Single walled carbon nanotube anodes based high performance organic light-emitting diodes with enhanced contrast ratio

Xu, Feng; Zhu, Wen Qing; Yan, Long; Xu, Hong; Xiong, Ling Hao; Li, Jia Heng

doi:10.1016/j.orgel.2011.11.015

Cited by 12 publications

(6 citation statements)

References 36 publications

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“…As a result, the reflection of the injected ambient light from the metal cathode surface is reduced and a better contrast ratio is achieved. As shown in Figure e, the contrast ratio of PEDOT:PSS-coated SWCNT TCF-based device is >3 times higher than that of the conventional ITO-based counterpart …”

Section: Cnt Tcf Applicationsmentioning

confidence: 88%

“…As shown in Figure 20e, the contrast ratio of PEDOT:PSS-coated SWCNT TCF-based device is >3 times higher than that of the conventional ITO-based counterpart. 460 Another potential OLED anode material is metal grids, which sometimes have better optoelectronic properties than SWCNT networks. However, to maintain the high transmittance, there are many large pore regions between the grids.…”

Section: Organic Light-emitting Diodesmentioning

confidence: 99%

“…These properties stimulate the market demand, which in turn encourages the development of the technology. Because the work function of CNTs is ∼4.5–5.2 eV, which is close to that of ITO, CNT TCFs with low sheet resistance and high transmittance have the great potential to replace ITO as the anode material in the fabrication of OLEDs, especially for flexible devices. − The essential properties of some CNT TCF-related anodes have been summarized in Table . Basically, an ideal OLED would have low roughness (in order to have low leakage current) and turn-on voltage along with a high maximum light output and current efficiency.…”

Section: Cnt Tcf Applicationsmentioning

confidence: 99%

Section: Cnt Tcf Applicationsmentioning

confidence: 99%

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Recent Development of Carbon Nanotube Transparent Conductive Films

2016

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Transparent conducting films (TCFs) are a critical component in many personal electronic devices. Transparent and conductive doped metal oxides are widely used in industry due to their excellent optoelectronic properties as well as the mature understanding of their production and handling. However, they are not compatible with future flexible electronics developments where large-scale production will likely involve roll-to-roll manufacturing. Recent studies have shown that carbon nanotubes provide unique chemical, physical, and optoelectronic properties, making them an important alternative to doped metal oxides. This Review provides a comprehensive analysis of carbon nanotube transparent conductive films covering detailed fabrication methods including patterning of the films, chemical doping effects, and hybridization with other materials. There is a focus on optoelectronic properties of the films and potential in applications such as photovoltaics, touch panels, liquid crystal displays, and organic light-emitting diodes in conjunction with a critical analysis of both the merits and shortcomings of carbon nanotube transparent conductive films.

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Section: Cnt Tcf Applicationsmentioning

confidence: 88%

Section: Organic Light-emitting Diodesmentioning

confidence: 99%

Section: Cnt Tcf Applicationsmentioning

confidence: 99%

Section: Cnt Tcf Applicationsmentioning

confidence: 99%

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Recent Development of Carbon Nanotube Transparent Conductive Films

2016

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“…CNTs have also found use as transparent electrodes for hole collection owing to their high work function, replacing indium tin oxide (ITO). However, this is a topic of another review, and we recommend the reader to references . Arena and co‐workers reported that efficiency conversion of hybrid cells based on a conjugated polymer and doped silicon increased by 0.49% upon dispersion of CNTs in the conjugated polymer layer .…”

Section: Introductionmentioning

confidence: 99%

A review on carbon nanotube/polymer composites for organic solar cells

Keru

Ndungu

Nyamori

2014

Int. J. Energy Res.

