Unmodified small-molecule organic light-emitting diodes by blade coating

Chang, Yu Fan; Chiu, Yu Chian; Yeh, Han; Chang, Hsien‐Ming; Chen, Chun Yu; Meng, Hsin‐Fei; Lin, Huey-Wen; Huang, Hsiu-Lin; Chao, Teng‐Chih; Tseng, Mei-Rurng; Zan, Hsiao‐Wen; Horng, Sheng Fu

doi:10.1016/j.orgel.2012.05.017

Cited by 37 publications

(7 citation statements)

References 13 publications

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“…Improving polymer chain ordering by using solvent annealing or self-assembled monolayer treatment, an output current high enough to drive organic light-emitting diodes (OLEDs) (12-50 mA/cm 2 ) was obtained at a low operation voltage (< 2 V) [3], [4]. Using solution-processed transistors to drive solution-processed OLEDs [5] raphy used in our previous results is not compatible with existing commercialized tools. More importantly, the nanosphere accumulation causes leakage current through large holes [3].…”

Section: Introductionmentioning

confidence: 87%

Solution-Processed Vertical Organic Transistors Fabricated by Nanoimprint Lithography

Wu¹,

Huang

Tsai

et al. 2013

IEEE Electron Device Lett.

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In this letter, we demonstrate the first verticalchannel organic transistor using nanoimprint technology to produce a base electrode with high-density nanometer pores to well control the channel current vertically flowing through the pores. The aspect ratios of nanopores, which determine the switching performance of the vertical transistor, are greatly enhanced by transferring the nanostructure to the underlying layers. Without pore accumulation, a low leakage current can be achieved. The vertical transistor delivers an ON current of 0.35 mA/cm 2 and an ON/OFF current ratio of around 3000 at 1.8 V. The results prove the feasibility to produce low-voltage organic transistors over a large area with potentially low production cost.

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Section: Introductionmentioning

confidence: 87%

Solution-Processed Vertical Organic Transistors Fabricated by Nanoimprint Lithography

Wu¹,

Huang

Tsai

et al. 2013

IEEE Electron Device Lett.

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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%

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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“…Isto se deve a maior pureza, a maior flexibilidade de design molecular e a ausência de variações de distribuição de massa molar das pequenas moléculas. 52 Além disso, os processos de síntese e purificação para obtenção dos polímeros são mais complexos do que para a obtenção das pequenas moléculas, tornando este tipo de material mais caro. Apesar das vantagens das pequenas moléculas orgânicas em relação aos polímeros, sua solubilidade em solventes orgânicos é baixa e a formação de filmes uniformes é difícil devido a fraca interação entre as moléculas.…”

Section: Blade Coatingunclassified

“…21 Na literatura são reportados dois métodos para promover uma rápida remoção do solvente. 21,52 Estes métodos estão ilustrados na Figura 16. No primeiro método chamado de blade spin, o substrato é colocado sobre um equipamento de spin coating, a deposição da solução de semicondutor orgânico é realizada por blade coating e imediatamente após o término da deposição o equipamento de spin coating é ligado e a rotação promove a rápida remoção do solvente.…”

Section: Blade Coatingunclassified

“…21 Outro método reportado na literatura combina o aquecimento inferior por meio de uma placa de aquecimento com o aquecimento superior através de um soprador de ar quente. 52 As temperaturas da placa de aquecimento e do soprador de ar quente devem ser ajustadas perfeitamente uma vez que, se a temperatura for muito elevada, pode ocorrer o amolecimento da camada inferior tornando-a susceptível a dissolução pelo solvente da camada superior. Uma temperatura muito baixa não promove a rápida remoção do solvente da camada superior permitindo sua ação na dissolução da camada inferior.…”

Section: Blade Coatingunclassified

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Desenvolvimento de diodos orgânicos emissores de luz por blade coating.

Hamanaka¹

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Unmodified small-molecule organic light-emitting diodes by blade coating

Cited by 37 publications

References 13 publications

Solution-Processed Vertical Organic Transistors Fabricated by Nanoimprint Lithography

Solution-Processed Vertical Organic Transistors Fabricated by Nanoimprint Lithography

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

Desenvolvimento de diodos orgânicos emissores de luz por blade coating.

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