Khurshid Farheen, Jeyavelan M, Sterlin Leo Hudson M, Nagarajan Samuthira
Department of Chemistry, Central University of Tamil Nadu Thiruvarur India
Department of Physics, Central University of Tamil Nadu Thiruvarur India
RSC Adv. 2018 Oct 22;8(63):35959-35965. doi: 10.1039/c8ra06546b.
An intimate physical mixture of graphene oxide (GO) and semiconducting organic molecules like bromophenathrene (BrPh) and bromopyrene (BrPy) was prepared by using a ball milling technique. The structural, microstructural, physical and chemical properties of the mixtures (20 wt% of GO) were analyzed by X-ray diffraction, SEM, FT-IR, TGA and TCSPC studies. Furthermore, the electrochemical properties like AC electrical conductivity, transient photocurrent response (PCTR) and open circuit voltage (OCVD) of the samples were analyzed. It has been observed from TCSPC and OCVD measurements that 20 wt% of GO in the semiconductor composite leads to an enhanced life-time of photo-generated charge carriers. The physical mixture composites exhibit a higher photocurrent than pure BrPh and BrPy.
采用球磨技术制备了氧化石墨烯（GO）与溴菲（BrPh）和溴芘（BrPy）等半导体有机分子的紧密物理混合物。通过X射线衍射、扫描电子显微镜、傅里叶变换红外光谱、热重分析和时间相关单光子计数研究对混合物（20 wt%的GO）的结构、微观结构、物理和化学性质进行了分析。此外，还分析了样品的交流电导率、瞬态光电流响应（PCTR）和开路电压（OCVD）等电化学性质。从时间相关单光子计数和开路电压测量中观察到，半导体复合材料中20 wt%的GO会导致光生电荷载流子寿命延长。物理混合物复合材料表现出比纯BrPh和BrPy更高的光电流。
