Title：Properties of DSSCs with graphene electron transport layer prepared by different methods（由不同方法制备石墨烯电子传输层的染料敏化太阳能电池特性）
报告人：Lung-Chien Chen（陈隆建）教授（台北科技大学光电工程系，台湾）
时   间：2015年5月6日（周三）上午10:00；
地   点：中心教学楼610
ABSTRACT
This work reports the extent to which the graphene sandwich structure prepared by different methods improves the performance of dye-sensitized solar cells (DSSCs). The film demonstrates a stack of graphene flakes and have superior characteristics of Raman spectra. The DSSCs with the TiO2/graphene/TiO2 sandwich structure are also studied. This study has demonstrated that the graphene sandwich structure prepared by sputtering effectively enhances the open circuit voltage; short-circuit current density, and photoelectrical conversion efficiency of DSSCs. The enhanced performance of DSSCs with the sandwich structure can be attributed to an increase in electron transport efficiency and in the absorption of light in the visible range. The DSSC with the graphene sandwich structure prepared by sputtering exhibited a Voc of 0.6 V, a high Jsc of 11.22 mA/cm-2, a fill factor (FF) of 0.58, and a calculated η of 3.93 %, which is 60% higher than that of a DSSC with the graphene structure prepared by electroplating method. It is obvious that the induced graphene film and sandwich structure improves the performance of the DSSCs greatly. Due to the excellent electrical conduction of the graphene, the graphene layer bridges behave as an electron transfer channel which can transport the photoexcited electrons quickly.

(联系人：杨盛谊 教授，13520879277；E-Mail：syyang@bit.edu.cn)