Absorption and Quantum Yield of Single Conjugated Polymer Poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) Molecules
Hou, Lei ; Adhikari, Subhasis ; Tian, Yuxi LU ; Scheblykin, Ivan G. LU
and Orrit, Michel
(2017)
In Nano Letters
17(3).
p.1575-1581
- Abstract
We simultaneously measured the absorption and emission of single conjugated polymer poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) molecules in a poly(methyl methacrylate) (PMMA) matrix using near-critical xenon to enhance the photothermal contrast for direct absorption measurements. We directly measured the number of monomers and the quantum yield of single conjugated polymer molecules. Simultaneous absorption and emission measurements provided new insight into the photophysics of single conjugated polymers under optical excitation: quenching in larger molecules is more efficient than in smaller ones. Photoinduced traps and defects formed under prolonged illumination lead to decrease of both polymer fluorescence... (More)
We simultaneously measured the absorption and emission of single conjugated polymer poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) molecules in a poly(methyl methacrylate) (PMMA) matrix using near-critical xenon to enhance the photothermal contrast for direct absorption measurements. We directly measured the number of monomers and the quantum yield of single conjugated polymer molecules. Simultaneous absorption and emission measurements provided new insight into the photophysics of single conjugated polymers under optical excitation: quenching in larger molecules is more efficient than in smaller ones. Photoinduced traps and defects formed under prolonged illumination lead to decrease of both polymer fluorescence and absorption signals with the latter declining slower.
(Less)
- author
- Hou, Lei
; Adhikari, Subhasis
; Tian, Yuxi
LU
; Scheblykin, Ivan G.
LU
and Orrit, Michel
- organization
- publishing date
- 2017-03-08
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- absorption, Conjugated polymer, photothermal, quantum yield, quenching
- in
- Nano Letters
- volume
- 17
- issue
- 3
- pages
- 7 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- pmid:28221806
- wos:000396185800037
- scopus:85014903991
- ISSN
- 1530-6984
- DOI
- 10.1021/acs.nanolett.6b04726
- language
- English
- LU publication?
- yes
- id
- 7840d492-d9b8-4723-895d-78952279679c
- date added to LUP
- 2017-03-23 09:34:50
- date last changed
- 2025-01-07 10:13:50
@article{7840d492-d9b8-4723-895d-78952279679c,
abstract = {{<p>We simultaneously measured the absorption and emission of single conjugated polymer poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) molecules in a poly(methyl methacrylate) (PMMA) matrix using near-critical xenon to enhance the photothermal contrast for direct absorption measurements. We directly measured the number of monomers and the quantum yield of single conjugated polymer molecules. Simultaneous absorption and emission measurements provided new insight into the photophysics of single conjugated polymers under optical excitation: quenching in larger molecules is more efficient than in smaller ones. Photoinduced traps and defects formed under prolonged illumination lead to decrease of both polymer fluorescence and absorption signals with the latter declining slower.</p>}},
author = {{Hou, Lei and Adhikari, Subhasis and Tian, Yuxi and Scheblykin, Ivan G. and Orrit, Michel}},
issn = {{1530-6984}},
keywords = {{absorption; Conjugated polymer; photothermal; quantum yield; quenching}},
language = {{eng}},
month = {{03}},
number = {{3}},
pages = {{1575--1581}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Nano Letters}},
title = {{Absorption and Quantum Yield of Single Conjugated Polymer Poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) Molecules}},
url = {{http://dx.doi.org/10.1021/acs.nanolett.6b04726}},
doi = {{10.1021/acs.nanolett.6b04726}},
volume = {{17}},
year = {{2017}},
}