Effect of Post Annealing on Performance of Polymer Light-Emitting Devices

Tu, Ming Lung; Su, Yan Kuin; Lü, Wei; Yang, Henglong; Kuo, Tzung Fang; Wen, Ten Chin

doi:10.1143/jjap.44.7482

Cited by 8 publications

(4 citation statements)

References 10 publications

(8 reference statements)

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“…Poly( p -phenyene vinylene) (PPV) for application in optoelectronic fields had attracted great interest [ 1 ]. The polymer has certain advantages, such like low-cost, easy procession, and large-area display over light-emitting diodes (LEDs) made from inorganic material, especially in flexible displays [ 2 ]. Somehow, polymer LED (PLED) has one characteristic that its electron-injection is more difficult than its hole-injection due to the high energy barrier for electron-injection and low electron mobility in organic polymers.…”

Section: Introductionmentioning

confidence: 99%

Hybrid light-emitting diodes from anthracene-contained polymer and CdSe/ZnS core/shell quantum dots

Chen

2014

Nanoscale Res Lett

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In this paper, we added CdSe/ZnS core/shell quantum dots (QDs) into anthracene-contained polymer. The photoluminescent (PL) characteristic of polymer/QD composite film could identify the energy transitions of anthracene-contained polymer and QDs. Furthermore, the electroluminescent (EL) characteristic of hybrid LED also identifies emission peaks of blue polymer and QDs. The maximum luminescence of the device is 970 cd/m2 with 9.1 wt.% QD hybrid emitter. The maximum luminous efficiency is 2.08 cd/A for the same device.

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Section: Introductionmentioning

confidence: 99%

Hybrid light-emitting diodes from anthracene-contained polymer and CdSe/ZnS core/shell quantum dots

Chen

2014

Nanoscale Res Lett

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“…21 Besides, the effects upon the performance of OLEDs by thermal treatment have been investigated. Tu et al 22,23 and Ahn et al 24 have reported the effect of postannealing on the performance of polymer LEDs and blendedlayer OLEDs, respectively. Chen et al 25 reported in situ postgrowth annealing of the organic layer before metal cathode was conducted on tris-͑8-hydroxyqunoline͒ aluminum ͑Alq 3 ͒ to improve the performance of Alq 3 -based OLEDs.…”

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confidence: 99%

Effects of Thermal Annealing on Performance of Organic Light-Emitting Diodes

Chen¹,

Hou

et al. 2007

J. Electrochem. Soc.

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The effects of postfabrication thermal annealing on the performance and stability of organic light-emitting diodes ͑OLEDs͒ were systematically investigated in standard indium tin oxide/4,4Ј,4Љ-tris͑3-methylphenylphenylamino͒triphenylamine/N, NЈ-diphenyl-N, NЈ-bis͑l-naphthyl-phenyl͒-͑1,1Ј-biphenyl͒-4,4Ј-diamine Alq 3 devices. Electrical and optical performance, surface morphology of organic thin films, and operation stability of the devices with different thermal treatments were measured and monitored. It was found that devices that were thermally annealed at 70°C exhibited the best performance. Moreover, those devices had the best thin-film morphology and the lowest degradation of electroluminescent performance. The operating stability of the heat-treated device was improved by a factor of over 1.7 times than annealed devices and a half-brightness lifetime of over 7200 h was obtained. The 70°C thermally annealed devices have modified and enhanced the bonding at the interfaces of the organic layer, resulting in decreased turn-on voltage, less leakage current, higher luminescence, and longer lifetime.

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“…3) The luminous efficiency of PLEDs based with 2,3dibutoxy-1,4-poly(phenylene vinylene) (DBPPV) emissive layer was improved by post-annealing effect. 4) In this paper, we report the post-annealing effect on the electroluminescence of DBPPV-based PLEDs.…”

Section: Introductionmentioning

confidence: 98%

Postdeposition Annealing Effect on Redshift Behavior of Electroluminescence for Polymer Light-Emitting Diodes

Tu¹,

Su²,

2006

Jpn. J. Appl. Phys.

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In this study, polymer light-emitting diodes (PLEDs) with a 2,3-dibutoxy-1,4-poly(phenylene vinylene) (DBPPV) emissive layer were fabricated. After the PLEDs were fabricated, they were postdeposition annealed (post-annealed) at various temperatures, 90, 120, 180, and 210 °C. It was clear that the anomalous current–voltage phenomenon existed at the annealing temperature below 120 °C. The anomalous current–voltage phenomenon was eliminated by post-annealing at temperature of 120 °C and higher. As shown in the electroluminescent (EL) spectra, redshift behavior was found which was attributable to post-annealing effect on the PLEDs. From the measurement of atomic force microscopic (AFM) images, annealing increased the average roughness of DBPPV films. The refractive indexes of DBPPV films also increased because of thermal annealing. That is, thermal annealing increased the number of interchain interactions of DBPPV films. This result caused the redshift behavior of PLED's EL spectrum.

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Effect of Post Annealing on Performance of Polymer Light-Emitting Devices

Cited by 8 publications

References 10 publications

Hybrid light-emitting diodes from anthracene-contained polymer and CdSe/ZnS core/shell quantum dots

Hybrid light-emitting diodes from anthracene-contained polymer and CdSe/ZnS core/shell quantum dots

Effects of Thermal Annealing on Performance of Organic Light-Emitting Diodes

Postdeposition Annealing Effect on Redshift Behavior of Electroluminescence for Polymer Light-Emitting Diodes

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