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Light harvesting in silicon (111) surfaces using covalently attached protoporphyrin IX dyes

Light harvesting in silicon (111) surfaces using covalently attached protoporphyrin IX dyes
Light harvesting in silicon (111) surfaces using covalently attached protoporphyrin IX dyes
We report the photosensitization of crystalline silicon via energy transfer using covalently attached protoporphyrin IX (PpIX) derivative molecules at different distances via changing the diol linker to the surface. The diol linker molecule chain length was varied from 2 carbon to 10 carbon lengths in order to change the distance of PpIX to the Si(111) surface between 6Å and 18Å. Fluorescence quenching as a function of the PpIX-Si surface distance showed a decrease in the fluorescence lifetime by almost two orders of magnitude at the closest separation. The experimental fluorescence lifetimes are explained theoretically by a classical Chance-Prock-Silbey model. At a separation below 2 nm, we observe for the first time, a Förster-like dipole-dipole energy transfer with a characteristic distance of Ro = 2.7 nm.
1359-7345
12120-12123
Alderman, Nicholas
e840e823-2cac-4250-871a-bbe0f31a25be
Danos, Lefteris
c8d070de-d46a-4daa-95cb-5f37b8dbfb50
Fang, Liping
30769c2e-b4c2-4c06-adfc-6f01fab63db3
Grossel, Martin
403bf3ff-6364-44e9-ab46-52d84c6f0d56
Markvart, Tom
f21e82ec-4e3b-4485-9f27-ffc0102fdf1c
Alderman, Nicholas
e840e823-2cac-4250-871a-bbe0f31a25be
Danos, Lefteris
c8d070de-d46a-4daa-95cb-5f37b8dbfb50
Fang, Liping
30769c2e-b4c2-4c06-adfc-6f01fab63db3
Grossel, Martin
403bf3ff-6364-44e9-ab46-52d84c6f0d56
Markvart, Tom
f21e82ec-4e3b-4485-9f27-ffc0102fdf1c

Alderman, Nicholas, Danos, Lefteris, Fang, Liping, Grossel, Martin and Markvart, Tom (2017) Light harvesting in silicon (111) surfaces using covalently attached protoporphyrin IX dyes. Chemical Communications, 53, 12120-12123. (doi:10.1039/C7CC04767C).

Record type: Article

Abstract

We report the photosensitization of crystalline silicon via energy transfer using covalently attached protoporphyrin IX (PpIX) derivative molecules at different distances via changing the diol linker to the surface. The diol linker molecule chain length was varied from 2 carbon to 10 carbon lengths in order to change the distance of PpIX to the Si(111) surface between 6Å and 18Å. Fluorescence quenching as a function of the PpIX-Si surface distance showed a decrease in the fluorescence lifetime by almost two orders of magnitude at the closest separation. The experimental fluorescence lifetimes are explained theoretically by a classical Chance-Prock-Silbey model. At a separation below 2 nm, we observe for the first time, a Förster-like dipole-dipole energy transfer with a characteristic distance of Ro = 2.7 nm.

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C7CC04767C - Accepted Manuscript
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More information

Accepted/In Press date: 18 October 2017
e-pub ahead of print date: 19 October 2017
Published date: 18 November 2017

Identifiers

Local EPrints ID: 415506
URI: https://eprints.soton.ac.uk/id/eprint/415506
ISSN: 1359-7345
PURE UUID: f3ea3730-4e81-49d6-954b-f17a940f7e01
ORCID for Martin Grossel: ORCID iD orcid.org/0000-0001-7469-6854

Catalogue record

Date deposited: 13 Nov 2017 17:30
Last modified: 29 Aug 2019 04:36

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