Continuous blade coating for multi-layer large-area organic light-emitting diode and solar cell

Chen, Chun-Yu; Chang, Haowen; Chang, Yuh‐Fang; Chang, Bo-Jie; Lin, Yuan-Sheng; Jian, Pei-Siou; Yeh, Han-Cheng; Chien, Hung-Ta; Chen, En-Chen; Chao, Yu‐Chiang; Meng, Hsin‐Fei; Zan, Hsiao‐Wen; Lin, Hao‐Wu; Horng, Shi–Jinn; Cheng, Yen‐Ju; Yen, F.Y.; Lin, I‐Feng; Yang, Hsiu-Yuan; Huang, Kuo-Jui; Tseng, Mei-Rurng

doi:10.1063/1.3636398

Cited by 74 publications

(56 citation statements)

References 20 publications

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“…Due to the variety of polymer molecules, there is great variability in the emission wavelength of polymer light-emitting diodes (PLEDs) [15][16][17]. Most of the conjugated polymers are soluble in water-based solutions and therefore can be deposited with wet chemical coating methods like dip-coating, spin-coating, and printing, which makes them highly suitable for the fabrication of devices on big substrates [18]. Additionally, by using flexible substrates, flexible devices like displays can be created.…”

Section: Emission From Large Polymer Moleculesmentioning

confidence: 99%

Light-Emitting Devices – Luminescence from Low-Dimensional Nanostructures

Mousavi¹,

Mohammdi²,

Haratizadeh³

et al. 2014

Advances in Optical Communication

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Section: Emission From Large Polymer Moleculesmentioning

confidence: 99%

Light-Emitting Devices – Luminescence from Low-Dimensional Nanostructures

Mousavi¹,

Mohammdi²,

Haratizadeh³

et al. 2014

Advances in Optical Communication

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“…[2] Therefore, our group investigated to find the appropriate solution process for the fabrication of device using several kinds of thin film coatings. [3] The blade coating process is performed only in a nitrogen environment and has high material utilization rate, low cost, and enables to enlarge the active device area. On the other hand, the operational lifetime is a very important issue in the OLED that is fabricated by solution process.…”

Section: Introductionmentioning

confidence: 99%

All‐Solution‐Processed Red and Orange‐Red Organic Light‐Emitting Diodes with High‐Efficiencies: The Effect of Mixed‐Host Emissive Layers and Thermal Annealing Treatment

Chang

Yang

et al. 2019

ChemPlusChem

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The instability of the organic light‐emitting diodes (OLEDs) during operation can be attributed to the existence of point defects on the organic layers. In this work, the effect of mixed‐host emissive layer and the thermal annealing treatment were investigated to eliminate defects and to boost the device performance. The mixed‐host system includes 4,4′,4′′‐tri (9‐carbazoyl) triphenylamine (TCTA) and 2,7‐bis(diphenylphosphoryl)‐9, 9′‐spirobi[fluorene] (SPPO13). The mixed‐host emissive layer with thermal annealing treatment showed low roughness and few pinholes, and the devices fabricated from this emissive layer exhibited high efficiencies, high stabilities, and long lifetimes. The red and orange‐red OLEDs exhibited efficiencies of 13.9 cd/A and 24.35 cd/A, respectively. The longest half‐lifetime (L0=500 cd/m2) of the red and orange‐red OLEDs were 158 h and 180 h, respectively. Efforts were made to solve problems in large‐area coating and to reduce the number of defects on in organic layer. Large‐active‐area (active area=3 cm×4 cm) red phosphorescent OLEDs (PhOLEDs) devices were realized with very high current efficiency up to 9 cd/A.

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“…However, these methods face challenges regarding their implementation into existing manufacturing technologies. Consequently, well-established industrial coating methods, such as blademetering [7,8] and spray-coating [9,10] have come to the fore for the deposition of the critical layers in organic solar cells [11], light emitting diodes [12], or even thin film transistors. [13] Among them, electrostatic spraying deposition (ESD) represents a very promising spraying approach, which is based on the electrohydrodynamic atomization of a liquid ejected through a nozzle by means of an electrical field.…”

Section: Introductionmentioning

confidence: 99%

High mobility transistors based on electrospray-printed small-molecule/polymer semiconducting blends

et al. 2016

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Spray-coating techniques have recently emerged as especially effective approaches for the deposition of small semiconducting molecules toward the fabrication of organic field-effect transistors (OFETs). Despite the promising mobility values and the industrial implementation capability of such techniques, the resulted devices still face challenges in terms of morphology control and performance variation. In this work, the efficient process control of electrostatic spraying deposition (ESD) and the excellent film properties of polymer:small molecule blends were successfully combined to develop reliable and high performance transistors. Specifically, a highly efficient blended system of 2,8-difluoro-5,11-bis(triethylsilylethynyl)-anthradithiophene (diF-TES-ADT) and poly(triarylamine) (PTAA) was employed in order to realize top-gate OFETs under ambient conditions, both on rigid and on flexible substrates. The films revealed an extensive crystallization and microstructural organization implying a distinct phase separation in the electrosprayed blend. Furthermore, we investigated the effects of the processing temperature on the film-forming properties by means of film continuity and grains boundaries.Remarkably, the electrosprayed OFETs exhibited field-effect mobilities as high as 1.71 cm 2 /Vs, and enhanced performance consistency when compared to conventional gas-sprayed transistors. Additionally, the transistors showed excellent electrical and environmental stability, indicative of the good interface quality and the selfencapsulation capability of top-gate structure. These results highlight the great potential of electrohydrodynamic atomization techniques for implementation to large-area processing for OFETs fabrication.

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Continuous blade coating for multi-layer large-area organic light-emitting diode and solar cell

Cited by 74 publications

References 20 publications

Light-Emitting Devices – Luminescence from Low-Dimensional Nanostructures

Light-Emitting Devices – Luminescence from Low-Dimensional Nanostructures

All‐Solution‐Processed Red and Orange‐Red Organic Light‐Emitting Diodes with High‐Efficiencies: The Effect of Mixed‐Host Emissive Layers and Thermal Annealing Treatment

High mobility transistors based on electrospray-printed small-molecule/polymer semiconducting blends

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