Photoelectrochemical kinetics of Eosin Y-sensitized zinc oxide films investigated by scanning electrochemical microscopy under illumination with different LED

2009 ◽  
Vol 55 (2) ◽  
pp. 458-464 ◽  
Author(s):  
Yan Shen ◽  
Ushula Mengesha Tefashe ◽  
Kazuteru Nonomura ◽  
Thomas Loewenstein ◽  
Derck Schlettwein ◽  
...  
2006 ◽  
Vol 12 (22) ◽  
pp. 5832-5839 ◽  
Author(s):  
Yan Shen ◽  
Kazuteru Nonomura ◽  
Derck Schlettwein ◽  
Chuan Zhao ◽  
Gunther Wittstock

2009 ◽  
Vol 24 (9) ◽  
pp. 095019 ◽  
Author(s):  
Changgang Huang ◽  
Meili Wang ◽  
Quanlin Liu ◽  
Yongge Cao ◽  
Zhonghua Deng ◽  
...  

Author(s):  
T. A. Emma ◽  
M. P. Singh

Optical quality zinc oxide films have been characterized using reflection electron diffraction (RED), replication electron microscopy (REM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Significant microstructural differences were observed between rf sputtered films and planar magnetron rf sputtered films. Piezoelectric materials have been attractive for applications to integrated optics since they provide an active medium for signal processing. Among the desirable physical characteristics of sputtered ZnO films used for this and related applications are a highly preferred crystallographic texture and relatively smooth surfaces. It has been found that these characteristics are very sensitive to the type and condition of the substrate and to the several sputtering parameters: target, rf power, gas composition and substrate temperature.


2009 ◽  
Vol 129 (11) ◽  
pp. 1981-1984
Author(s):  
Yuki Ueno ◽  
Takanori Aoki ◽  
Akio Suzuki ◽  
Tatsuhiko Matsushita ◽  
Masahiro Okuda

2014 ◽  
Vol 602-603 ◽  
pp. 871-875
Author(s):  
Yen Pei Fu ◽  
Jian Jhih Chen

In this study, ZnO films, prepared by Chemical Bath Deposition (CBD), are applied as the conductive layers for thin film solar cells. Zinc acetate is used as a source of zinc, and different proportions of ammonia solution are added and well mixed. The growth of zinc oxide films in reaction solutions is taken place at 80°C and then heated to 500°C for one hour. In this study, the different ammonia concentrations and deposition times is controlled. The thin film structure is Hexagonal structure, which is determined by X-ray diffraction spectrometer (XRD) analysis. Scanning electron microscopy (SEM) is used as the observation of surface morphology, the bottom of the film is the interface where the heterogeneous nucleation happens. With the increase of deposition time, there were a few attached zinc oxide particles, which is formed by homogeneous nucleation. According to UV / visible light (UV / Vis) absorption spectrometer transmittance measurements and the relationship between/among the incident wavelength, it can be converted to the energy gaps (Eg), which are about 3.0 to 3.2eV, by using fluorescence spectroscopy analysis. The emission of zinc oxide films has two wavelengths which are located on 510nm and 570nm. According to Based on the all analytic results, the ammonia concentration at 0.05M, and the deposition time is 120 minutes, would obtain the conditions of ZnO films which is more suitable for applications of conductive layer material in thin film solar cell.


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