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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >One-step in situ hydrothermal fabrication of D/A poly(3-hexylthiophene)/TiO2 hybrid nanowires and its application in photovoltaic devices
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One-step in situ hydrothermal fabrication of D/A poly(3-hexylthiophene)/TiO2 hybrid nanowires and its application in photovoltaic devices

机译：D / A聚（3-己基噻吩）/ TiO2杂化纳米线的一步法原位水热制备及其在光伏器件中的应用

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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 degrees C in an elevated pressure of similar to 7 bars as compared to the conventional calcination temperature of 450 degrees 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.
机译：在这项研究中，我们开发了一种新颖的原位水热方法来制造自组装的P3HT / TiO2杂化纳米线，其中采用了一种简便的一步合成策略将P3HT分子和钛前体共组织为高度伸长的杂化纳米线，随后高压釜中的水热过程，将钛前体原位转化为P3HT纳米原纤维上的结晶TiO2纳米颗粒。 P3HT纳米原纤被用作结构导向基序，以实现沿纳米原纤压花的直径10-15 nm的电子受体（A）TiO2纳米晶体的良好分散，以及纳米杂化物的有效电子给体（D）。特别地，与在环境压力下的常规煅烧温度450摄氏度相比，在类似于7巴的高压下，通过水热法获得的具有高结晶度的锐钛矿相TiO2纳米颗粒的结晶温度显着降低至130摄氏度。因此，对于TiO 2纳米晶体的合成，允许协同压印两个高度结晶的TiO 2纳米颗粒，所述纳米TiO 2纳米颗粒压印在高度结晶的长程有序P3HT纳米纤维上。由于结构的发展，这种P3HT / TiO2压纹纳米复合物可以显着改善其D / A界面接触面积，以实现有效的电荷分离，而无需封端通常用于非原位D / A共混体系以及电荷传输的有效途径，从而增强了光电性能和器件性能。 P3HT / TiO2压花混合器件的转换效率最高，为0.14％，与非原位P3HT / TiO2混合器件的0.03％相比，这是一个显着的提高。这种新颖的原位方法显示了一种可行的方式来制造具有不同无机纳米粒子的共轭共聚物的有机/无机纳米混合材料，以用于未来的光电器件的应用。

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