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Insights on tunneled electrons for electrical and photoelectric behaviors in conducting multilayer films



We demonstrate here the layer-by-layer (LbL) self-assembly of conducting [poly(styrene sulfonate)-poly(vinyl alcohol)/polypyrrole]n [(PSS-PVA/PPy)n] multilayer film with interesting electrical and photoelectric features. Increments in sheet conductivity and photoelectric response with increasing bilayer number are pioneerly recorded. The fantastic phenomenon is determined as the accumulative electrons tunneled across insulating PSS from bottom to top PPy chains. The resulting multilayer films give a linear growth in bulk conductivity and maximum photocurrent density. Careful examination of data and characterizations indicates that the fantastic effects in electrical conduction and photocurrent are accumulative electrons tunneled across PSS from bottom to top PPy. POLYM. ENG. SCI., 55:107–112, 2015. © 2014 Society of Plastics Engineers