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Vol.53, No.6, 432 ~ 438, 2015
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| Title |
| Effects of Post Heat Treatments on ZnO Thin-Films Grown on Zn-coated Teflon Substrates |
| 김익현 Ik Hyun Kim , 남기웅 Gi Woong Nam , 이철언 Cheol Eon Lee , 김동완 Dong Whan Kim , 최현광 Hyon Kwang Choi , 김양수 Yang Soo Kim , 김진수 Jin Soo Kim , 김종수 Jong Su Kim , 손정식 Jeong-sik Son , 임재영 Jae-young Leem |
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| Abstract |
| ZnO thin films were first grown on Zn-coated Teflon substrates using a spin-coating method, with various post-heating temperatures. The structural and optical properties of the ZnO thin films were then investigated using field-effect scanning-electron microscopy, X-ray diffractometry, and photoluminescence (PL) spectroscopy. The surface morphology of these ZnO thin films exhibited dendritic structures. With increasing post-heating temperature, all samples preferentially exhibited preferential c-axis orientation and increased residual tensile stress. All of the films exhibited preferential c-axis orientation, and the residual tensile stress of those increased with increasing post-heating temperature. The near-band-edge emission (NBE) peaks were red-shifted after post-heating treatment at 400 ℃. The intensity of the deep-level emission (DLE) peaks gradually decreased with increasing post- heating temperature. Moreover, the narrowest ‘full width at half maximum’ (FWHM) and the highest intensity ratio of the NBE to the DLE for thin films, were observed after post-heating at 400 ℃. The ZnO thin films fabricated with the 400 ℃ post-heating process provided the highest crystallinity and optical properties.(Received March 04, 2014) |
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| Key Words |
| zinc oxide, teflon substrate, zn coating layer, spin coating, photoluminescence |
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