Fluorescence and amplified emission properties of single-crystal 2,5-bis(4-biphenylyl)thiophene |
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Authors: | Yasuyuki Ono Fumio Sasaki Hisao Yanagi |
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Institution: | 1. Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), Ikoma, Nara (Japan);2. Electronics and Photonics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki (Japan) |
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Abstract: | Ligth amplification properties are investigated for single crystals of commercially available 2,5-bis(4-biphenylyl)thiophene. Depending on growth methods, three kinds of crystals are obtained having different fluorescence spectra in blue-green color. Under optical pumping, their amplified spontaneous emission (ASE) bands appear at different wavelengths. The solution-grown crystal shows ASE bands at λ = 464 and 494 nm which are assigned to the 0–1 and 0–2 transitions, respectively. By contrast, the vapor- and slide-boat-grown crystals show a red-shifted 0–1 band at λ = 496 and a 0–2 band at 520 nm, respectively. |
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Keywords: | 2 5-bis(4-biphenylyl)thiophene single crystal fluorescence amplified spontaneous emission organic laser |
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