• 제목/요약/키워드: preferential orientation

검색결과 87건 처리시간 0.114초

기판온도에 따른 CdTe박막 특성 (The effect of substrate temperature on the Characteristics of CdTe thin film)

  • 이재형;송우창;박용관
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1995년도 하계학술대회 논문집 C
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    • pp.1178-1180
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    • 1995
  • In this paper, structual, optical and electrical properties of CdTe thin films prepared by electron beam evaporation method were studied. The crystal structure of CdTe films deposited at substrate temperature of $100{\sim}400^{\circ}C$ was zincblend type with preferential orientation of the (111)plane parallel to the substrate. The result of optical absoption and transmittance show that solar radiation with energy larger than band gap is almost completely absorbed within an about $2{\mu}m$ thickness of the evaporated CdTe layer and optical band gap of the CdTe film was larger with increasing substrate temperature. The resistivity of CdTe films deposited on the glass substrate was about $10^5{\sim}10^7{\Omega}cm$.

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Cyclic 증착방법에 의해성장된 다이아몬드 박막의 cathodoluminescence 특성에 관한 연구 (Cathodoluminescence Study of Diamond Films Grown by Cyclic Deposition Method)

  • 서수형;신완철;박진석
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2001년도 추계학술대회 논문집 전기물성,응용부문
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    • pp.12-15
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    • 2001
  • Polycrystalline diamond films are deposited by cyclic method. modulating the $H_2$ Plasma and $CH_4+H_2$ plasma during the growth step. Diamond quality is evaluated by FWHM and $I_D/I_G$ ratio obtained from Raman spectroscopic analysis. Structural defects and impurities generated during the growth step are characterized by cathodoluminescence, and the variations between band-A(430 nm) line and nitrogen-related(578 nm) line are investigated as a function of $T_E/T_G$. Furthermore, the correlations between preferential orientation. film morphologies and CL characteristics are also investigated.

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양극산화된 알루미나 주형 안에 CdS 나노선 배열의 전기화학적 제조 (Electrochemical preparation of CdS nanowire arrays in anodic alumina templates)

  • 윤천호;정영리
    • 한국진공학회지
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    • 제10권1호
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    • pp.57-60
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    • 2001
  • 우리는 술폭시화디메틸에 $_CdCl2$와 S를 포함하는 전해질로부터 양극산화된 알루미나 막의 세공 안으로 반도체를 직접 전착하여 5$\mu\textrm{m}$까지의 길이와 20nm의 작은 직경의 균등한 CdS 나노선 배열을 제조하였다. 나노선 배열은 주사전자현미경법과 X-선회절에 의해 연구되었다. 전착된 물질은 주로 (100) 우선방위를 지닌 육방정계 CdS로 이루어져 있다.

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알루미나 멤브레인을 이용한 CdS nanowire 제작에 관한 연구 (A study on the fabrication of CdS nanowires using by Alumina Membrane)

  • 서문수;이수호;유현민;이재형;최원석;김도영
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2011년도 제42회 하계학술대회
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    • pp.1493-1494
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    • 2011
  • CdS nanostructure materials have been fabricated in porous anodic aluminum oxide (AAO) template by using chemical bath deposition (CBD). These nanostructure materials had uniform diameters of about 15e200 nm, which correspond to the pore sizes of the templates used, and the length was up to 40 mm. X-ray diffraction (XRD) investigation demonstrates that CdS nanostructure materials were hexagonal polycrystalline in nature. As the pore diameter of AAO templates was enlarged, the preferential orientation of c-axis was improved. From PL analysis, the sulfur-deficient defects at the surfaces of CdS nanostructure materials were increasedwhen the samplewas synthesized in the template with larger pore diameter.

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태양전지용 CdS 박막의 제조 조건에 따른 전기적 광학적 특성에 관한 연구 (A Study on the Electrical and Optical Properties of CdS Thin Films Deposited with Different Conditions for Solar Cell Applications)

  • 이재형
    • 한국전기전자재료학회논문지
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    • 제21권7호
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    • pp.620-628
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    • 2008
  • Cadmium sulphide (CdS) thin film, which is used as a window layer of heterojunction solar cell, on the glass substrate was deposited by vacuum evaporation. Effects of deposition conditions such as the source and substrate temperature on electrical and optical properties of CdS films was investigated. As the source temperature was increased, the deposition rate of CdS films was increased. In addition, the optical transmittance and the electrical resistivity of CdS films were decreased as the source temperature was increased. This results were attributed to the increase of excess Cd amount in the film. The crystal structure of CdS films exhibited the hexagonal phase with preferential orientation of the (002) plane. As the substrate temperature was increased, the crystal structure of CdS films was improved and the resistivity of the films was increased due to the decrease of excess Cd in film.

