Controlled growth of hematite (α-Fe2O3) nanorod array on fluorine doped tin oxide: Synthesis and photoelectrochemical properties
Controlled growth of hematite (α-Fe2O3) nanorod array on fluorine doped tin oxide: Synthesis and photoelectrochemical properties
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DOI：
10.1016/j.elecom.2011.06.008
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发表时间：
2011-09-01
影响因子：
5.4
通讯作者：
Mhaisalkar, S. G.
中科院分区：
文献类型：
--
作者：
Mulmudi, H. K.;Mathews, N.;Mhaisalkar, S. G.
以尿素为pH调节剂，采用水热法在掺氟氧化锡（FTO）衬底上生长了赤铁矿纳米棒。纳米棒的XRD显示在500摄氏度退火30分钟后的纯赤铁矿相，在[110]方向上具有优先取向。电化学阻抗谱进行了研究的电气性能。使用Mott-Schottky分析，在赤铁矿纳米棒阵列中的电荷载流子密度估计为5.62 × 10（19）cm（-3）。在纳米结构中，n型赤铁矿纳米棒阵列在两电极光电化学电池中研究的样品中显示出最好的转换效率。光电流测量与光强度进行调查的设备性能和性能的限制因素归因于少数电荷载流子的短扩散长度。(C)2011 Elsevier B. V.保留所有权利。
Hematite nanorods were grown on fluorine doped tin oxide (FTO) substrates by hydrothermal means utilizing urea as a pH regulating agent. XRD for nanorods revealed pure hematite phase after annealing at 500 degrees C for 30 min with preferential orientation in the [110] direction. Electrochemical impedance spectroscopy was carried out to investigate the electrical properties. Using Mott-Schottky analysis, charge carrier density was estimated to be 5.62 x 10(19) cm(-3) in the hematite nanorod array. Among the nanostructures, the n-type hematite nanorod array showed the best conversion efficiency among the samples studied in a two electrode photoelectrochemical cell. Photocurrent measurements versus light intensity were performed to investigate the device performance and the limiting factors to the performance were attributed to the short diffusion length of minority charge carriers. (C) 2011 Elsevier B.V. All rights reserved.