Excitons in Nanoscale Systems

Scholes, Gregory D.; Rumbles, Garry

doi:10.1038/nmat1710

Excitons in Nanoscale Systems

Journal Article · Fri Sep 01 00:00:00 EDT 2006 · Nature Materials

DOI:https://doi.org/10.1038/nmat1710· OSTI ID:900716

Scholes, Gregory D.;

Nanoscale systems are forecast to be a means of integrating desirable attributes of molecular and bulk regimes into easily processed materials. Notable examples include plastic light-emitting devices and organic solar cells, the operation of which hinge on the formation of electronic excited states, excitons, in complex nanostructured materials. The spectroscopy of nanoscale materials reveals details of their collective excited states, characterized by atoms or molecules working together to capture and redistribute excitation. What is special about excitons in nanometre-sized materials? Here we present a cross-disciplinary review of the essential characteristics of excitons in nanoscience. Topics covered include confinement effects, localization versus delocalization, exciton binding energy, exchange interactions and exciton fine structure, exciton-vibration coupling and dynamics of excitons. Important examples are presented in a commentary that overviews the present understanding of excitons in quantum dots, conjugated polymers, carbon nanotubes and photosynthetic light-harvesting antenna complexes.

Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC36-08GO28308

OSTI ID:: 900716

Report Number(s):: NREL/JA-270-41018; MainId:63154; UUID:60a482da-f3d4-e411-b769-d89d67132a6d; MainAdminId:45228

Journal Information:: Nature Materials, Journal Name: Nature Materials Journal Issue: 9 Vol. 5

Country of Publication:: United States

Language:: English

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