@article {42582,
	title = {Hybrid core-shell nanoparticles: photoinduced electron-transfer for charge separation and solar cell application},
	journal = {Chemistry of Materials},
	volume = {21},
	year = {2009},
	month = {OCT},
	pages = {5292{\textendash}5299},
	abstract = {<p>We report growth and formation of hybrid core-shell nanoparticle systems, where photoinduced electron-transfer takes place from the II-VI semiconducting core to an organic shell. With the hybrid core-shell nanoparticles, we fabricate devices so that the photoinduced electron-transfer can finally yield photocurrent and result photovoltaic solar cells. Formation of an organic shell-layer on CdSe nanoparticles is supported by electronic absorption spectroscopy. Electron-transfer from the nanoparticle in the core to a number of organic molecules in the shell is established from quenching of photoluminescence intensity of CdSe nanoparticles as well as from a change in the lifetime of photoluminescence emission. Devices based on the hybrid core-shell nanoparticles in a suitable hole-transporting layer with two dissimilar metal electrodes show efficient photovoltaic performance. Here, following the electron-transfer, electrons flow through the organic molecules and holes, left in the nanoparticles, move through the hole-transporting polymer to the opposite electrodes to yield photovoltaic short-circuit current. The role of CdSe nanoparticles in light-harvesting and charge-generation has been substantiated by control experiments with ZnS nanoparticles in the core. In ZnS-based hybrid core-shell systems, photovoltaic performance is low since photoinduced electron-transfer does not occur from ZnS to the dye.</p>},
	doi = {10.1021/cm902404s},
	author = {Guchhait, Asim and Rath, Arup Kumar and Pal, Amlan J.}
}
