本研究是藉由氧電漿在化學氣相沉積法成長的石墨烯表面進行官能化改質,使疏水性的石墨烯表面呈現親水性,隨後透過化學浴沉積法在氧電漿處理石墨烯 (Oxygen plasma treated graphene, OPTG) 的表面成長硫化銻 (Sb2S3) 半導體薄膜,藉此增強石墨烯的光響應,並探討不同的成長時間對石墨烯光響應之影響。研究結果發現,硫化銻成長在 OPTG 表面 (Sb2S3/OPTG) 其吸光波段約為 280~500 nm。實驗結果顯示,經 365 nm 紫外光 (UV) 照光後,在成長 6 小時的 Sb2S3/graphene 複合材料元件有明顯的光反應,其光電流增加 98%,在可見光 420 nm 之光反應可達 350 A/W。證明硫化銻確實可改善石墨烯的光吸收能力,增強石墨烯之光響應。
In this study, the graphene was grown on Cu foil by chemical vapour deposition (CVD) method and functionalized surface modified with oxygen plasma treatment. Graphene was transformed form hydrophobic into hydrophilic by oxygen plasma treatment. We deposited antimony sulfide (Sb2S3) thin films with different growth time on oxygen plasma treatment graphene (OPTG) surface by Chemical bath deposition (CBD) method, and to explore the effects of for photo response of the graphene. The experimental results showed that device of Sb2S3 thin films growth on oxygen plasma treatment graphene (Sb2S3/OPTG) could absorb 280~500 nm wavelength, and observe the obvious current changs under 365 nm UV light irradiation, and the photocurrent enhancement of 95%, the device photo response ~350 A/W at 420 nm Visible light . The study results showed the Sb2S3 can improve the light absorption and enhanced optical response of graphene.