Light-emitting dendrimer film morphology: A neutron reflectivity study

S. V. Vickers; H. Barcena; K. A. Knights; R. K. Thomas; J. C. Ribierre; S. Gambino; I. D.W. Samuel; P. L. Burn; Giovanna Fragneto

doi:10.1063/1.3457438

Light-emitting dendrimer film morphology: A neutron reflectivity study

S. V. Vickers, H. Barcena, K. A. Knights, R. K. Thomas, J. C. Ribierre, S. Gambino, I. D.W. Samuel, P. L. Burn, Giovanna Fragneto

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

We have used neutron reflectivity (NR) measurements to probe the physical structure of phosphorescent dendrimer films. The dendrimers consisted of fac-tris(2-phenylpyridyl)iridium(III) cores, biphenyl-based dendrons (first or second generation), and perdeuterated 2-ethylhexyloxy surface groups. We found that the shape and hydrodynamic radius of the dendrimer were both important factors in determining the packing density of the dendrimers. "Cone" shaped dendrimers were found to pack more effectively than "spherical" dendrimers even when the latter had a smaller radius. The morphology of the films determined by NR was consistent with the measured photoluminescence and charge transporting properties of the materials.

Original language	English
Article number	263302
Journal	Applied Physics Letters
Volume	96
Issue number	26
DOIs	https://doi.org/10.1063/1.3457438
Publication status	Published - Jun 28 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.3457438

Cite this

@article{865306d060d347bf90cc5a679a9ebd20,

title = "Light-emitting dendrimer film morphology: A neutron reflectivity study",

abstract = "We have used neutron reflectivity (NR) measurements to probe the physical structure of phosphorescent dendrimer films. The dendrimers consisted of fac-tris(2-phenylpyridyl)iridium(III) cores, biphenyl-based dendrons (first or second generation), and perdeuterated 2-ethylhexyloxy surface groups. We found that the shape and hydrodynamic radius of the dendrimer were both important factors in determining the packing density of the dendrimers. {"}Cone{"} shaped dendrimers were found to pack more effectively than {"}spherical{"} dendrimers even when the latter had a smaller radius. The morphology of the films determined by NR was consistent with the measured photoluminescence and charge transporting properties of the materials.",

author = "Vickers, {S. V.} and H. Barcena and Knights, {K. A.} and Thomas, {R. K.} and Ribierre, {J. C.} and S. Gambino and Samuel, {I. D.W.} and Burn, {P. L.} and Giovanna Fragneto",

year = "2010",

month = jun,

day = "28",

doi = "10.1063/1.3457438",

language = "English",

volume = "96",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "26",

}

TY - JOUR

T1 - Light-emitting dendrimer film morphology

T2 - A neutron reflectivity study

AU - Vickers, S. V.

AU - Barcena, H.

AU - Knights, K. A.

AU - Thomas, R. K.

AU - Ribierre, J. C.

AU - Gambino, S.

AU - Samuel, I. D.W.

AU - Burn, P. L.

AU - Fragneto, Giovanna

PY - 2010/6/28

Y1 - 2010/6/28

N2 - We have used neutron reflectivity (NR) measurements to probe the physical structure of phosphorescent dendrimer films. The dendrimers consisted of fac-tris(2-phenylpyridyl)iridium(III) cores, biphenyl-based dendrons (first or second generation), and perdeuterated 2-ethylhexyloxy surface groups. We found that the shape and hydrodynamic radius of the dendrimer were both important factors in determining the packing density of the dendrimers. "Cone" shaped dendrimers were found to pack more effectively than "spherical" dendrimers even when the latter had a smaller radius. The morphology of the films determined by NR was consistent with the measured photoluminescence and charge transporting properties of the materials.

AB - We have used neutron reflectivity (NR) measurements to probe the physical structure of phosphorescent dendrimer films. The dendrimers consisted of fac-tris(2-phenylpyridyl)iridium(III) cores, biphenyl-based dendrons (first or second generation), and perdeuterated 2-ethylhexyloxy surface groups. We found that the shape and hydrodynamic radius of the dendrimer were both important factors in determining the packing density of the dendrimers. "Cone" shaped dendrimers were found to pack more effectively than "spherical" dendrimers even when the latter had a smaller radius. The morphology of the films determined by NR was consistent with the measured photoluminescence and charge transporting properties of the materials.

UR - http://www.scopus.com/inward/record.url?scp=77954321977&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77954321977&partnerID=8YFLogxK

U2 - 10.1063/1.3457438

DO - 10.1063/1.3457438

M3 - Article

AN - SCOPUS:77954321977

SN - 0003-6951

VL - 96

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 26

M1 - 263302

ER -

Light-emitting dendrimer film morphology: A neutron reflectivity study

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this