Single-particle spectroscopy on conducting polymer-fullerene composite materials for application in organic photovoltaic devices
Abbreviated Journal Title
LIGHT-EMITTING-DIODES; PLASTIC SOLAR-CELLS; CONJUGATED POLYMERS; MOLECULE SPECTROSCOPY; CHARGE-CARRIERS; TEMPERATURE; NANOPARTICLES; PERFORMANCE; MORPHOLOGY; PHOTOPHYSICS; Spectroscopy
The study of the photophysical and optoelectronic properties of a functioning conducting pol ymer device is extremely complicated and is hampered by the complex nanostucture and overall morphology of the conducting polymer materials applied in these devices. Here we discuss a novel approach to investigate this issue spectroscopically in terms of bulk-heterojunction organic photovoltaic devices. Novel composite nanoparticles of the conjugated polymers MEH-PPV and MY Wended with the fullerene PCBM were fabricated and are observed to be excellent simplified model systems for the study of molecular-scale morphology effects at play in these complex nanostructured materials. Single-particle spectroscopy reveals the extent to which variations in polymer-chain folding and interactions between polymer chains and fullerenes affect material mo rphology, spectral properties, and optoelectronic properties, providing a detailed molecular scale insight into the morphological effects at play in the active layers of bulk-heterojunction organic photovoltaic devices that otherwise would be masked by the presence of the bulk.
"Single-particle spectroscopy on conducting polymer-fullerene composite materials for application in organic photovoltaic devices" (2008). Faculty Bibliography 2000s. 368.