Improving operation lifetime of OLED by using thermally activated delayed fluorescence as host

Hu, Juntao; Hu, Sheng; Ye, Kang-li; Wei, Qing-qing; Xu, Kai; Wang, Xiang-hua

doi:10.1007/s11801-017-7055-0

Cited by 4 publications

(1 citation statement)

References 19 publications

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“…This was due to the lower glass transition temperature (T g ) of CBP (62 °C) than that of PVK (200 °C). [36,37] The low T g of CBP induces a high RMS roughness owing to the fast polymeric crystallization of PVK-CBP films. A rougher surface increases the effective surface area to react with the upper layer, resulting in a smaller water contact angle, as shown in Figure S7, Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

Energy and Charge Dual Transfer Engineering for High‐Performance Green Perovskite Light‐Emitting Diodes

Baek

Kim

et al. 2022

Adv Funct Materials

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Perovskite light-emitting diodes (PeLEDs) have garnered considerable interest in recent years owing to their unique optoelectronic properties. However, the performance of PeLEDs is limited by their low quantum efficiency and unbalanced charge injection. In this study, to address these issues, a novel co-hole transport layer (HTL) of 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP) and poly(9-vinylcarbazole) (PVK) is introduced into PeLEDs. By optimizing the composition ratio of CBP and PVK, the performance of CsPbBr 3 -based PeLEDs is significantly improved via efficient Förster resonant energy transfer and an enhanced charge transfer owing to the well-aligned energy levels of the HTLs with the emission layers. The PeLED with an optimized composition ratio of the PVK 0.5 -CBP 0.5 HTL exhibits the best device performance with a luminance of 31641 cd•m −2 , current efficiency of 39.2 cd•A −1 , and external quantum efficiency of 15.4%. Thus, the proposed strategy engineering dual transfer of energy and charge is expected to be revolutionary in the field of PeLED research.

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Section: Resultsmentioning

confidence: 99%

Energy and Charge Dual Transfer Engineering for High‐Performance Green Perovskite Light‐Emitting Diodes

Baek

Kim

et al. 2022

Adv Funct Materials

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Design, synthesis and characterization of π-conjugated 2,5-diphenylsubstituted-1,3,4-oxadiazole-based D-π-A-π’-D′ form of efficient deep blue functional materials: Photophysical properties and fluorescence “Turn-off” chemsensors approach

Najare

Patil

Garbhagudi

et al. 2021

Journal of Molecular Liquids

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Thermal Properties, Molecular Structure, and Thin-Film Organic Semiconductor Crystallization

et al. 2020

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The crystallinity of a group of organic small molecules is investigated by vapor depositing the materials into thin films followed by a thermal annealing step. The materials are categorized into three groups: platelet-forming, spheruliteforming, and those that resist crystallization. Differential scanning calorimetry is utilized to determine the bulk thermal properties of these materials, which provide a reliable indicator of a material's crystallization motif. Platelet-forming materials tend to be characterized by high melting points (T m ) and high magnitude crystallization driving force at the material's crystallization temperature (ΔG c ). The materials that resist crystallization as a thin film have small ΔG c . These results provide guidelines that can help determine which organic molecules have a greater likelihood of growing into large-scale crystalline frameworks, a key step for improving the charge carrier mobility and exciton diffusion length in organic semiconductors.

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Improving operation lifetime of OLED by using thermally activated delayed fluorescence as host

Cited by 4 publications

References 19 publications

Energy and Charge Dual Transfer Engineering for High‐Performance Green Perovskite Light‐Emitting Diodes

Energy and Charge Dual Transfer Engineering for High‐Performance Green Perovskite Light‐Emitting Diodes

Design, synthesis and characterization of π-conjugated 2,5-diphenylsubstituted-1,3,4-oxadiazole-based D-π-A-π’-D′ form of efficient deep blue functional materials: Photophysical properties and fluorescence “Turn-off” chemsensors approach

Thermal Properties, Molecular Structure, and Thin-Film Organic Semiconductor Crystallization

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