TY - JOUR
T1 - Mid-Infrared Intraband Transition of Metal Excess Colloidal Ag2Se Nanocrystals
AU - Park, Mihyeon
AU - Choi, Dongsun
AU - Choi, Yoonchang
AU - Shin, Hang Beum
AU - Jeong, Kwang Seob
N1 - Funding Information:
This work is supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, & Future Planning (NRF-2016R1C1B2013416), Ministry of Education (NRF-20100020209). The authors gratefully acknowledge use of the facilities of the Korea Basic Science Institute (KBSI).
Funding Information:
This work is supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT, & Future Planning (NRF-2016R1C1B2013416) Ministry of Education (NRF-20100020209). The authors gratefully acknowledge use of the facilities of the Korea Basic Science Institute (KBSI).
PY - 2018/5/16
Y1 - 2018/5/16
N2 - 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.
AB - 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.
KW - infrared-spectroelectrochemistry
KW - mid-IR intraband photoluminescence
KW - silver selenide nanocrystals
KW - thin-film transistor
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U2 - 10.1021/acsphotonics.8b00291
DO - 10.1021/acsphotonics.8b00291
M3 - Article
AN - SCOPUS:85047185404
VL - 5
SP - 1907
EP - 1911
JO - ACS Photonics
JF - ACS Photonics
SN - 2330-4022
IS - 5
ER -