Separation of Nickelocene‐Filled Single‐Walled Carbon Nanotubes by Conductivity Type and Diameter

Kharlamova, Marianna V.; Kramberger, Christian; Yanagi, Kazuhiro; Sauer, Markus; Saito, Tetsuya; Pichler, Thomas

doi:10.1002/pssb.201700178

Cited by 9 publications

(15 citation statements)

References 35 publications

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“…In particular, Ghosh et al sorted various chiral species of HiPCO SWNTs with nonlinear density gradients and identified the mirror‐image isomers (enantiomers) of SWNTs by fluorescence and circular dichroism spectra . Enriched metallic SWNTs and specific SWNTs of peapod structure were also separated in subsequent studies …”

Section: Solution‐processed Semiconducting Carbon Nanotube Transistorsmentioning

confidence: 99%

Printable Semiconductors for Backplane TFTs of Flexible OLED Displays

Zhu

Shin

Liu

et al. 2019

Adv Funct Materials

168

130

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Studies on printable semiconductors and technologies have increased rapidly over recent decades, pioneering novel applications in many fields, such as energy, sensing, logic circuits, and information displays. The newest display technologies are already turning to metal oxide semiconductors, i.e., indium gallium zinc oxide, for the improvements needed to drive active matrix organic light-emitting diodes. Convenience and portability will be realized with flexible and wearable displays in the future. This report summarizes recent progress on the development of solution-processed thin film transistors, especially those deposited at low temperatures for next-generation flexible smart displays. The first part provides an overview on the history and current status of displays. Then, recent advances in state-of-the-art solution-processed transistors based on different semiconductors are presented, including metal oxides, organic materials, perovskites, and carbon nanotubes. Finally, conclusions are drawn and the remaining challenges and future perspectives are discussed. a large common cathode (opaque metal). This means that the light emission goes through the backplane and the TFT arrays are able to block the light, resulting in the reduced emission fill factor of the display. This mode is also called bottom emission. One effective way to avoid the light obstruction from TFTs in the backplane is to use top-emitting OLEDs, which have a transparent cathode. [2] In 2004, Pennsylvania State University demonstrated the first flexible phosphorescent AMOLED display with hydrogenated amorphous silicon on a 4 in. polyimide (PI) substrate. [7] One year later, a 48 × 48 organic pentacene TFT-driven AMOLED display on a polyethylene terephthalate (PET) substrate was reported by the same group. [8] In 2005, by employing a top-emission structure, researchers at Sony Corp. demonstrated the first full-color imaging on a flexible AMOLED with a pixel resolution of 80 ppi. [9] In 2013, Samsung Electronics showed curved OLED TVs for the first time. Two years later, the same company unveiled a smartphone with a curved edge display (Galaxy S6 Edge), which used touch sensors to improve the user interface and device design. Most recently, LG Display succeeded in developing the world's first large-size 77 in. transparent and flexible OLED display, which could be rolled up to a radius of 80 mm. [10] The ideal flexible AMOLED backplane should be robust, rollable/bendable, capable of complementary metal oxide semiconductor (CMOS) operation, and should lend itself to low-cost manufacturing. To advance toward next-generation flexible AMOLED displays, two key technological goals should be satisfied during fabrication. One is to develop TFT backplanes with good uniformity, stability, and electrical performance. Amorphous silicon (a-Si) TFTs are well known for their uniform electrical characteristics (µ FE < 1 cm 2 V −1 s −1 and I on /I off > 10 6 ) and have achieved great success in flat-panel LCD displays. However, the relatively low µ FE and the lig...

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Section: Solution‐processed Semiconducting Carbon Nanotube Transistorsmentioning

confidence: 99%

Printable Semiconductors for Backplane TFTs of Flexible OLED Displays

Zhu

Shin

Liu

et al. 2019

Adv Funct Materials

168

130

View full text Add to dashboard Cite

show abstract

“…Then, the filled SWCNTs were separated into metallic and semiconducting fractions by density-gradient ultracentrifugation. The details of the separation procedure are described in Reference [15]. The filled metallic SWCNTs were annealed in a high vacuum (10 −6 mbar) at temperatures between 360 and 1200 • C for 2 h.…”

Section: Methodsmentioning

confidence: 99%

“…The filled metallic and semiconducting SWCNTs can be obtained not only by the filling of SWCNTs separated by conductivity type but also by the separation of the filled SWCNTs. Recently, the authors of [15] performed the separation of nickelocene-filled SWCNTs to metallic and semiconducting fractions by density gradient ultracentrifugation. This approach has advantages, because it allows not only separating the filled SWCNTs but also cleaning them from non-encapsulated substances.…”

Section: Introductionmentioning

confidence: 99%

Nickelocene-Filled Purely Metallic Single-Walled Carbon Nanotubes: Sorting and Tuning the Electronic Properties

Kharlamova

2021

Nanomaterials

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We conducted the filling of single-walled carbon nanotubes (SWCNTs) with nickelocene molecules and separation of the filled SWCNTs by conductivity type by density-gradient ultracentrifugation. We tailored the electronic properties of nickelocene-filled purely metallic SWCNTs by thermal treatment in high vacuum. Our results demonstrated that annealing at low temperatures (360–600 °C) leads to n-doping of SWCNTs, whereas annealing at high temperatures (680–1200 °C) results in p-doping of SWCNTs. We found a correlation between the chemical state of the incorporated substances at different annealing temperatures and its influence on the electronic properties of SWCNTs.

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“…The comparison of fullerene-filled SWCNTs to SWCNTs filled with endohedral fullerenes is an interesting case as it allows for directly accessing the effects of an altered filler on the hosting SWCNTs. This opens the possibility to engineer the band gap very precisely and inspires the use of suitably filled SWCNTs as active channels with ambipolar characteristics [87][88][89][90].…”

Section: Applications Of Filled Swcntsmentioning

confidence: 99%

Applications of Filled Single-Walled Carbon Nanotubes: Progress, Challenges, and Perspectives

Kharlamova

Kramberger

2021

Nanomaterials

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Single-walled carbon nanotubes (SWCNTs), which possess electrical and thermal conductivity, mechanical strength, and flexibility, and are ultra-light weight, are an outstanding material for applications in nanoelectronics, photovoltaics, thermoelectric power generation, light emission, electrochemical energy storage, catalysis, sensors, spintronics, magnetic recording, and biomedicine. Applications of SWCNTs require nanotube samples with precisely controlled and customized electronic properties. The filling of SWCNTs is a promising approach in the fine-tuning of their electronic properties because a large variety of substances with appropriate physical and chemical properties can be introduced inside SWCNTs. The encapsulation of electron donor or acceptor substances inside SWCNTs opens the way for the Fermi-level engineering of SWCNTs for specific applications. This paper reviews the recent progress in applications of filled SWCNTs and highlights challenges that exist in the field.

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Separation of Nickelocene‐Filled Single‐Walled Carbon Nanotubes by Conductivity Type and Diameter

Cited by 9 publications

References 35 publications

Printable Semiconductors for Backplane TFTs of Flexible OLED Displays

Printable Semiconductors for Backplane TFTs of Flexible OLED Displays

Nickelocene-Filled Purely Metallic Single-Walled Carbon Nanotubes: Sorting and Tuning the Electronic Properties

Applications of Filled Single-Walled Carbon Nanotubes: Progress, Challenges, and Perspectives

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