Abstract We report a new direct fabrication of the ZnO nanorods (NR) by hydrothermal method, in which the preparation of seed layer is eliminated. We show that the tuning of initial temperature rate during the hydrothermal process plays a key role in the structural modification of the ZnO NR. A highly oriented ZnO NR is successfully fabricated by using a low rate of initial temperature. The increase of optical absorption and electron transport was obtained by reducing the diameter and increasing distribution of the ZnO NR on the substrate. Interestingly, an additional absorption from the defects is obtained in the system, which plays an important role in expanding the optical absorption. Our system will provide a favourable characteristic for developing the high-performance optoelectronic devices with high optical absorption and high electron transport.

中文翻译：

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水热法直接形成氧化锌纳米棒：研究其光学性质和电子传输

摘要 我们报道了一种通过水热法直接制备 ZnO 纳米棒 (NR) 的新方法，其中消除了种子层的制备。我们表明，水热过程中初始温度速率的调整在 ZnO NR 的结构改性中起着关键作用。通过使用低初始温度速率成功制造了高度取向的 ZnO NR。通过减小基板上 ZnO NR 的直径和增加其分布来增加光吸收和电子传输。有趣的是，在系统中获得了来自缺陷的额外吸收，这在扩大光吸收方面起着重要作用。