期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 121, 期 4, 页码 2364-2368出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.6b10827
关键词
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资金
- JSPS KAKENHI [JP24684023, JP25610084, JP16K13826]
- JGC-S Scholarship Foundation
- CASIO Science Promotion Foundation
- Chinese government
- Tohoku University president scholarship
- Grants-in-Aid for Scientific Research [26105011, 26105001, 17H05326, 15K21719, 16K13826] Funding Source: KAKEN
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 semiconductors as a gain media. transition probability and the self-absorption of organic semiconductors as a gain media.
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