Lv Xin, Huang Yi, Liu Zhibo, Tian Jianguo, Wang Yan, Ma Yanfeng, Liang Jiajie, Fu Shipeng, Wan Xiangjian, Chen Yongsheng
Center for Nanoscale Science and Technology, Institute of Polymer Chemistry, Nankai University Tianjin, China.
Small. 2009 Jul;5(14):1682-7. doi: 10.1002/smll.200900044.
Time-resolved photoconductivity measurements are carried out on graphene films prepared by using soluble graphene oxide. High photocurrent generation efficiency is observed for these graphene-based films, and the relationships between their photoconductivity and different preparation methods, incident light intensity, external electric field, and photon energies are investigated. Higher photoconductivity is observed with higher photon energy at same incident light intensity. By fitting the experimental data to the Onsager model, the primary quantum yields for charge separation to generate bound electron-hole pairs and the initial ion-pair thermalization separation distance are calculated.
对使用可溶性氧化石墨烯制备的石墨烯薄膜进行了时间分辨光电导率测量。观察到这些基于石墨烯的薄膜具有高光电流产生效率，并研究了它们的光电导率与不同制备方法、入射光强度、外部电场和光子能量之间的关系。在相同入射光强度下，光子能量越高，观察到的光电导率越高。通过将实验数据拟合到昂萨格模型，计算了电荷分离产生束缚电子 - 空穴对的初级量子产率和初始离子对热化分离距离。
