Almost completely dedoped electrochemically deposited luminescent films exhibiting excellent LED performance

Gu, Cheng; Tang, Shi; Yang, Bing; Liu, Sui‐Jun; Lv, Ying; Yang, Shumin; Hanif, Muddasir; Lu, Dan; Shen, Fangzhong; Ma, Yan

doi:10.1016/j.electacta.2009.07.023

Cited by 29 publications

(22 citation statements)

References 46 publications

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“…As the scan potential higher than 0.81 V, the anodic current increased rapidly and yielded a potential peak at 0.98 V, which indicated that more carbazole groups were oxidized. Previous studies have shown that the carbazole transformed into cationic radicals during oxidation and then couples effectively with each other to form dimeric carbazole cations . During the negative scan, an obvious reductive peak was observed at the potential of 0.47 V, assigning to the reduction of the dimeric carbazole cation.…”

Section: Resultssupporting

confidence: 61%

Electropolymerized AIE‐active polymer film with high quantum efficiency and its application in OLED

Han

Bai

et al. 2016

J. Polym. Sci. Part A: Polym. Chem.

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A carbazole functionalized electro‐active AIE‐activity molecule, TPE‐DFCz, was designed, synthesized, and well characterized. The clear difference in oxidation potentials between tetraphenylethylene (TPE) unit and carbazole groups was found which guaranteed that polymerization occurred only at the peripheral carbazole groups and the TPE unit remained unchanged. Its luminescent network film was prepared conveniently by electrochemical polymerization (EP). The cross‐linked film exhibited green emission with high quantum efficiency of 63%, relatively smooth surface, and good thermal stability. The effect of different scan cycles on the optical property was also investigated. The electroluminescent device using the optimized polymer film as active layer showed a maximum luminance of 3200 cd m−2 and a maximum luminance efficiency of 1.16 cd A−1 with very low roll‐off of the efficiency. The AIE‐active EP films afford more opportunities to develop polymer films with high quantum efficiency via a simple, effective method and promote the potential applications in display devices. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 707–715

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Section: Resultssupporting

confidence: 61%

Electropolymerized AIE‐active polymer film with high quantum efficiency and its application in OLED

Han

Bai

et al. 2016

J. Polym. Sci. Part A: Polym. Chem.

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“…The POP thin films were formed on an ITO electrode via multicycled cyclic voltammetry (CV) of TPSC. During the first cycle of the positive CV scan, the oxidative potentials of carbazole and spirobifluorene were 0.95 and 1.15 V, respectively ( Figure S1a ) 47 48 49 . Two reductive peaks that appeared at 0.99 and 0.73 V during the negative scan were assigned to the reduction of the cations of spirobifluorene and dimeric carbazole, respectively.…”

Section: Resultsmentioning

confidence: 99%

Cascade exciton-pumping engines with manipulated speed and efficiency in light-harvesting porous π-network films

Huang

et al. 2015

Sci Rep

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Light-harvesting antennae are the machinery for exciton pumping in natural photosynthesis, whereas cascade energy transfer through chlorophyll is key to long-distance, efficient energy transduction. Numerous artificial antennae have been developed. However, they are limited in their cascade energy-transfer abilities because of a lack of control over complex chromophore aggregation processes, which has impeded their advancement. Here we report a viable approach for addressing this issue by using a light-harvesting porous polymer film in which a three-dimensional π-network serves as the antenna and micropores segregate multiple dyes to prevent aggregation. Cascade energy-transfer engines are integrated into the films; the rate and efficiency of the energy-funneling engines are precisely manipulated by tailoring the dye components and contents. The nanofilms allow accurate and versatile luminescence engineering, resulting in the production of thirty emission hues, including blue, green, red and white. This advance may open new pathways for realising photosynthesis and photoenergy conversion.

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“…Compared with EP films based on small molecules precursor, polymer precursor usually presents higher fluorescent efficiency due to its high conjugation. [10] Second, it could have the amplification properties (molecular wire effect) as conjugated polymers. [11] Though, some small molecules precursor could also form the cross-linking network with good fluorescent efficiency, the effective length of the conjugated system is limited by the small molecules themselves.…”

Section: Introductionmentioning

confidence: 99%

A novel electropolymerized fluorescent film probe for TNT based on electro-active conjugated copolymer

Nie

Zhang

et al. 2015

Talanta

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Almost completely dedoped electrochemically deposited luminescent films exhibiting excellent LED performance

Cited by 29 publications

References 46 publications

Electropolymerized AIE‐active polymer film with high quantum efficiency and its application in OLED

Electropolymerized AIE‐active polymer film with high quantum efficiency and its application in OLED

Cascade exciton-pumping engines with manipulated speed and efficiency in light-harvesting porous π-network films

A novel electropolymerized fluorescent film probe for TNT based on electro-active conjugated copolymer

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