期刊
ACS PHOTONICS
卷 5, 期 5, 页码 1907-1911出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.8b00291
关键词
silver selenide nanocrystals; mid-IR intraband photoluminescence; infrared-spectroelectrochemistry; thin-film transistor
类别
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT, & Future Planning [NRF-2016R1C1B2013416]
- Ministry of Education [NRF-20100020209]
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.
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