通过水热法调控聚（3-己基噻吩）纳米颗粒的光学性质。
Tuning optical properties of poly(3-hexylthiophene) nanoparticles through hydrothermal processing.
作者信息
Lee Seok Ho, Lee Yong Baek, Park Dong Hyuk, Kim Mi Suk, Cho Eun Hei, Joo Jinsoo
机构信息
Department of Physics, Korea University, Seoul 136-713, Korea.
出版信息
Sci Technol Adv Mater. 2011 Mar 15;12(2):025002. doi: 10.1088/1468-6996/12/2/025002. eCollection 2011 Apr.
Poly(3-hexylthiophene) (P3HT) nanoparticles (NPs) were prepared by a reprecipitation method. Hydrothermal processing applied external pressure to the pristine P3HT NPs at temperatures ranging from 60 to 150 °C. Optical absorption and photoluminescence (PL) spectra for the hydrothermally treated P3HT NPs varied markedly with the processing temperature. With increasing treatment temperature, the absorption peak broadened and the peak position shifted from 510 to 623 nm; moreover, the intensity ratio of the 0-1 to 0-0 emission varied. These changes were caused by interactions between the P3HT main chains and alkyl side groups and conformational modifications induced by the high pressure during the hydrothermal process. The evolution of the optical absorption spectra of the P3HT NPs during the hydrothermal processing was strongly correlated with the variation of PL excitation spectra and with the PL emission spectra of a single NP.
通过再沉淀法制备了聚（3-己基噻吩）（P3HT）纳米颗粒（NPs）。水热处理在60至150°C的温度范围内对原始P3HT NPs施加外部压力。水热处理后的P3HT NPs的光吸收和光致发光（PL）光谱随处理温度的变化而显著变化。随着处理温度的升高，吸收峰变宽，峰位置从510 nm移至623 nm；此外，0-1与0-0发射的强度比也发生了变化。这些变化是由水热过程中P3HT主链与烷基侧基之间的相互作用以及高压引起的构象修饰导致的。水热过程中P3HT NPs光吸收光谱的演变与PL激发光谱的变化以及单个NP的PL发射光谱密切相关。
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