Ultrasound-modulated microstructure of PbS film in ammonia-free chemical bath deposition
Ultrasound-modulated microstructure of PbS film in ammonia-free chemical bath deposition
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DOI：
10.1039/c4ra13921f
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发表时间：
2015-01
期刊：
影响因子：
3.9
通讯作者：
Libo Fan;Peng Wang;Qiuquan Guo;Hongpei Han;Ming Li;Z. Chen;Haifeng Zhao;Dongxing Zhang;Zhi Zheng;Jun Yang
中科院分区：
文献类型：
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作者：
Libo Fan;Peng Wang;Qiuquan Guo;Hongpei Han;Ming Li;Z. Chen;Haifeng Zhao;Dongxing Zhang;Zhi Zheng;Jun Yang
在这项工作中，超声波被用作解决大尺寸基底上的不均匀成核和调节薄膜微观结构以提高性能的有效方法。硫化铅（PbS）作为最重要的IV-VI族半导体之一，在超声波辅助下通过无氨化学浴沉积（CBD）制备了大尺寸均匀薄膜。研究了PbS薄膜的晶体结构、化学计量、表面形貌、截面结构、厚度、粗糙度和光学性能等特性，以揭示超声波的调制效应。此外，还讨论了PbS薄膜的生长机理。更重要的是，超声辅助无氨CBD制备的PbS薄膜提供了更好的光电化学（PEC）性能和强烈的光敏性。
In this work, ultrasound was used as an efficient way to solve the non-uniform nucleation over large-scale substrate and to modulate film microstructure for performance improvement. Lead sulfide (PbS), as one of the most important IV–VI group semiconductors, was employed to prepare large-scale uniform films with the assistance of ultrasound in ammonia-free chemical bath deposition (CBD). The characteristics of PbS films, including crystalline structure, stoichiometry, surface morphology, cross-section structure, thickness, roughness and optical property were studied to reveal the modulating effect of ultrasound. In addition, the growth mechanism of PbS films was discussed. More importantly, PbS films prepared by ultrasound-assisted ammonia-free CBD provided better photoelectrochemical (PEC) performance with intense photosensitivity.