Photophysics of Charge Separation Nanoparticle-Polymer Systems

3 Photophysics of Charge Separation Nanoparticle-Polymer Systems 

The mechanisms for charge generation and separation upon optical excitation and light emission are different for the spherical nanoparticles and essentially linear chain polymers. 

Hybrid systems based on these different class of materials reveal interesting electronic and optical properties and add further insight into the individual characteristics of the different components. The photovoltaic properties rely on efficient charge separation upon photoexcitation. Pristine polymers have a problem with large amounts of disorder and low mobilities, in spite of large absorption. Many of the properties of polymer systems will be examined with three different varieties of nanoparticles  

The various properties of these systems are explored and provide a glimpse of the richness in terms of photophysical and electronic processes. 

Ti02 particles have been traditionally interesting to study due to a wide variety of applications. Ti02 occurs as the mineral rutile, anatase, octahedrite, ilmenite, and brookite, and exhibits distinct size effects. Anatase Ti02 is used widely for welding-rod coatings, acid-resistant vitreous enamel, specific paints, etc. Below a critical size, Ti02 clusters can 

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