Solution-processable graphene oxide as an efficient hole transport layer in polymer solar cells.
The utilization of graphene oxide (GO) thin films as the hole transport and electron blocking layer in organic photovoltaics (OPVs) is demonstrated. The incorporation of GO deposited from neutral solutions between the photoactive poly(3-hexylthiophene) (P3HT):phenyl-C61-butyric acid methyl ester (PCBM) layer and the transparent and conducting indium tin oxide (ITO) leads to a decrease in recombination of electrons and holes and leakage currents. This results in a dramatic increase in the OPV efficiencies to values that are comparable to devices fabricated with PEDOT:PSS as the hole transport layer. Our results indicate that GO could be a simple solution-processable alternative to PEDOT:PSS as the effective hole transport and electron blocking layer in OPV and light-emitting diode devices.
Li
Shao-Sian
SS
Department of Materials Science and Engineering, National Taiwan University, Taipei 106, Taiwan.
Tu
Kun-Hua
KH
Lin
Chih-Cheng
CC
Chen
Chun-Wei
CW
Chhowalla
Manish
M
D003460:Crystallization / Q000379:methods*; D011211:Electric Power Supplies; D004579:Electron Transport; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000295:instrumentation*; D010087:Oxides / Q000737:chemistry; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D012993:Solar Energy; D012996:Solutions / Q000737:chemistry; D013499:Surface Properties
D046911:Macromolecular Substances; D010087:Oxides; D011108:Polymers; D012996:Solutions; D006108:Graphite