Relationship between Surface Roughness of Indium Tin Oxide and Leakage Current of Organic Light-Emitting Diode

Kim, Ki-Beom; Tak, Yoon‐Heung; Han, Youngho; Baik, Kwang-Heum; Yoon, Myunghee; Lee, Moon-Ho

doi:10.1143/jjap.42.l438

Cited by 96 publications

(42 citation statements)

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“…the functional organic thin films are deposited on ITO, the surface morphology of ITO is directly transferred to the morphology of the organic layers. Therefore, the uneven surface of the hole injecting electrode can have negative effects on device performance by affecting the morphology of the organic thin film [27]. A reduction of the root-mean-square surface roughness (R rms ) of ITO might lead to the improvement of the OLED performance, which has been reported in Refs.…”

Section: Resultsmentioning

confidence: 94%

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Effects of (NH4)2Sx treatment on surface work function and roughness of indium–tin-oxide

Lin

You

Tsai

2007

Applied Surface Science

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Section: Resultsmentioning

confidence: 94%

“…The control of surface morphology of ITO is one of the most serious problems to be resolved for the fabrication of OLEDs with a long lifetime [27,28]. Because all Fig.…”

Section: Resultsmentioning

confidence: 99%

Effects of (NH4)2Sx treatment on surface work function and roughness of indium–tin-oxide

Lin

You

Tsai

2007

Applied Surface Science

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“…Studies have shown that the extent of surface rough− ness of QD films also has a significant impact on the per− formance of the resulting LED [16,17]. Figure 6(b) shows an atomic−force−microscopy (AFM) scan of the mist deposited QD layer.…”

Section: Resultsmentioning

confidence: 99%

Patterned mist deposition of tri-colour CdSe/ZnS quantum dot films toward RGB LED devices

Pickering

Kshirsagar

Rużyłło

et al. 2012

Opto-Electronics Review

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In this experiment a technique of mist deposition was explored as a way to form patterned ultra-thin-films of CdSe/ZnS core/shell nanocrystalline quantum dots using colloidal solutions. The objective of this study was to investigate the feasibility of mist deposition as a patterning method for creating multicolour quantum dot light emitting diodes. Mist deposition was used to create three rows of quantum dot light emitting diodes on a single device with each row having a separate colour. The colours chosen were red, green and yellow with corresponding peak wavelengths of 620 nm, 558 nm, and 587 nm. The results obtained from this experiment show that it is possible to create multicolour devices on a single substrate. The peak brightnesses obtained in this experiment for the red, green, and yellow were 508 cd/m, 507 cd/m, and 665 cd/m, respectively. The similar LED brightness is important in display technologies using colloidal quantum dots in a precursor solution to ensure one colour does not dominate the emitted spectrum. Results obtained in-terms of brightness were superior to those achieved with inkjet deposition. This study has shown that mist deposition is a viable method for patterned deposition applied to quantum dot light emitting diode display technologies.

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“…Early studies have proved that there is an internal phase transition of the dynamic and growth modes of the vapor-deposited one metal film on another metal film in the process of deposition, which is influenced by the conditions such as lattice mismatch, the nature of cohesion and its thickness [19][20][21]. We also know that the quality of each thin film significantly affects the characteristics of the OLEDs [22][23][24], Consequently, the abnormal changes of Au morphology induced by some internal phase transitions can lead to irregular features of current densityvoltage curves in certain region, as shown in the cases of Au=5, 8, 11 nm in Figure 4 (a). .…”

Section: Resultsmentioning

confidence: 99%

An effective intermediate Al/Au electrode for stacked color-tunable organic light emitting devices

Zheng

Choy

2008

SPIE Proceedings

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Bright and efficient stacked color-tunable organic light emitting devices (OLEDs) using intermediate Al/Au electrode have been reported. The effects of the thickness of Al and Au layer on the luminance characteristics have been comprehensively studied. After the optimization, After the optimization, the bottom-emission single-unit OLED of 4,4',4''-Tris(N-3-methylphenyl-N-phenyl-amino) triphenylamine /N,N′-diphenyl-N,N′-bis(1-naphthyl)-(1,1′-biphenyl)-4,4′-diamine /tris(8-hydroxyquinoline) aluminum has a maximum luminance efficiency (η L ) of 3.37 by using Al/Au as the cathode and 2.92 cd/A by using Al/Au as the anode. By introducing the optimized intermediate Al/Au electrode into the stacked color-tunable OLEDs, red unit with maximum η L of 4.73 cd/A and blue unit with maximum η L of 3.96 cd/A have been obtained. The color can be tuned efficiently along a linear route from pure red with the Commission Internationale de l'Eclairage (CIE) coordinates of (0.662, 0.330) to sky blue with the CIE coordinates of (0.155, 0.340). This scheme can be a potential candidate for achieving high brightness and efficient stacked color-tunable OLEDs.

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Relationship between Surface Roughness of Indium Tin Oxide and Leakage Current of Organic Light-Emitting Diode

Cited by 96 publications

References 1 publication

Effects of (NH4)2Sx treatment on surface work function and roughness of indium–tin-oxide

Effects of (NH4)2Sx treatment on surface work function and roughness of indium–tin-oxide

Patterned mist deposition of tri-colour CdSe/ZnS quantum dot films toward RGB LED devices

An effective intermediate Al/Au electrode for stacked color-tunable organic light emitting devices

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