Charge Trapping and Storage by Composite P3HT/PC60BM Nanoparticles Investigated by Fluorescence-Voltage/Single Particle Spectroscopy
Abbreviated Journal Title
J. Am. Chem. Soc.
SINGLE-MOLECULE SPECTROSCOPY; CONJUGATED POLYMER-MOLECULES; FIELD-EFFECT; TRANSISTORS; HETEROJUNCTION SOLAR-CELLS; LIGHT-EMITTING-DIODES; MEMORY; DEVICES; MEH-PPV; PHOTOLUMINESCENCE; INJECTION; EXCITONS; Chemistry, Multidisciplinary
Fluorescence-voltage/single particle spectroscopy (F-V/SPS) was employed to study exciton-hole polaron interactions and interfacial charge transfer processes for pure poly(3-hexylthiophene) (P3HT) nanoparticles (NPs) and composite P3HT/PC60BM NPs in functioning hole-injection devices. F-V/SPS data collected on a particle-by-particle basis reveal an apparent bistability in the fluorescence-voltage modulation curves for composite NPs of P3HT and [6,6]-phenyl-C-61-butyric acid methyl ester (PC60BM) that is absent for pure P3HT NPs. A pronounced deep trapping of free electrons photogenerated from the composite P3HT/PC60BM NPs at the NP/dielectric interface and hole trapping by fullerene anions in composite P3HT/PC60BM NPs under photoexcitation lies at the basis of this finding. The deep electron trapping effect reported here for composite conjugated polymer/fullerene NPs presents an opportunity for future application of these NPs in nanoscale memory and imaging devices.
Journal of the American Chemical Society
"Charge Trapping and Storage by Composite P3HT/PC60BM Nanoparticles Investigated by Fluorescence-Voltage/Single Particle Spectroscopy" (2011). Faculty Bibliography 2010s. 1403.