Functionalized Graphene/Ag nanoparticles Bi-layer to enhance the efficiency of polymer solar cells

3rd International Conference on New Material and Chemical Industry

材料科学;化学工业

Ou, C.F.^1 ; Chen, Y.F.^1

Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung County

411, Taiwan^1

关键词: Functionalized graphene;    Functionalized graphene (fGNS);    High carrier mobility;    Hole transport layers;    Photovoltaic performance;    Polyethylenedioxythiophene;    Polystyrene sulfonic acid;    Power conversion efficiencies;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/479/1/012117/pdf
DOI  :  10.1088/1757-899X/479/1/012117

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

We prepared graphene oxide (GO) by a modified Hummer's method, and synthesized octylamine functionalized graphene (F-GNS) using long-chain octylamine as the functionalization agent. We synthesized oleic acid silver nanoparticles (OA-Ag) by the redox method. We investigated the effect of incorporating F-GNS/OA-Ag bi-layer between poly(ethylene dioxythiophene) (PEDOT)-polystyrene sulfonic acid (PSS) (PEDOT:PSS) hole transport layer (HTL) and active layer (P3HT:PC71BM = 1:1 weight ratio) on the photovoltaic performance. The cell structure was glass/ITO/PEDOT:PSS/F-GNS/OA-Ag/P3HT: PC71BM/Ca/Al. Four concentrations of F-GNS N-methyl pyrrolidone (NMP) solution of 0.05, 0.1, 0.3 and 0.5 mg/ml were prepared. We used the UV-Vis, SPM, FE-SEM and solar simulator to measure the absorbance, roughness, surface morphology, and power conversion efficiency (PCE), respectively. From these results, we found that the short circuit current density(J sc ) and PCE of the cells with F-GNS/OA-Ag are always higher than those of cell without F-GNS/OA-Ag. The cell with 0.1 mg/ml F-GNS/OA-Ag bi-layer had the highest J sc of 8.51 mA/cm2, an increase of 32% and the highest PCE of 2.96%, an increase of 28% compared to the reference cell. These improvements were due to the high carrier mobility of graphene.