TY - JOUR
T1 - Comparative Study of Single and Dual Gain-Narrowed Emission in Thiophene/Furan/Phenylene Co-Oligomer Single Crystals
AU - Shang, Hui
AU - Shimotani, Hidekazu
AU - Ikeda, Susumu
AU - Kanagasekaran, Thangavel
AU - Oniwa, Kazuaki
AU - Jin, Tienan
AU - Asao, Naoki
AU - Yamamoto, Yoshinori
AU - Tamura, Hiroyuki
AU - Abe, Kenta
AU - Kanno, Miyuki
AU - Yoshizawa, Masayuki
AU - Tanigaki, Katsumi
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Number JP24684023 JP25610084, and JP16K13826, JGC-S Scholarship Foundation, and CASIO Science Promotion Foundation.
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/2/2
Y1 - 2017/2/2
N2 - Three organic semiconductors consisting of thiophene, furan, and phenylene groups showed either one or two gain-narrowed emission peaks by excitation with a laser pulse. The two gain-narrowed emission peaks are optically studied and assigned to 0 ↠1 and 0 ↠2 vibronic transitions. The number of gain-narrowed emission peaks is determined by a degree of overlap of the vibronic emissions with ground-state and excited-state absorption of the material. Dependence of the gained emission intensity both on the total input energy and the density of the excited states shows that the two gain-narrowed peaks are attributed to two different decay processes: amplified spontaneous emission (ASE) and superfluorescence (SF). The input energy to be conserved in total is distributed between ASE and SF processes strongly dependent on the transition probability and the self-absorption of organic semiconductors as a gain media.
AB - Three organic semiconductors consisting of thiophene, furan, and phenylene groups showed either one or two gain-narrowed emission peaks by excitation with a laser pulse. The two gain-narrowed emission peaks are optically studied and assigned to 0 ↠1 and 0 ↠2 vibronic transitions. The number of gain-narrowed emission peaks is determined by a degree of overlap of the vibronic emissions with ground-state and excited-state absorption of the material. Dependence of the gained emission intensity both on the total input energy and the density of the excited states shows that the two gain-narrowed peaks are attributed to two different decay processes: amplified spontaneous emission (ASE) and superfluorescence (SF). The input energy to be conserved in total is distributed between ASE and SF processes strongly dependent on the transition probability and the self-absorption of organic semiconductors as a gain media.
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U2 - 10.1021/acs.jpcc.6b10827
DO - 10.1021/acs.jpcc.6b10827
M3 - Article
AN - SCOPUS:85027332790
SN - 1932-7447
VL - 121
SP - 2364
EP - 2368
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 4
ER -