Abstract
Steady-state intraband transition, which is a promising electronic transition of a colloidal quantum dot along with the band-gap transition, had been a long-standing challenge. The steady-state intraband transition occurring between discrete electronic states in the conduction band of a colloidal nanocrystal has been reported only from mercury chalcogenide nanocrystals for the past few years. Concerns about the toxicity of the mercury compound necessitate a new nontoxic system exhibiting a steady-state intraband transition. Here we present the steady-state intraband absorption and photoluminescence of Ag2Se colloidal nanocrystals under ambient conditions. The mid-IR intraband transition is carefully investigated by means of FT-IR emission spectroscopy, spectroelectrochemistry, compositional analysis, and transfer characteristics. Especially, the mid-IR intraband photoluminescence of the Ag2Se colloidal nanocrystal will open new avenues in the use of quantum-confined colloidal systems for mid- and long-wavelength infrared light sources along with the band-gap transition that has been investigated for the last three decades.
Original language | English |
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Pages (from-to) | 1907-1911 |
Number of pages | 5 |
Journal | ACS Photonics |
Volume | 5 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2018 May 16 |
Keywords
- infrared-spectroelectrochemistry
- mid-IR intraband photoluminescence
- silver selenide nanocrystals
- thin-film transistor
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Biotechnology
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering