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首页> 外文期刊>Colloids and Surfaces, A. Physicochemical and Engineering Aspects >A BICHROMOPHORIC ORGANIC-INORGANIC SEMICONDUCTOR NANOCOMPOSITE: DEVICE READY BROAD SPECTRAL RESPONSE LIGHT-HARVESTING MATERIAL WITH ENHANCED PHOTORESPONSE
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A BICHROMOPHORIC ORGANIC-INORGANIC SEMICONDUCTOR NANOCOMPOSITE: DEVICE READY BROAD SPECTRAL RESPONSE LIGHT-HARVESTING MATERIAL WITH ENHANCED PHOTORESPONSE

机译：一种漂亮的有机无机半导体纳米复合材料：具有增强光响应的装置现出的宽谱响应光收集材料

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Herein, an improved light harvesting organic-inorganic nanocomposite material was obtained by coupling a judiciously developed green-orange absorbing bichromophoric organic salt [R6 G][HFl] and UV-blue absorbing TiO2 QDs. The designed bichromophoric salt is synthesized using a biphasic metathesis reaction and the nanocomposite [R6 G][HFl]-TiO2 is then obtained by single phase overnight stirring of the two components in an optimized ratio. The synthesized nanocomposite results in further broadening of absorption spectrum ranging from UV to NIR with the peak approximately matching the solar irradiation spectrum and demonstrate enhanced absorptivity thereby capable of harvesting the major part of the solar emission. The nanocomposite demonstrates a perfect molecular as well as HOMO-LUMO and valence band-conduction band alignment which enables energy transfer from TiO2 to [R6 G][HFl] and charge transfer between duo as evident from steady state and transient photoluminescence studies. White light irradiation of the nanocomposite film exhibits 450 times higher photocurrent than that of the bare TiO2 film. The slow photocurrent decay time of 46 s confirms that a generous amount of photo generated carriers harvest in the composite sample. This unique nanocomposite structure demonstrating spectral broadening along with charge transfer result in extraordinarily improved photocurrent and photoresponse thereby rendering [R6 G][HFl]-TiO2 nanocomposite an excellent potential active material for a solid state TiO2 based Heterojunction Solar Cell (HJSC). Efficiency of this nanocomposite based HJSC was found to be the highest (4.4 %) among the various other layer by layer structured devices thereby presenting a simplified cell fabrication technique by excluding the necessity of usual layer by layer dye deposition on TiO2 followed by their optimization for best efficiency. Thus, this study presents a thoughtfully designed device ready perfect active material for a TiO2 based HJSC exhibiting good competence.
机译：这里，通过联接明智地开发的绿色橙色吸收嗜铬有机盐[R6 g] [HFl]和紫外线吸收TiO 2 QD，得到一种改进的有机无机纳米复合材料。使用双相复分解反应合成设计的漂白盐，然后通过单相过夜以优化的比例通过单相过夜搅拌来获得纳米复合材料[R6g] -tiO 2。合成的纳米复合材料导致从UV到NIR的吸收光谱的进一步扩展，峰值大致匹配太阳照射光谱并表现出增强的吸收性，从而能够收集太阳发射的主要部分。纳米复合材料显示出完美的分子以及同性恋和价带导带对准，其使得从TiO2到[R6 G] [HFL]的能量转移，与稳态和瞬态光致发光研究中的二重奏之间的电荷转移。纳米复合膜的白光照射表现出比光电流高出450倍的光电流比裸TiO2膜的光电。 46秒的缓慢光电流衰减时间确认，在复合样品中收获了大量的照片产生的载体。这种独特的纳米复合材料结构明显与电荷转移的光谱展宽导致非常改善的光电流和光响应，从而使[R6 g] [HFL] -tiO2纳米复合材料是用于固态TiO2的异质结太阳能电池（HJSC）的优异潜在的活性材料。发现该纳米复合材料的HJSC的效率是通过层结构装置的各种其他层中的最高（4.4％），从而通过在TiO 2上除去通常层的必要性来呈现简化的细胞制造技术，然后进行优化最佳效率。因此，本研究介绍了一个奇迹设计的设备准备好的活性材料，用于基于TiO2的HJSC表现出良好的能力。

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