Imperial College London
Alternate

ProfessorSandrineHeutz

Faculty of Engineering, Department of Materials

Head of the Department of Materials
 
 
 
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Contact

 

+44 (0)20 7594 6727s.heutz

 
 
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Location

 

201.BRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Kim:2020:10.1039/C9MH00355J,
author = {Kim, DK and Lubert-Perquel, D and Heutz, S},
doi = {10.1039/C9MH00355J},
journal = {Materials Horizons},
pages = {289--298},
title = {Comparison of organic and inorganic layers for structural templating of pentacene thin films},
url = {http://dx.doi.org/10.1039/C9MH00355J},
volume = {7},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Pentacene is a key organic semiconductor, which has achieved prominence in transistor applications and as an archetypal material for singlet fission, the process whereby the absorption of one photon leads to the formation of two triplet states. Functional properties of molecules are highly anisotropic, and control over the molecular orientation in thin films with structural templating is commonly implemented as a route for governing the morphology and structure of organic films. Among the structural templating layers, 3, 4, 9, 10 perylenetetracarboxylic dianhydride (PTCDA) and copper (I) iodide (CuI) have been shown to effectively template aromatic systems such as phthalocyanines. Here, we extend their use to pentacene thin films and find that a successful transition to a flat-lying arrangement is achieved with CuI films grown at high temperatures, but not with PTCDA. As a result, we postulate a model based on quadrupole interactions as the driving force behind the molecular orientation of pentacene. A 0.25 eV increase in work function and a two-fold increase in absorption are recorded for the induced flat-lying orientation. Therefore, our templating methodology provides design opportunities for optoelectronic devices that require a predominantly flat-lying orientation.
AU  - Kim,DK
AU  - Lubert-Perquel,D
AU  - Heutz,S
DO  - 10.1039/C9MH00355J
EP  - 298
PY  - 2020///
SN  - 2051-6355
SP  - 289
TI  - Comparison of organic and inorganic layers for structural templating of pentacene thin films
T2  - Materials Horizons
UR  - http://dx.doi.org/10.1039/C9MH00355J
UR  - http://hdl.handle.net/10044/1/71819
VL  - 7
ER  -
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