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    Title: Temperature Effect on the Optical Properties of Two Different Triphenylamine-Based Organic Dyes
    Authors: Hsu, Che-hung;Wu, Chi-tai;Yang, Shu-chun;Chang, Yu-Cheng;Huang, Chih-hong;Chang, Shu-mei
    Keywords: Absorption;Photoluminescence (PL);Dye-sensitized solar cells (DSSC);Temperature effect
    Date: 2017-06
    Issue Date: 2016-04-22 13:47:34 (UTC+8)
    Publisher: Springer Netherlands
    Abstract: In this paper, we present the absorption and photoluminescence (PL) spectra of conjugated, metal-free organic dyes, triphenylamine derivatives 3-(4-(bis(4-(5-(4-(hexyloxy)phenyl)thiophenyl)phenyl)amino)phenyl)-2-cyanoacrylic acid (OD3) and (E)-3-(5′-(4-(bis(4-(5-(4-hexyloxy)phenyl)thiophen-2-yl)phenyl)amino)phenyl)-2,2′-bithiophen-5-yl)-2-cyanoacrylic acid (OD3DT), with and without a π-conjugated bridge, respectively, in film at a temperature range from 13 to 400 K. We find that the intensities of absorption and PL of OD3 decrease gradually beyond 200 K, as well as the ratios of integral areas of absorption to PL spectra. However, the other compound, OD3DT, shows a very different behavior. An increase is discovered in the ratio of the absorption to PL integral area when the temperature is higher than 200 K. A π-conjugated bridge gives this compound a higher degree of symmetry, and therefore, a better alignment of the molecules in the film, which causes a stacking aggregation such that the temperature effect on this compound is different than OD3.
    Relation: Research on Chemical Intermediates 43(6), p.3573-3583
    DOI: 10.1007/s11164-016-2431-0
    Appears in Collections:[物理學系暨研究所] 期刊論文

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