Electronic structures at the interfaces between copper phthalocyanine and layered materials

Shimada, Toshihiro; Hamaguchi, Koji; Koma, Atsushi; Ohuchi, F. S.

doi:10.1063/1.121210

Cited by 58 publications

(45 citation statements)

References 17 publications

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“…We monitor the vacuum-level alignment of the conductive substrate and the adsorbate by following the energy shift at the interface due to surface dipoles. [43] In the case of a flat band [44] the measured SP is…”

Section: Model and Theorymentioning

confidence: 99%

Quantitative Measurement of the Local Surface Potential of π‐Conjugated Nanostructures: A Kelvin Probe Force Microscopy Study

Liscio

Palermo

Gentilini

et al. 2006

Adv Funct Materials

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We describe a systematic study on the influence of different experimental conditions on the Kelvin probe force microscopy (KPFM) quantitative determination of the local surface potential (SP) of organic semiconducting nanostructures of perylene‐bis‐dicarboximide (PDI) self‐assembled at surfaces. We focus on the effect of the amplitude, frequency, and phase of the oscillating voltage on the absolute surface potential value of a given PDI nanostructure at a surface. Moreover, we investigate the role played by the KPFM measuring mode employed and the tip–sample distance in the surface potential mapping by lift‐mode KPFM. We define the ideal general conditions to obtain a reproducible quantitative estimation of the SP and we find that by decreasing the tip–sample distance, the area of substrate contributing to the recorded SP in a given location of the surface becomes smaller. This leads to an improvement of the lateral resolution, although a more predominant effect of polarization is observed. Thus, quantitative SP measurements of these nanostructures become less reliable and the SP signal is more unstable. We have also devised a semi‐quantitative theoretical model to simulate the KPFM image by taking into account the interplay of the different work functions of tip and nanostructure as well as the nanostructure polarizability. The good agreement between the model and experimental results demonstrates that it is possible to simulate both the change in local SP at increasing tip–sample distances and the 2D potential images obtained on PDI/highly oriented pyrolytic graphite samples. These results are important as they make it possible to gain a quantitative determination of the local surface potential of π‐conjugated nanostructures; thus, they pave the way towards the optimization of the electronic properties of electroactive nanometer‐scale architectures for organic (nano)electronic applications.

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Section: Model and Theorymentioning

confidence: 99%

Quantitative Measurement of the Local Surface Potential of π‐Conjugated Nanostructures: A Kelvin Probe Force Microscopy Study

Liscio

Palermo

Gentilini

et al. 2006

Adv Funct Materials

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show abstract

“…Especially, the use in light emitting diodes has been shown to have a potential field of application [1,2] and some simple devices have been fabricated and tested [3][4][5]. The attractive properties include the very high optical absorption coefficients, relative facility of doping, low refractive index and low density of intrinsic defects as compared to inorganic materials.…”

Section: Introductionmentioning

confidence: 99%

The nature of the electrical conduction and light emitting efficiency in organic semiconductors layers: The case of [m-MTDATA] – [NPB] – Alq3 OLED

Silva

Pereira

2006

Journal of Non-Crystalline Solids

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“…The first four vertical excitation energies are summarized. Only two electronic transitions from ground state (S 0 ) to third excited electronic state (S 3 ) have computed oscillator strength been higher than 0.5 while the other electronic transitions, with smaller oscillator strength have a negligible relevance in experimental works [16][17][18][19].…”

Section: Absorption and Emission Propertiesmentioning

confidence: 99%

Theoretical Investigation of New Organic Electroluminescent Materials Based on 4-Azaindole Groups and Oligopyrrole

Cu¹,

Eo²,

Ia³

et al. 2016

J Appl Computat Math

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Electronic structures at the interfaces between copper phthalocyanine and layered materials

Cited by 58 publications

References 17 publications

Quantitative Measurement of the Local Surface Potential of π‐Conjugated Nanostructures: A Kelvin Probe Force Microscopy Study

Quantitative Measurement of the Local Surface Potential of π‐Conjugated Nanostructures: A Kelvin Probe Force Microscopy Study

The nature of the electrical conduction and light emitting efficiency in organic semiconductors layers: The case of [m-MTDATA] – [NPB] – Alq3 OLED

Theoretical Investigation of New Organic Electroluminescent Materials Based on 4-Azaindole Groups and Oligopyrrole

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