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Park, Wug-Dong
- Transactions on Electrical and Electronic Materials
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- v.13 no.4
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- pp.196-199
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- 2012
CdS thin film was prepared on glass substrate by chemical bath deposition in an alkaline solution. The optical properties of CdS thin film were investigated using spectroscopic ellipsometry. The real (${\varepsilon}_1$) and imaginary (${\varepsilon}_2$) parts of the complex dielectric function ${\varepsilon}(E)={\varepsilon}_1(E)+i{\varepsilon}_2(E)$, the refractive index n(E), and the extinction coefficient k(E) of CdS thin film were obtained from spectroscopic ellipsometry. The normal-incidence reflectivity R(E) and absorption coefficient ${\alpha}(E)$ of CdS thin film were obtained using the refractive index and extinction coefficient. The critical points $E_0$ and $E_1$ of CdS thin film were shown in spectra of the dielectric function and optical constants of refractive index, extinction coefficient, normal-incidence reflectivity, and absorption coefficient. The dispersion of refractive index was analyzed by the Wemple-DiDomenico single-oscillator model.
https://doi.org/10.4313/TEEM.2012.13.4.196 인용 PDF KSCI

Pang, Hee-Suk;Han, Chang-Wook;Kim, Ki-Yong;Chung, In-Jae
- 한국정보디스플레이학회:학술대회논문집
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- 2004.08a
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- pp.820-823
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- 2004
We present high reflective anode for top emission OLED. Anode consists of two layers, which are increasing the ability of hole injection and the reflectivity of emitted light. Thin Cr is deposited on AlNd that has a high thermal resistance and reflectivity. The current-voltage characteristics of Cr(30${{\AA}}$)/AlNd(1000${{\AA}}$) anode are poor but these of Cr(50${{\AA}}$)/AlNd(1000${{\AA}}$) anode are superior to these of Cr(30${{\AA}}$)/AlNd(1000${{\AA}}$) and the work function of cr(50${{\AA}}$)/AlNd(1000${{\AA}}$) is higher that of Cr(30${{\AA}}$)/AlNd(1000${{\AA}}$).
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현동훈;조언정;이승준;권용재;김영찬
- Proceedings of the Korean Society for Technology of Plasticity Conference
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- 2003.05a
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- pp.397-401
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- 2003
In this work, diamond turning process is used to produce mirror surface on a Al cone. The Al cone as used as a mirror which can reflect a laser beam without scattering and, hence, it is critical to minimize the surface roughness of a Al cone. During diamond turning, feedrate and tool nose radius are changed to investigate characteristics of the ultra precision machined surface of a Al cone. A laser beam of 633 nm is applied to examine the effect of surface roughness on the characteristics of reflectivity. It is found that surface roughness is not significantly affected by feedrate. The main factor influencing surface roughness is tool nose radius. The line patterns of reflected laser beams show that the minimum surface roughness of 0.08 $\mu\textrm{m}$ (Ra) is required to avoid scattering phenomena of reflectivity.
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Choi, Hoon
- Korean Journal of Logic
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- v.13 no.2
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- pp.1-26
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- 2010
The primary purpose of this paper is to examine critically the theory of critical thinking proposed by the late Professor Young-Jung Kim. He defined the basic properties of critical thinking as active reflectivity, and listed deepness, multilaterality and domain-transitivity as primary properties for which critical thinking aims. He, then, pursued how critical thinking can be merged with creativity and proposed the concept 'critico-creative thinking'. I argue that his theory of critical thinking has some limitation, but we can develop his critico-creative thinking further.
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