66.4: <i>Invited Paper</i>: High‐Quality White OLEDs and Resource Saving Fabrication Processes for Lighting Application

Komoda, Tsugikazu; Tsuji, Hiroya; Ito, Norihiro; Nishimori, Taisuke; Ide, Nobuhiro

doi:10.1889/1.3500653

Cited by 20 publications

(19 citation statements)

References 6 publications

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“…It is anticipated that the cost of OLED light lighting will continue to decrease as demand increases and manufacturing technology continues to improve. 4,38,39 …”

Section: Device Lifetimementioning

confidence: 99%

Organic light-emitting-diode lighting overview

Tyan¹

2011

J. Photon. Energy

113

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Abstract. For organic light-emitting-diode (OLED) lighting to be successful, it is critical that it be properly positioned in the marketplace. It is also critical that both the performance and cost be competitive against other lighting technologies in the selected marketplace. This presentation gives an overview of OLED lighting technology from these perspectives. It shows that OLED lighting products should be positioned as luminaires and not light bulbs, which affects both the performance and price expectations. Laboratory OLED devices already demonstrated efficacies that are more than competitive against luminaires based on other lighting technologies. There is potential for substantial further improvement in efficacy. The greatest opportunities come from light-extraction efficiency improvements and from an improved blue emitting system. There has been great recent progress in the OLED device lifetime. To be acceptable as luminaires, however, OLED may need even more lifetime improvements. Not all the improvements need to come from OLED technology improvement, however. We discuss other means to effectively improve the lifetime of OLED lighting panels and show why there is optimism that, with volume production, OLED lighting can be competitive against other luminaires even on the first-cost basis. C 2011 Society of Photo-Optical Instrumentation Engineers (SPIE).

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“…It is anticipated that the cost of OLED light lighting will continue to decrease as demand increases and manufacturing technology continues to improve. 4,38,39 …”

Section: Device Lifetimementioning

confidence: 99%

Organic light-emitting-diode lighting overview

Tyan¹

2011

J. Photon. Energy

113

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“…OLEDs have been usually associated to applications that require less intense illumination [4][5][6] . Figure 1a shows a commercial monochromatic OLED with circular geometry and diameter of 76 mm (with red light emission) and Fig.…”

Section: Introductionmentioning

confidence: 99%

Low cost spinner developed for deposition of thin films used in OLED devices

Santos

Takahashi²,

Takimoto³

et al. 2018

RBAV

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This work aims the development of a compact spinner to be used inside the glove-box chamber to deposition of polymeric thin films used in the build of OLED devices. Initially, ten fans extracted of microcomputers were tested with commercial multi-voltage power supply. Four fans were selected based on the standard deviation of speed. A variable power supply was also built in order to get a more detailed response in terms of electrical current and speed in function of applied voltage. The fan that showed less variation of speed with applied voltage was selected for deposition tests using polymeric photoresist solution on the ITO (indium tin oxide) coated glass. This polymer was deposited by spin-coating at different speeds: 1000, 2000, 3000 and 4000 rpm and dried for the thicknesses measurement revealing good uniformity. Finally, three OLED devices were assembled with 2000 and 3000 rpm and the layers were dried under the same conditions. In the structure of the devices were used the materials deposited layer-by-layer: glass/ITO/PEDOT: PSS/Polyfluorene (PFpf)/Al. The OLED devices revealed blue light electroluminescence. The I-V curves showed better performance for OLED devices mounted at 2000 rpm with higher current density and similar appearance to the diode curve.

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“…Organic light emitting diode (OLED) is another candidate of solid-state device for next-generation lighting because it is superior to the conventional light sources due to its high design flexibility, thin appearance, light weight. We have already realized high luminous efficacy of 42 lm/W, long life time (LT50) of over 100,000 h and high color rendering index (CRI) of 90 at 1,000 cd/m 2 [1]. This device had the two-unit structure composed of red/green phosphorescent unit and blue fluorescent unit on a glass substrate with a light outcoupling film attached onto surface of the substrate.…”

Section: Introductionmentioning

confidence: 99%

High-efficiency Technology of White OLEDs

Tsuji

Yamae

Kittichungchit

et al. 2013

J. Photopol. Sci. Technol.

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High-performance all-phosphorescent white devices on a light outcoupling substrate which comprised high-index materials were investigated. The two-unit device composed of the red/blue and red/green phosphorescent units on the light outcoupling substrate achieved high light coupling efficiency of 49%. An electrically and optically optimized two-unit of all phosphorescent white OLED realized low driving voltage of 5.5 V, high luminous efficacy of 114 lm/W and half decay lifetime of over 120,000 h at 1,000 cd/m 2 .

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66.4: Invited Paper: High‐Quality White OLEDs and Resource Saving Fabrication Processes for Lighting Application

Cited by 20 publications

References 6 publications

Organic light-emitting-diode lighting overview

Organic light-emitting-diode lighting overview

Low cost spinner developed for deposition of thin films used in OLED devices

High-efficiency Technology of White OLEDs

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