Molecular orientation of copper phthalocyanine thin films on different monolayers of fullerene on SiO2 or highly oriented pyrolytic graphite

Wang, Chenggong; Liu, Xiaoliang; Wang, Congcong; Xu, Xumei; Li, Youzhen; Xie, Fangyan; Gao, Yongli

doi:10.1063/1.4916559

Cited by 12 publications

(13 citation statements)

References 21 publications

(27 reference statements)

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“…Substrate templating with CuI, graphene and other organics have been reported for influencing the face-on or edge-on MPc orientation, and further stacking. 3,7,8 These molecular semiconductors have other vast applications that include gas sensors, electrocatalysts, supercapacitors, etc. to name a few.…”

Section: Introductionmentioning

confidence: 99%

Influence of Iodine Doping on the Structure, Morphology, and Physical Properties of Manganese Phthalocyanine Thin Films

et al. 2018

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Doping with halide ions is a popular method to alter the properties of metal phthalocyanines (MPcs), particularly magnetic and electrical nature of organic semiconductors for applications in spintronic or electronic devices. Doping can cause a structural rearrangement in MPc packing and the physical properties may be correlated with molecular packing. Films of a planar and magnetic MPc, manganese(II)phthalocyanine (MnPc) is chosen for iodine doping study. The optical, magnetic and the electrical properties of pristine and iodine doped MnPc thin films are investigated and can be directly associated with their molecular structure. 2D grazing incidence Synchrotron X-ray diffraction reveals structural disorder in MnPc films upon iodine infusion induced by the reorientation of ordered, edge-on molecular configuration to tilted and face-on configurations in a random fashion. The film morphology changes accordingly, where in the uniform crystallites reorganize in a disordered manner. The ferromagnetic nature of the pristine film gets weakened due to iodine species and favors antiferromagnetic coupling. The study of electrical properties at room temperature by conducting atomic force microscopy reveals that the conductance is enhanced independently of the film thickness due to disorder induced by iodine inclusion.

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Section: Introductionmentioning

confidence: 99%

Influence of Iodine Doping on the Structure, Morphology, and Physical Properties of Manganese Phthalocyanine Thin Films

et al. 2018

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“…For example, pentacene possesses a relatively higher mobility in its b-c plane than a-b plane, as shown in Figure 1e [6,7]. Thus, various substrates, metals [8][9][10], native oxide silica [11][12][13][14], and layered materials [6,7,[15][16][17][18], have been chosen for the growth of high quality thin films. In order to optimize the devices performance, it is essential to clarify how the interactions between molecules and substrates affect the growth of organic thin films.…”

Section: Introductionmentioning

confidence: 99%

Van Der Waals Heterostructures between Small Organic Molecules and Layered Substrates

Huang

Wang

et al. 2016

Crystals

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Two dimensional atomic crystals, like grapheme (G) and molybdenum disulfide (MoS 2 ), exhibit great interest in electronic and optoelectronic applications. The excellent physical properties, such as transparency, semiconductivity, and flexibility, make them compatible with current organic electronics. Here, we review recent progress in the understanding of the interfaces of van der Waals (vdW) heterostructures between small organic molecules (pentacene, copper phthalocyanine (CuPc), perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA), and dioctylbenzothienobenzothiophene (C 8 -BTBT)) and layered substrates (G, MoS 2 and hexagonal boron nitride (h-BN)). The influences of the underlying layered substrates on the molecular arrangement, electronic and vibrational properties will be addressed.

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“…The molecular orientation of both planar and nonplanar MPc molecules on oxide substrates such as SiO 2 is well known. The molecules were shown to preferably have an edge-on orientation [3,7,9,[27][28][29]. In our earlier studies, we have reproducibly obtained different crystallites of PbPc on substrates such as HOPG, Au(111), Si and SiO 2 .…”

Section: Resultsmentioning

confidence: 78%

“…A FDTS layer induces the edge-on arrangement regardless of the crystal phase, while a CuI interlayer induces the formation of triclinic PbPc moieties stacked face-on to the substrate yielding enhanced NIR absorption [6]. Organic molecules such as pentacene, fullerene and sexithiophene have also been utilized for inducing the growth of the triclinic phase [7,8]. These studies indicate that the growth of an organic film depends on the delicate interplay between the substrate-molecule and the molecule-molecule interactions.…”

Section: Introductionmentioning

confidence: 99%

“…In the case of CuPc molecules deposited on C 60 layers on highly oriented pyrolytic graphite (HOPG) or SiO 2 , it has been reported that CuPc attains different orientations resulting in substantial differences in donor-acceptor energy level alignment at the interface. Thus, ordering and orientation of these molecules significantly affect charge carrier injection and transport in semiconductor devices [7]. Pristine substrate surfaces of HOPG and Si themselves can induce orientation control over the growth of MPc structures without the aid of additional templating layers.…”

Section: Introductionmentioning

confidence: 99%

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Templating effect of single-layer graphene supported by an insulating substrate on the molecular orientation of lead phthalocyanine

Madhuri¹,

Sagade²,

Santra³

et al. 2020

Beilstein J. Nanotechnol.

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The influence of single-layer graphene on top of a SiO2/Si surface on the orientation of nonplanar lead phthalocyanine (PbPc) molecules is studied using two-dimensional grazing incidence X-ray diffraction. The studies indicate the formation of a mixture of polymorphs, i.e., monoclinic and triclinic forms of PbPc with face-on (lying down) and edge-on (standing up) PbPc orientations, respectively. The formation of monoclinic fractions is attributed to the presence of the graphene layer directing the π interactions between the highly delocalized macrocycles. The competing interfacial van der Waals forces and molecule–molecule interactions lead to the formation of a small fraction of triclinic moieties. The nanoscale electrical characterization of the thin PbPc layer on graphene by means of conducting atomic force microscopy shows enhanced vertical conductance with interconnected conducting domains consisting of ordered monoclinic crystallites through which the charge transfer occurs via tunneling. These results show the importance of a templating layer to induce the formation of a required phase of PbPc suitable for specific device applications.

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Molecular orientation of copper phthalocyanine thin films on different monolayers of fullerene on SiO2 or highly oriented pyrolytic graphite

Cited by 12 publications

References 21 publications

Influence of Iodine Doping on the Structure, Morphology, and Physical Properties of Manganese Phthalocyanine Thin Films

Influence of Iodine Doping on the Structure, Morphology, and Physical Properties of Manganese Phthalocyanine Thin Films

Van Der Waals Heterostructures between Small Organic Molecules and Layered Substrates

Templating effect of single-layer graphene supported by an insulating substrate on the molecular orientation of lead phthalocyanine

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