Photoinduced electron transfer in composites of conjugated polymers and dendrimers with branched colloidal nanoparticles

Smita Dayal, Nikos Kopidakis, Gary Rumbles

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Charge generation and separation dynamics in donor:acceptor systems based on composites of branched CdSe nanoparticles with a phenyl-cored thiophene-containing dendrimer (4G1-3S), or a low-bandgap conjugated polymer (PCPDTBT) are reported upon exclusive excitation of the donor or the acceptor. Time-resolved microwave conductivity is used to study the dynamics of either transfer of holes from the nanoparticle to dendrimer, or conversely the transfer of electrons from the polymer to the nanoparticle. Higher photoconductance signals and longer decay-times are correlated with device efficiencies, where composites with higher nanoparticle concentration exhibit higher solar photovoltaic power conversion efficiencies and an increase in external quantum efficiencies. This work evaluates the contribution of both components to device performance, but specifically the role of photoexcited nanoparticles.

Original languageEnglish
Pages (from-to)323-337
Number of pages15
JournalFaraday Discussions
Volume155
DOIs
Publication statusPublished - 2012

Fingerprint

Dendrimers
Conjugated polymers
dendrimers
electron transfer
Nanoparticles
nanoparticles
composite materials
Electrons
Composite materials
polymers
Thiophenes
thiophenes
Quantum efficiency
Conversion efficiency
quantum efficiency
Polymers
Energy gap
Microwaves
microwaves
conductivity

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Photoinduced electron transfer in composites of conjugated polymers and dendrimers with branched colloidal nanoparticles. / Dayal, Smita; Kopidakis, Nikos; Rumbles, Gary.

In: Faraday Discussions, Vol. 155, 2012, p. 323-337.

Research output: Contribution to journalArticle

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