Your browser doesn't support javascript.
loading
Molecular-Additive-Assisted Tellurium Homogenization in ZnSeTe Quantum Dots.
Imran, Muhammad; Paritmongkol, Watcharaphol; Mills, Harrison A; Hassan, Yasser; Zhu, Tong; Wang, Ya-Kun; Liu, Yuan; Wan, Haoyue; Park, So Min; Jung, Euidae; Tam, Jason; Lyu, Quan; Cotella, Giovanni Francesco; Ijaz, Palvasha; Chun, Peter; Hoogland, Sjoerd.
Afiliación
  • Imran M; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
  • Paritmongkol W; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
  • Mills HA; Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada.
  • Hassan Y; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
  • Zhu T; Department of Chemistry and Earth Sciences, College of Arts and Sciences, Qatar University, Doha, 2713, Qatar.
  • Wang YK; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
  • Liu Y; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
  • Wan H; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
  • Park SM; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
  • Jung E; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
  • Tam J; Department of Electrical and Computer Engineering, University of Toronto, 10 King's College Road, Toronto, Ontario, M5S 3G4, Canada.
  • Lyu Q; Department of Materials Science and Engineering, University of Toronto, 184 College Street, Toronto, Ontario, M5S 3E4, Canada.
  • Cotella GF; Huawei Technologies Research & Development (UK) Ltd., 101 Science Park, Milton Road, Cambridge, CB4 0FY, UK.
  • Ijaz P; Huawei Technologies Research and Development (UK) Limited, Phoenix House, B55 Adastral Park, Martlesham Heath, Ipswich, IP5 3RE, UK.
  • Chun P; Department of Nanochemistry, Istituto Italiano di Tecnologia, Via Morego 30, Genoa, 16163, Italy.
  • Hoogland S; Allstate Pkwy, Huawei Technologies, Markham, Ontario, L3R 5A4, Canada.
Adv Mater ; 35(45): e2303528, 2023 Nov.
Article en En | MEDLINE | ID: mdl-37450343
Addition of aqueous hydrohalic acids during the synthesis of colloidal quantum dots (QDs) is widely employed to achieve high-quality QDs. However, this reliance on the use of aqueous solutions is incompatible with oxygen- and water-sensitive precursors such as those used in the synthesis of Te-alloyed ZnSe QDs. Herein, it is shown that this incompatibility leads to phase segregation into Te-rich and Te-poor regions, causing spectral broadening and luminescence peak shifting under high laser irradiation and applied electrical bias. Here, a synthetic strategy to produce anhydrous-HF in situ by using benzenecarbonyl fluoride (BF) as a chemical additive is reported. Through in situ 19 F NMR spectroscopy, it is found that BF reacts with surfactants in tandem, ultimately producing intermediary F···H···trioctylamine adducts. These act as a pseudo-HF source that releases anhydrous HF. The controlled release of HF during nucleation and growth steps homogenizes Te distribution in ZnSeTe lattice, leading to spectrally stable blue-emitting QDs under increasing laser flux from ≈3 µW to ≈12 mW and applied bias from 2.6 to 10 V. Single-dot photoluminescence (PL) spectroscopy and analyses of the absorption, PL and transient absorption spectra together with density functional theory point to the role of anhydrous HF as a Te homogenizer.
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2023 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Adv Mater Asunto de la revista: BIOFISICA / QUIMICA Año: 2023 Tipo del documento: Article País de afiliación: Canadá Pais de publicación: Alemania