Journal article
Colloidal Germanium Quantum Dots with Broadly Tunable Size and Light Emission
Journal of the American Chemical Society, Vol.147(2), pp.1792-1802
15 Jan 2025
PMID: 39750178
Abstract
Germanium (Ge) colloidal quantum dots (CQDs) were synthesized by thermal decomposition of GeI
using capping ligand mixtures of oleylamine (OAm), octadecene (ODE), and trioctylphosphine (TOP). Average diameters could be tuned across a wide range, from 3 to 18 nm, by adjusting reactant concentrations, heating rates, and reaction temperatures. OAm promotes decomposition of GeI
to Ge and serves as a weakly bound capping ligand. ODE displaces OAm during the reaction to terminate particle growth and prevent surface oxidation. TOP is necessary for obtaining nanocrystals larger than 11 nm. The Ge CQDs have relatively narrow size distributions and exhibit size-dependent, band-edge photoluminescence (PL), with peak energies from 0.8 to 1.34 eV, across a wide spectral range in the infrared (IR).
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Details
- Title
- Colloidal Germanium Quantum Dots with Broadly Tunable Size and Light Emission
- Creators
- Jungchul Noh - The University of Texas at AustinHyun Gyung Kim - The University of Texas at AustinDaniel W Houck - The University of Texas at AustinTushti Shah - The University of Texas at AustinYangning Zhang - The University of Texas at AustinAlexandra Brumberg - Northwestern UniversityRichard D Schaller - Northwestern UniversityBrian A Korgel - The University of Texas at Austin
- Publication Details
- Journal of the American Chemical Society, Vol.147(2), pp.1792-1802
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemistry
- Web of Science ID
- WOS:001389991000001
- Scopus ID
- 2-s2.0-85215267488
- Other Identifier
- 991022053868504721