ZnS첨가에 따른 CdZnS박막 특성에 관한 연구 (The effect of ZnS on the Characteristics of CdZnS thin films)

  • 이재형;남준현;송우창;박용관
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1995년도 추계학술대회 논문집
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    • pp.40-43
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    • 1995
  • In this paper, structual, optical and electrical properties of CdZnS thin films prepared by electron beam evaporation method were studied. The crysta1 structure of CdZnS films deposited was hexagonal type with preferential orientation of the (002) plane parallel to the substrate. The results of optical transmittance of the CdZnS film show that absorption edge is shifted to ZnS and optical bandgap was larger wish increasing ZnS content. The resistivity of the CdZnS film is decreasing with increasing ZnS content and mininum for 20 mole%.

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수용액에서의 스피넬형 자성박막의 제작과 그 특성 (The Manufacturing and Properties of Spinel Ferrite Film In Aqueous Solution)

  • 김명호;장경욱;최명규
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1999년도 추계학술대회 논문집 전문대학교육위원 P
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    • pp.4-6
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    • 1999
  • We have performed spin-spray ferrite plating of $Fe_{3-x}Zn_xO_4$($X=0.47{\sim}0.97$) films in the temperature region T=85[$^{\circ}C$]. A reaction solution and an oxidizing solution were supplied to a reaction chamber by supply pumps. The Zn composition X in the $Fe_{3-x}Zn_xO_4$ Film increases as the content of $ZnCl_2$ increase, from X=0.47 at O.05[g/l] to X=0.97 at 0.15[g/l]. All the films are polycrystalline with no preferential orientation, and the magnetization exhibits no definite anisotropy. Grain size in the films increases as X increases, reaching 0.98[${\mu}m$] at X=0.97.

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스핀 스프레이 페라이트 플레이팅법으로 제작한 NixZnyFe3-x-yO4 박막의 결정학적 및 자기적 특성 (Structural and Magnetic Properties of NixZnyFe3-x-yO4 Films Prepared by Spin-Spray Ferrite Plating Method)

  • 김명호;장경욱
    • 전기학회논문지P
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    • 제51권2호
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    • pp.82-86
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    • 2002
  • A series of $Ni_xZn_yFe_{3-x-y}O_4$ films were prepared by spin-spray ferrite plating on glass substrates from aqueous solution at $90[^{\circ}C]$. The magnetic properties in terms of contents of Ni and Zn in the plated films are presented. All the films are polycrystalline with spinel structure. At x+y=0.58, the film presents preferential orientation. As composition of y in the films increases grain size and void in the films increases, while saturation magnetization and coercive force of the films decrease.

Hot Wall법에 의해 제작한 SrS:Ag 박막EL소자의 특성 (Characterization of SrS:Ag Thin Film Electroluminescence Deposited by Hot Wall Technique)

  • 이상태;허성곤;이홍찬
    • 한국마린엔지니어링학회:학술대회논문집
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    • 한국마린엔지니어링학회 2005년도 후기학술대회논문집
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    • pp.242-243
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    • 2005
  • The SrS:Ag, Cl thin films have been grown by the hot wall technique with S furnace placed on the outside of the growth chamber in order to investigate the crystallographic and optical characteristics. The XRD patterns indicate a strongly preferential orientation in the [200] direction. The PL spectrum has an emission peak of about 398nm which is assigned by the transition from $4d^{95}s^1$ to $4d^{10}$ of$Ag^+$ center.

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CdTe와 CdS-CdTe 이종접합 제작과 그 광전특성 (Preparation and Photovoltaic Properties of the CdTe and CdS-CdTe heterojunction)

  • 김성구;박계춘;이진
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1992년도 추계학술대회 논문집
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    • pp.49-54
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    • 1992
  • Devices of ITO/CdS/CdTe/Te/Al were prepared by Electron-Beam deposition under a vacuum of $7{\times}10^{-6}$[torr]. Optical, Electrical, Structural and Photovoltaic properties of thin film CdS/CdTe at substrate. temperature 300~500[$^{\circ}C$] were also investigated, The structure of CdTe films deposited was of the zincblende type a preferential orientation of the (111) plane parallel to the substrate, the CdTe dark resistivity was about $10^6[{\Omega}cm]$. The conversion, efficiency of the cell increased with increasing substrate temperature. The best-fabricated Cell was a conversion efficiency of 9.1[%].

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