Orientation control of regioregular‐poly(3‐dodecylthiophene) films formed by the friction‐transfer method and the performance of organic photovoltaic devices based on these films

Mizokuro, Toshiko; Okamoto, Yukiyasu; Heck, Claire; Aota, Hiroyuki; Tanigaki, Nobutaka

doi:10.1002/app.40136

Cited by 16 publications

(15 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…16,17 Originally, a polymer aligned film was achieved by the mechanically stretch method in 1995. Mechanical friction is widely applied to prepare aligned film by rubbing the LC film with cloth or a Teflon rod 36,37 or depositing the LC materials onto a rubbed aligned substrate, e.g. LC temperature.…”

Section: Methods To Prepare Aligned Films For Polarised Emissionmentioning

confidence: 99%

Recent progress in luminescent liquid crystal materials: design, properties and application for linearly polarised emission

et al. 2015

View full text Add to dashboard Cite

Luminescent liquid crystals (LCs) materials have attracted significant interests for organic optoelectronic applications, especially for linearly polarised emission, becaused of their combination of ordered alignment and luminescence property. Since the first polarised organic light-emitting diodes (OLEDs) demonstration in 1995, remarkable progress has been done with polarised electroluminescence because of continuous advances with the design of suitable LC materials. In this Review, we summarize luminescent LC materials with representative examples based on fluorescent materials, phosphorescent materials, and lanthanide complexes. The structure-property relationships for polarised emission and, when available, electroluminescence of these materials are presented and discussed, with a focus on phosphorescent metallomesogens. We also present the rational behind the design and development of luminescent LCs materials for high efficiency polarised OLEDs, along with the challenges ahead to achieve efficient devices.

show abstract

Section: Methods To Prepare Aligned Films For Polarised Emissionmentioning

confidence: 99%

Recent progress in luminescent liquid crystal materials: design, properties and application for linearly polarised emission

et al. 2015

View full text Add to dashboard Cite

show abstract

“…33,44 Fortunately, the absorption coefficients of these modes are large enough to analyze the molecular orientation in a thin film. Therefore, the (C-H) and (C=C) bands are both quite useful for discussing the orientation of the thiophene ring 11,13,24,44 and the polymer skeleton 33,44 in a thin film ( Figure 5).…”

Section: Uv-vis Measurementsmentioning

confidence: 99%

A new schematic for poly(3-alkylthiophene) in an amorphous film studied using a novel structural index in infrared spectroscopy

Shioya

Shimoaka

Eda

et al. 2015

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

The molecular structure of poly(3-alkylthiophene-2,5-diyl) in an amorphous film reveals that the short axis of the thiophene ring is kept highly oriented parallel to the substrate, whereas the long axis along the polymer chain is largely disordered. This is unveiled by infrared p-polarized multiple-angle incidence resolution spectroscopy (pMAIRS), achieved by analyzing the orientation angles of three mutually orthogonal vibrational modes localized on the thiophene ring with the aid of a newly developed structural index. This new analytical technique is useful irrespective of the crystallinity of the thin film. As a result, the intrinsic chemical parameters controlling the molecular orientation are understood in a unified manner, and the reason that the hexyl group gives the best results for a photovoltaic cell is also revealed.

show abstract

“…Furthermore, in order to evaluate the orientation of the crystallites regarding the substrate plane, energy-dispersive (ED) GIXD measurements [ 39 , 40 , 41 ] were carried out. The schematic diagram of ED-GIXD geometry is illustrated in Figure 1 b.…”

Section: Methodsmentioning

confidence: 99%

Oriented Thin Films of Insoluble Polythiophene Prepared by the Friction Transfer Technique

et al. 2021

Self Cite

View full text Add to dashboard Cite

A thin film of unsubstituted polythiophene (PT), an insoluble conjugated polymer, with molecular chains uniaxially oriented in plane was prepared by the friction transfer method. The structure of highly oriented thin films of PT was investigated using grazing-incidence X-ray diffraction (GIXD), ultraviolet–visible (UV–vis) spectroscopy, and infrared (IR) spectroscopy. The polarized UV–vis and IR spectra and GIXD measurements showed the PT molecular chains were well aligned in parallel to the friction direction. The GIXD studies clarified that the polymer backbones were aligned with very narrow distribution, such that the half-width was about 4 degrees. The degree of orientation of the PT friction-transferred film was higher compared with those of regioregular poly(3-alkylthiophene)s. Moreover, the GIXD results show a preferred orientation where the a-axis is perpendicular to the substrate plane.

show abstract

Orientation control of regioregular‐poly(3‐dodecylthiophene) films formed by the friction‐transfer method and the performance of organic photovoltaic devices based on these films

Cited by 16 publications

References 29 publications

Recent progress in luminescent liquid crystal materials: design, properties and application for linearly polarised emission

Recent progress in luminescent liquid crystal materials: design, properties and application for linearly polarised emission

A new schematic for poly(3-alkylthiophene) in an amorphous film studied using a novel structural index in infrared spectroscopy

Oriented Thin Films of Insoluble Polythiophene Prepared by the Friction Transfer Technique

Contact Info

Product

Resources

About