High-performance poly(2,3-diphenyl-1,4-phenylene vinylene)-based polymer light-emitting diodes by blade coating method

Liao, Yung Ming; Shih, Hung Min; Hsu, Kuang Hui; Hsu, Chain Shu; Chao, Yu Chiang; Sheng, Lin; Chen, Chun Yao; Meng, Hsin Fei

doi:10.1016/j.polymer.2011.06.025

Cited by 14 publications

(7 citation statements)

References 31 publications

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“…In addition, the rectification coefficient also increases from 0.5 to ∼2 within the same temperature range, while at temperatures higher than 90°C, in both directions I decreases. This phenomenon could be presumably assigned to changes in the morphological properties of PF‐BT copolymer upon exposure to temperatures above its glass transition . Also, it was found that barrier height values decrease from 0.25 to 0.16 eV within the same temperature range.…”

Section: Resultsmentioning

confidence: 90%

Structure and morphology of nanoporous zno and dark current‐Voltage characteristics of the glass/(TCO)/zno/poly[2,7‐(9,9‐dioctylfluorene)‐alt‐(5,5'‐bithiophene)/ag structure

Ghimpu

Potlog

Resmeriță³

et al. 2015

J of Applied Polymer Sci

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The hybrid organic‐inorganic structure based on glass/(TCO)/nanoporous ZnO/poly[2,7‐(9,9‐dioctylfluorene)‐alt‐(5,5′‐bithiophene)]/Ag that was prepared by physical deposition has been investigated. The structure of the nanostructured ZnO obtained by magnetron sputtering was confirmed by X‐ray diffractometry (XRD) and energy dispersive X‐ray spectroscopy (EDX). Scanning electron microscopy (SEM) analysis proved the existence of short and interconnected zinc oxide (ZnO) fibers, which form a continuous porous network with pores having an average diameter of 100 nm. Current‐voltage (I‐V) curves of the glass/TCO/ZnO/PF‐BT/Ag hybrid structure are similar to those of typical p‐n junctions and stable until 90°C temperature. According to the I‐V characteristics, the dominant mechanism of current flow is based on the generation‐recombination of carriers in the depletion region at low direct biases and also on the injection of carriers at high biases. The reverse branch of the I‐V characteristic, calculated in log‐log scale, shows one segment with a power coefficient of 3/2 at room temperature. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42415.

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Section: Resultsmentioning

confidence: 90%

Structure and morphology of nanoporous zno and dark current‐Voltage characteristics of the glass/(TCO)/zno/poly[2,7‐(9,9‐dioctylfluorene)‐alt‐(5,5'‐bithiophene)/ag structure

Ghimpu

Potlog

Resmeriță³

et al. 2015

J of Applied Polymer Sci

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“…The details were similar to blade coating of organic layers and were reported elsewhere. [16][17][18][19][20][21][22][23] Smooth and uniform IGZO film can be obtained from blade speed below certain values. 24 In FIG.…”

Section: A Device Performancementioning

confidence: 99%

“…One advantage of our inverted solar cell is that the device survives thermal annealing. In normal structure the PCE dropped dramatically 19 when the PBDTTT-C-T:[70]PCBM blend layer was annealed. The thermal stability of the active layer in the inverted structure may also lead to higher lifetime of the device under sunlight illumination.…”

Section: Annealing Of Active Organic Layermentioning

confidence: 99%

Blade-coated sol-gel indium-gallium-zinc-oxide for inverted polymer solar cell

et al. 2016

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The inverted organic solar cell was fabricated by using sol-gel indium-gallium-zinc-oxide (IGZO) as the electron-transport layer. The IGZO precursor solution was deposited by blade coating with simultaneous substrate heating at 120 °C from the bottom and hot wind from above. Uniform IGZO film of around 30 nm was formed after annealing at 400 °C. Using the blend of low band-gap polymer poly[(4,8-bis-(2-ethylhexyloxy)-benzo(1,2-b:4,5-b’)dithiophene)-2,6-diyl-alt- (4-(2-ethylhexanoyl)-thieno [3,4-b]thiophene-)-2-6-diyl)] (PBDTTT-C-T) and [6,6]-Phenyl C71 butyric acid methyl ester ([70]PCBM) as the active layer for the inverted organic solar cell, an efficiency of 6.2% was achieved with a blade speed of 180 mm/s for the IGZO. The efficiency of the inverted organic solar cells was found to depend on the coating speed of the IGZO films, which was attributed to the change in the concentration of surface OH groups. Compared to organic solar cells of conventional structure using PBDTTT-C-T: [70]PCBM as active layer, the inverted organic solar cells showed significant improvement in thermal stability. In addition, the chemical composition, as well as the work function of the IGZO film at the surface and inside can be tuned by the blade speed, which may find applications in other areas like thin-film transistors.

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“…Since the discovery of electroluminescence phenomena in poly( p ‐phenylene vinylene) (PPV), several conjugated polymers have been investigated as alternative materials for organic light‐emitting diodes . Despite advances in the synthesis of new polymers and the improvement of their electro‐optical properties, PPV is still one of the most relevant materials for electroluminescent applications . The ability to hold functional groups enabled extension of their applicability to sensors, solar cells, electroluminescent devices and nonlinear optics …”

Section: Introductionmentioning

confidence: 99%

Micropatterning of poly(p‐phenylene vinylene) by femtosecond laser induced forward transfer

Almeida

Avila

Andrade

et al. 2018

Polymer International

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Conjugated polymers are important materials for optical applications, among which poly(p‐phenylene vinylene) (PPV) has a major role due to its applicability in sensors, organic light‐emitting diodes and large area displays. Despite advances on the synthesis of PPV‐based polymers and the improvements of their properties, its printing process, in particular involving the solid phase, remains unsuitable for the development of electro‐optical microcircuits. This paper demonstrates the printing of PPV from the solid phase in 2D micropatterns. Such an achievement was performed using laser induced forward transfer with femtosecond pulses, which allows area‐selective deposition within reduced scales as thin as ca 100 nm and 5 µm wide. Raman, fluorescence and electrochemical impedance spectroscopies confirm that the printed PPV micropatterns have the same structure, emission spectrum and conductivity as the target material, revealing the conservation of their original properties even after laser irradiation. The printing process was carried out using PPV films, overcoming the insolubility issue of this material. The optical and electrical characterization of the transferred PPV demonstrates the potential of this method for the patterning of electro‐optical microdevices, since luminescence and electrical conductivity were preserved. © 2018 Society of Chemical Industry

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High-performance poly(2,3-diphenyl-1,4-phenylene vinylene)-based polymer light-emitting diodes by blade coating method

Cited by 14 publications

References 31 publications

Structure and morphology of nanoporous zno and dark current‐Voltage characteristics of the glass/(TCO)/zno/poly[2,7‐(9,9‐dioctylfluorene)‐alt‐(5,5'‐bithiophene)/ag structure

Structure and morphology of nanoporous zno and dark current‐Voltage characteristics of the glass/(TCO)/zno/poly[2,7‐(9,9‐dioctylfluorene)‐alt‐(5,5'‐bithiophene)/ag structure

Blade-coated sol-gel indium-gallium-zinc-oxide for inverted polymer solar cell

Micropatterning of poly(p‐phenylene vinylene) by femtosecond laser induced forward transfer

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