https://scholars.lib.ntu.edu.tw/handle/123456789/444692
標題: | One-step in situ hydrothermal fabrication of D/A poly(3-hexylthiophene)/TiO<inf>2</inf> hybrid nanowires and its application in photovoltaic devices | 作者: | Chiang, C.-J. Lee, Y.-H. Lee, Y.-P. Lin, G.-T. Yang, M.-H. LEE-YIH WANG CHIH-CHEN HSIEH CHI-AN DAI |
公開日期: | 2016 | 卷: | 4 | 期: | 3 | 起(迄)頁: | 908-919 | 來源出版物: | Journal of Materials Chemistry A | 摘要: | In this study, we developed a novel in situ hydrothermal method to fabricate self-assembled P3HT/TiO2 hybrid nanowires, wherein a facile one-step synthetic strategy was utilized to co-organize P3HT molecules and titanium precursors into highly elongated hybrid nanowires, followed by a hydrothermal process in an autoclave to in situ transform the titanium precursors into crystalline TiO2 nanoparticles on the P3HT nanofibrils. P3HT nanofibrils were utilized as a structure-directing motif to achieve a favorable dispersion of electron acceptor (A) TiO2 nanocrystals of 10-15 nm in diameter embossed along the nanofibrils, as well as an efficient electron donor (D) for the nanohybrid. In particular, the crystallization temperature of anatase-phase TiO2 nanoparticles with high crystallinity obtained via the hydrothermal method was significantly reduced to 130 °C in an elevated pressure of ∼7 bars as compared to the conventional calcination temperature of 450 °C at ambient pressure for TiO2 nanocrystal synthesis, therefore, allowing the synergistic one-step fabrication of both highly crystalline TiO2 nanoparticles embossed on highly crystalline long-range ordered P3HT nanofibrils. As a consequence of the structural development, this P3HT/TiO2 embossed nanohybrid could afford significant improvements in its D/A interfacial contact area for effective charge separation without the need for capping ligands typically used in ex situ D/A blend systems, as well as an efficient pathway for charge transport, leading to enhanced optoelectronic properties and device performance. The highest conversion efficiency of 0.14% was presented by the P3HT/TiO2 embossed hybrid device, which was a remarkable improvement as compared to only 0.03% from an ex situ P3HT/TiO2 hybrid device. This novel in situ approach shows a feasible way to fabricate organic/inorganic nanohybrid materials of conjugated copolymers with different inorganic nanoparticles for the applications of future optoelectronic devices. © 2016 The Royal Society of Chemistry. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/444692 | DOI: | 10.1039/c5ta06461a | SDG/關鍵字: | Crystalline materials; Hydrothermal synthesis; Nanocrystals; Nanofibers; Nanoparticles; Nanostructured materials; Nanowires; Optoelectronic devices; Titanium; Titanium dioxide; Calcination temperature; Crystallization temperature; Hydrothermal fabrications; Optoelectronic properties; Organic/inorganic nanohybrid; Poly (3-hexylthiophene); Situ hydrothermal methods; Structural development; Synthesis (chemical) |
顯示於: | 化學工程學系 |
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