title: Multichromophoric organic molecules encapsulated in polymer nanoparticles for artificial light harvesting.
abstract: We designed a self-assembled multichromophoric organic molecular arrangement inside polymer nanoparticles for light-harvesting antenna materials. The self-assembled molecular arrangement of quaterthiophene molecules was found to be an efficient light-absorbing antenna material, followed by energy transfer to Nile red (NR) dye molecules, which was confined in polymer nanoparticles. The efficiency of the antenna effect was found to be 3.2 and the effective molar extinction coefficient of acceptor dye molecules was found to be enhanced, which indicates an efficient light-harvesting system. Based on this energy-transfer process, tunable photo emission and white light emission has been generated with 14 % quantum yield. Such self-assembled oligothiophene-NR systems encapsulated in polymer nanoparticles may open up new possibilities for fabrication of artificial light harvesting system.
authors.affiliation: Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700 032 (India).
authors.forename: Santanu
authors.initials: S
authors.lastname: Bhattacharyya
authors.forename: Bikash
authors.initials: B
authors.lastname: Jana
authors.forename: Amitava
authors.initials: A
authors.lastname: Patra
keywords: energy transfer; light harvesting; polymer nanoparticles; self-assembly; white light