The influence of polaron formation on exciton dissociation

Li, Guangqi

doi:10.1039/c5cp00415b

Title: The influence of polaron formation on exciton dissociation

Journal Article · Wed Apr 01 00:00:00 EDT 2015 · Physical Chemistry Chemical Physics. PCCP

DOI:https://doi.org/10.1039/c5cp00415b· OSTI ID:1210758

Li, Guangqi ^[1]

Northwestern Univ., Evanston, IL (United States)

A linear tight-binding model was used to examine the yield of exciton dissociation under the influence of the electron–vibration interaction. The system consists of a linear chain, coupled to a single vibration, and electron–vibration interaction is permitted to occur on certain sites. In the presence of this interaction, population tends to localize to build a polaron. The system loses polaron trapping energy to the environment through its coupling to the bath environment, and loses population due to the injection into the electrode at the terminal site. A self-energy term was generated from population injection, and was added to the energy level of the last site, working as a sink function to absorb the electrons and measure the yield. This injection occurs only when the electron energy is inside and around the band. When the electron energy is outside the tight-binding band, population injection is inhibited. Our aim here is to investigate the exciton dissociation effected by the competition between polaron formation and population injection, via a process strongly influenced by the inter-site coupling and the electron–vibration interaction.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Center for Bio-Inspired Energy Science (CBES); Energy Frontier Research Centers (EFRC) (United States). Non-Equilibrium Energy Research Center (NERC)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0000989

OSTI ID:: 1210758

Journal Information:: Physical Chemistry Chemical Physics. PCCP, Vol. 17, Issue 17; Related Information: CBES partners with Northwestern University (lead); Harvard University; New York University; Pennsylvania State University; University of Michigan; University of Pittsburgh; ISSN 1463-9076

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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