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학술저널
저자정보
저널정보
한국전기전자재료학회 전기전자재료학회논문지 전기전자재료학회논문지 제15권 제11호
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2002.1
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A stoichiometric mixture of evaporating materials for CdIn2S4 single crystal thin films was prepared from horizontal furnace. To obtain the single crystal thin films, CdIn2S4 mixed crystal was deposited on thoroughly etched semi-insulating GaAs(100) substrate by hot wall epitaxy(HWE) system. The source and substrate temperatures were 630 ℃ and 420 ℃, respectively. The crystalline structure of single crystal thin films was investigated by the photoluminescence and double crystal X-ray diffraction(DCXD). The carrier density and mobility of CdIn2S4 single crystal thin films measured from Hall effect by van der Pauw method are 9.01×1016 cm-3 and 219 cm2/V․s at 293 K, respectively. From the optical absorption measurement, the temperature dependence of energy band gap on CdIn2S4 single crystal thin films was found to be Eg(T) = 2.7116 eV - (7.74 × 10-4 eV) T2/(T+434). After the as-grown CdIn2S4 single crystal thin films was annealed in Cd-, S-, and In-atmospheres, the origin of point defects of CdIn2S4 single crystal thin films has been investigated by the photoluminescence(PL) at 10 K. The native defects of VCd, VS, Cdint, and Sint obtained by PL measurements were classified as a donors or acceptors type. And we concluded that the heat-treatment in the S-atmosphere converted CdIn2S4 single crystal thin films to an optical p-type. Also, we confirmed that In in CdIn2S4/GaAs did not form the native defects because In in CdIn2S4 single crystal thin films existed in the form of stable bonds.

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