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SUMMARY Carbon nanotubes (CNTs) have unique properties, such as their electrical conductivity, that enable them to be combined with conducting polymers to form composites for use in organic solar cells (OSCs). It is envisaged that the improved composite has a higher efficiency of green energy and will reduce the cost of these cells. The use of such alternative energy sources also drastically reduces overuse of fossil fuels and consequently limits environmental degradation. This review compares research and performance between conventional silicon solar cells and OSCs. It also discusses OSC photoexcitation and charge carrier generation with the incorporation of CNTs, physicochemical properties of the composites and other factors that affect the efficiencies of OSCs. In addition, properties of CNTs that favour their dispersion in polymer matrices as acceptors and charge carriers to the electrodes are covered. The effects of CNTs containing dopants, such as nitrogen and boron, on charge transfer are discussed. Also, the fabrication techniques of OSCs that include CNT/polymer composite processing and the methods of film deposition on the substrate are described. Finally, the case studies of OSCs containing polymers with single‐walled CNTs, double‐walled CNTs or multi‐walled CNTs are evaluated. Copyright © 2014 John Wiley & Sons, Ltd.

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Review of Sorted Metallic Single‐Walled Carbon Nanotubes

Joo

2021

Adv Materials Inter

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applications, the bandgap dependence, so-called chirality of the nanotubes, often plays a key role; thus, studies on SWCNTs have been conducted to synthesize or purify the nanotubes with a focus on achieving monochirality.Since the discovery of CNTs in 1991 by Iijima et al., [10] significant progress has been achieved with regard to the growth of SWCNTs. These include arc discharge, laser ablation, and chemical vapor deposition (CVD). [11] However, as current synthesis methods are largely limited to producing a mixture of metallic and semiconducting SWCNTs, the major challenge in this field is the designing of engineering processes that are scalable to produce electronically pure SWCNTs. Thus, efforts have also been made to postprocess the synthesized SWCNTs to achieve monochirality. These postprocessing methods include density gradient ultracentrifugation (DGU), [12] DNA wrapping, [13] electrophoresis, [14] gel chromatography, [15] aqueous two-phase extraction (ATPE), [16] surface modification, [14a,17] and polymer wrapping. [18] While the sorting efficiency and scalability of each method vary, many of these sorting protocols have been proven to be extremely successful. Consequently, many areas where unsorted SWCNTs have been applied, especially in electronics, were revisited and the SWCNTs were replaced with highly pure, electronic-grade, mostly semiconducting SWCNTs (s-SWCNTs), and they have shown advantages in many areas of application. [19] In stark contrast, reports on the utilization of sorted, pure metallic SWCNTs (m-SWCNTs) are relatively scarce, despite their enormous potential. For example, recent efforts to replace metal or transparent electrodes in photovoltaics with SWCNTs still rely on unsorted SWCNTs as a base material, where the exceptionally high conductivity of pure m-SWCNTs would be extremely beneficial to the overall performance of the device. [4a] As another example, it has recently been reported that the EMI shielding performance of an m-SWCNT film surpassed that of the unsorted and s-SWCNT films. [6f ] In some cases, applications that have been believed to be in the realm of s-SWCNTs turn out to be better controlled by the utilization of m-SWCNTs. For example, Yanagi et al. recently reported a possible solution to the long-standing thermoelectric tradeoff problem, the problem of which the electrical conductivity (σ) and the Seebeck coefficient (S) tradeoff with each other, resulting in a limited power factor (P). A monotonic increase in both S and σ was observed Since the development of sorting techniques for single-walled carbon nanotubes (SWCNTs), devices where unsorted SWCNTs are applied have been increasingly replaced with electronically enriched SWCNTs to improve device performance. While remarkable success has been achieved in areas where enriched SWCNTs have been applied including conductive coatings, photovoltaics, lithium-ion batteries, thermoelectrics, and electromagnetic interference shields, comprehensive reviews that highlight the impact of electronic monodispersity on de...

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Single walled carbon nanotube anodes based high performance organic light-emitting diodes with enhanced contrast ratio

Cited by 12 publications

References 36 publications

Recent Development of Carbon Nanotube Transparent Conductive Films

Recent Development of Carbon Nanotube Transparent Conductive Films

A review on carbon nanotube/polymer composites for organic solar cells

Review of Sorted Metallic Single‐Walled Carbon Nanotubes

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