Control of the Microstructure and Crystalline Orientation of ZnO Films on a Seed-free Glass Substrate by Using a Spin-Spray Method
Control of the Microstructure and Crystalline Orientation of ZnO Films on a Seed-free Glass Substrate by Using a Spin-Spray Method
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DOI：
10.1021/cg1010693
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发表时间：
2010-10
影响因子：
3.8
通讯作者：
H. Wagata;N. Ohashi;T. Taniguchi;Ken‐ichi Katsumata;K. Okada;N. Matsushita
中科院分区：
文献类型：
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作者：
H. Wagata;N. Ohashi;T. Taniguchi;Ken‐ichi Katsumata;K. Okada;N. Matsushita
采用柠檬酸三钠作为添加剂，采用旋转喷雾法在非晶种基底上制备了具有可控微观结构和晶体取向的 ZnO 薄膜。通过增加溶液中柠檬酸三钠的浓度，使薄膜的微观结构从棒状阵列转变为致密薄膜。这种结构的变化伴随着 XRD 图中 002 峰的减弱。沉积后加热后，ZnO棒阵列的可见光发光减弱，而致密的ZnO薄膜显示出尖锐的紫外发光和微弱的宽可见光发光，从而表明样品的缺陷结构存在差异。我们利用旋转喷雾方法调整了非晶种基底上 ZnO 薄膜的微观结构并分析了其形成机制。
ZnO films on nonseeded substrates with controllable microstructures and crystal orientations were fabricated with a spin-spray method employing trisodium citrate as an additive. The microstructure of the films was made to change from a rod array to a dense film by increasing the trisodium citrate concentration in the solution. This change in structure was accompanied by a weakening of the 002 peak in the XRD pattern. After postdeposition heating, the ZnO rod arrays showed a decrease in visible luminescence, whereas dense ZnO films showed sharp UV luminescence and a weak broad visible luminescence, thus demonstrating a difference in the defect structure of the samples. We tuned the microstructures of ZnO films on nonseeded substrates by using the spin-spray method and analyzed the formation mechanism.