Structural templating and growth behavior of copper phthalocyanine thin films deposited on a polycrystalline perylenetetracarboxylic dianhydride layer

Hong, Dajung; Rag, Young; Kwak, H. T.; Yim, Sanggyu

doi:10.1063/1.3553884

Cited by 17 publications

(10 citation statements)

References 22 publications

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“…It is concluded that the flat-on structure of H2TTDPz act as a template for formation of the thin-film structure of CuPc. This is similar to the templating effects of PTCDA [6,21,22] and of hydrogen-terminated Si(111) [19], for the CuPc thin films. It is further notable that the flat-on structure of CuPc is maintained up to a film thickness of 60 nm, though the XRD of this film (Fig.…”

Section: Resultssupporting

confidence: 61%

Templating effects of tetrakis(thiadiazole)porphyrazine on the structure and optical properties of copper phthalocyanine thin films

Eguchi

Heutz

Awaga

2017

J. Porphyrins Phthalocyanines

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Molecular templating is an attractive method to improve the crystallinity and control the molecular orientations of organic thin films. Here, we report on the templating effects of an organic ntype semiconductor, tetrakis(thiadiazole)porphyrazine (H2TTDPz), on the structure and optical absorption of a p-type semiconductor, copper phthalocyanine (CuPc). X-ray diffraction measurements for the double layer thin films, CuPc/H2TTDPz, indicate a flat-on structure of CuPc, which is replicated by the structure of the H2TTDPz thin films, even though the CuPc thin films usually form edge-on-type thin films. The optical absorption measurements show new low-energy transitions in the templated CuPc films.

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Section: Resultssupporting

confidence: 61%

Templating effects of tetrakis(thiadiazole)porphyrazine on the structure and optical properties of copper phthalocyanine thin films

Eguchi

Heutz

Awaga

2017

J. Porphyrins Phthalocyanines

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“…6,7 So, understanding the growth dynamics of organic thin films is one of the key issues in the field of organic electronics. In case of heterostructures, such as organic-organic heterostructures 8,9 (for organic diode) and organic-inorganic heterostructures 10 (for electrode/contacts), the knowledge of growth kinetics is of utmost importance, since their interfacial structures can play a crucial role on the scaling properties. However, there has been no report on the scaling behavior and growth dynamics of SnCl 2 Pc on different substrates that are most relevant for device applications.…”

mentioning

confidence: 99%

Surface roughening and scaling behavior of vacuum-deposited SnCl2Pc organic thin films on different substrates

Obaidulla

Giri

2015

Applied Physics Letters

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The evolution of surface morphology and scaling behavior of tin (IV) phthalocyanine dichloride (SnCl2Pc) thin films grown on Si(100) and glass substrates have been studied using atomic force microscopy (AFM) and height-height correlation function analysis. X-ray diffraction measurement confirms the crystalline nature of the SnCl2Pc thin film on glass substrate, while no crystallographic ordering is present for the film grown on Si substrate. The growth exponent β is found to be much larger for the film on glass substrate (0.48 ± 0.07) as compared to that on Si substrate (0.21 ± 0.08), which may be due to the high step-edge barrier, so-called Ehrlich-Schwöbel barrier, resulting in the upward dominant growth on glass substrate. From the 2D fast Fourier transform of AFM images and derived scaling exponents, we conclude that the surface evolution follows a mound like growth. These results imply the superiority of glass substrate over the Si substrate for the growth of device quality SnCl2Pc thin film.

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“…Previously, several studies have identified substrates that have the proper molecule–substrate interactions to induce this “lying-down” morphology for thick, oriented films of polyacenes, perylene-derivatives, and phthalocyanines. The substrates include graphite (highly ordered pyrolitic graphite, HOPG), MoS 2 , copper iodide, alkali metal halides, and even other organic molecules such as perylene-3,4,9,10-tetracarboxylic-3,4,9,10-dianhydride (PTCDA) − and pentacene . One problem, however, is that the integration of films grown on these templates into optoelectronic devices has proven to be challenging because these templates are either partially or completely opaque or poorly conducting.…”

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confidence: 99%

Templating Highly Crystalline Organic Semiconductors Using Atomic Membranes of Graphene at the Anode/Organic Interface

Roy

Bindl

Wang

2012

J. Phys. Chem. Lett.

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Charge and energy transport in organic semiconductors is highly anisotropic and dependent on crystalline ordering. Here, we demonstrate a novel approach for ordering crystalline organic semiconductors, with orientations optimized for optoelectronics applications, by using a single monolayer of graphene as a molecular template. We show, in particular, that large-area graphene can be integrated on metals and oxides to modify their surface energies and used to template copper phthalocyanine (CuPc), a prototypical organic semiconductor. On unmodified substrates, thermally evaporated films of CuPc are small-grained, and the molecules are in the "standing-up" (100) orientation. On graphene modified substrates, CuPc is templated in favorable "lying-down" (112̅) and (012̅) orientations with drastically larger crystal sizes. This results in an 86% increase in the absorption coefficient at 700 nm and should furthermore result in enhanced energy and charge transport. The use of highly conductive and transparent (>95%) graphene membranes as templates is expected to be a foundation for developing future planar and nanostructured organic light-emitting diodes and organic photovoltaics with improved performance.

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Structural templating and growth behavior of copper phthalocyanine thin films deposited on a polycrystalline perylenetetracarboxylic dianhydride layer

Abstract: Interdependence between stress, preferred orientation, and surface morphology of nanocrystalline TiN thin films deposited by dual ion beam sputtering Growth kinetics, structure, and morphology of para-quaterphenyl thin films on gold (111)

Cited by 17 publications

References 22 publications

Templating effects of tetrakis(thiadiazole)porphyrazine on the structure and optical properties of copper phthalocyanine thin films

Templating effects of tetrakis(thiadiazole)porphyrazine on the structure and optical properties of copper phthalocyanine thin films

Surface roughening and scaling behavior of vacuum-deposited SnCl2Pc organic thin films on different substrates

Templating Highly Crystalline Organic Semiconductors Using Atomic Membranes of Graphene at the Anode/Organic Interface

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