Amplified Pulse Emissions with Variable Delay Times in Vibronic Transition Bands of Thiophene/Phenylene Co-Oligomer Single Crystals
Authors:
- Naoki MatsuokaNMNaoki Matsuoka
- Toru HiramatsuTHToru Hiramatsu
- Hisao YanagiHYHisao Yanagi
- Fumio SasakiFSFumio Sasaki
- Shu HottaSHShu Hotta
- 1 May 2010
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 49 (5R)
Abstract
Time-resolved photoluminescence of thiophene/phenylene co-oligomer (TPCO) single crystals has been measured at 7 K. The amplified pulse emissions with time delay are demonstrated in the 0–2 vibronic transition band of the TPCO single crystal under high-intensity excitation. We identify the delayed pulse emission to the 2A 1 vibration line. The pulse peak of the 2A 1 line exhibits a maximum delay time of 70 ps at 7 K. We consider that the amplified pulse emissions with time delay in single crystals occur at a vibronic transition band with the largest spontaneous emission intensity in the PL spectrum under weak excitation.Keywords
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