Journal ArticleDOI
Molecular level alignment at organic semiconductor-metal interfaces
TLDR
In this article, photoemission spectroscopy was used to investigate the energy properties of interfaces formed by vacuum deposition of four different molecular thin films on various metals, and the results demonstrated the breakdown of the vacuum level alignment rule at interfaces between these organic molecular solids and metals.Abstract:
In order to clarify the electronic structure of metal-molecular semiconductor contacts, we use photoemission spectroscopy to investigate the energetics of interfaces formed by vacuum deposition of four different molecular thin films on various metals. We find that the interface electron and hole barriers are not simply defined by the difference between the work functions of the metals and organic solids. The range of interface Fermi level positions is material dependent and dipole barriers are present at all these interfaces. The results demonstrate the breakdown of the vacuum level alignment rule at interfaces between these organic molecular solids and metals.read more
Citations
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Organic Thin Film Transistors for Large Area Electronics
TL;DR: In this article, the authors present new insight into conduction mechanisms and performance characteristics, as well as opportunities for modeling properties of organic thin-film transistors (OTFTs) and discuss progress in the growing field of n-type OTFTs.
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Small molecular weight organic thin-film photodetectors and solar cells
TL;DR: In this paper, the double heterojunction was proposed to confine excitons within the active layers, allowing substantially higher internal efficiencies to be achieved, and a full optical and electrical analysis of the double-heterostructure architecture leads to optimal cell design as a function of the optical properties and exciton diffusion lengths of the photoactive materials.
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Highly efficient organic devices based on electrically doped transport layers.
TL;DR: Most present-day semiconductor devices use inorganic crystalline materials, with single-crystalline silicon dominating other materials like GaAs by about a factor of 1000, but organic semiconductors have recently gained much attention and are already broadly applied as photoconductors for copiers and laser printers.
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Recent progress of molecular organic electroluminescent materials and devices
L.S Hung,Chin H. Chen +1 more
TL;DR: In this paper, a review is presented on recent progress in organic electroluminescent materials and devices, with emphasis on their material issues pertaining to charge transport, color, and luminance efficiencies.
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Molecular-Scale Electronics: From Concept to Function
TL;DR: This Review covers the major advances with the most general applicability and emphasizes new insights into the development of efficient platform methodologies for building reliable molecular electronic devices with desired functionalities through the combination of programmed bottom-up self-assembly and sophisticated top-down device fabrication.
References
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Carrier tunneling and device characteristics in polymer light‐emitting diodes
TL;DR: In this article, it was shown that the characteristics of light-emitting diodes based upon MEH-PPV are determined by tunneling both the holes and the electrons through interface barriers caused by the band offset between the polymer and the electrodes.
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Chemistry and electronic properties of metal-organic semiconductor interfaces: Al, Ti, In, Sn, Ag, and Au on PTCDA.
Y. Hirose,Antoine Kahn,V. Aristov,V. Aristov,Patrick Soukiassian,Patrick Soukiassian,Vladimir Bulovic,Stephen R. Forrest +7 more
TL;DR: The chemistry and electronic properties of interfaces formed between thin films of the archetype molecular organic semiconductor 3, 4, 9, 10 perylenetetracarboxylic dianhydride and reactive and nonreactive metals are investigated via synchrotron radiation photoemission spectroscopy.
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Energy level alignment at organic/metal interfaces studied by UV photoemission: breakdown of traditional assumption of a common vacuum level at the interface
Hisao Ishii,Kanako Seki +1 more
TL;DR: In this paper, the electrical properties of model interfaces of organic electroluminescent (EL) devices and porphyrin/metal interfaces were investigated by UV photoemission spectroscopy (UPS).
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Energy level offset at organic semiconductor heterojunctions
TL;DR: In this paper, the electronic structure of three organic-organic heterojunctions formed between the standard electrontransport emissive material tris(8-hydroxy-quinoline)aluminum (Alq3) and two hole-transport materials, i.e., 3,4,9,10 perylenetetetricarboxylic dianhydride (PTCDA), and N,N,N′-diphenyl-N, N,bis(l-naphthyl)-1-1′bip
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Energy level alignment at Alq/metal interfaces
TL;DR: In this paper, the energy level alignment for both Mg/8-hydroxyquinoline aluminum (Alq) and Au/Alq interfaces has been determined by the ultraviolet photoemission measurements.