スプリットターゲットを用いるパルスレーザー堆積法により作製したＧａ２Ｏ３‐Ｉｎ２Ｏ３系透明導電膜

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タイトル別名
  • Transparent Conducting Ga2O3-In2O3 Thin Films Prepared by Pulsed Laser Deposition Using Split Targets.
  • スプリットターゲット オ モチイル パルスレーザー タイセキホウ ニ ヨリ サクセイ シタ Ga2O3-In2O3ケイ トウメイ ドウデン マク

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抄録

The split target composed of Ga2O3 and In2O3 was used to deposit transparent conducting Ga-In oxide thin films on glass substrate by a pulsed laser deposition technique using an ArF laser (λ=193 nm). In all experiments, a repetition rate of 1-20 Hz, an energy density of 0.4-2 J/cm2, and irradiation time of 20-300 min were used. An optical transmittance of more than 80% in the wavelength region of 380-2700 nm and the lowest resisitivity of 6.96 × 10-4 Ω · cm, attributing to a high Hall mobility of 52.4 cm2/V · s and a low carrier concentration of 1.71 × 1020 cm-3 were obtained for the 100-150 nm thick Ga-In oxide film with 23.3 wt% Ga content grown in oxygen at substrate temperature of 350°C. The optical energy gap was estimated to be 4.0 eV (310 nm) by plotting the relationship of the direct transition type. The surface morphology packed densely with the ellipsoidal crystallites of axis length of 100-150 nm equal to film thickness was observed by high-resolution SEM.

収録刊行物

  • 真空

    真空 42 (3), 325-328, 1999

    一般社団法人 日本真空学会

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