTIALS; QUANTUM DOTS; SEMICONDUCTOR MATERIALS