- Substituted Diindenopyrazinediones with symmetrical Polyalkyl-carbazole for high-efficiency blueish green solution-processable OLED
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Much effort has been devoted to design and synthesize this solution-processable OLEDs, Some significant advances have been achieved with the power efficiencies. However, most of them still lag behind those of evaporated non-doping OLEDs. Two novel peripheral Polyalkyl-carbazole substituted Diindeno-pyrazinediones have been developed for highly-efficient and solution-processable OLEDs. Provide high efficient materials for the solution-processed to reduce costs of OLEDs. By fine-tuning their carriers transfer and injection barriers, solution-processed device based on DTPADIPY-TCz shows highly efficient bluish green emission with a maximum power efficiency (PE) of 6.88?lm?W?1, which is among the highest reported to date for solution-processable fluorescent OLEDs with a relatively low efficiency roll-off.
- Zhang, Lei,Bai, Yongqi,Liu, Zhiyang,Jiang, Weigang,Lei, Tao,Yang, Rongjuan,Islam, Amjad,Zhang, Yumei,Ouyang, Xinhua,Ge, Ziyi
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- Triphenylamine-based small molecules with aggregation-induced emission and mechanochromic luminescence properties for OLED application
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In this work, an orange fluorescent material (TA-DF-BDM) with aggregation-induced emission (AIE) and mechanochromic luminescence (MCL) properties were synthesized and characterized. TA-DF-BDM had shown a clearer MCL with a larger emission color change fro
- Liu, Xing,Wei, Xiaozhen,Miao, Yanqin,Tao, Peng,Wang, Hua,Xu, Bingshe
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- Bipolar fluorophores based on intramolecular charge-transfer moieties of sulfone for nondoped deep blue solution-processed organic light-emitting diodes
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Dipolar emitters exhibited excellent performance in organic light-emitting diode (OLED). However, these molecules had intramolecular charge-transfer (ICT) properties, which posed challenge to obtain deep blue emission. In this study, three fluorophores were designed by introducing carbazole and diphenylamine as electron donors and sulfone as electron acceptor due to their mild charge-accepting properties and twisted angles. These materials appeared almost in vertical angles of the dihedral configuration, and exhibited high thermal and electrochemical stability, suitable for solution-processed OLED. The solution-processed non-doped devices based on these three emitters were realized, where two emissions within the standard deep blue emission range were achieved with the Commission International e de l'Eclairage (CIE) coordinates of (0.16, 0.12) and (0.16, 0.15).
- Cao, Liang,Zhang, Lei,Wei, Qiang,Zhang, Jiasen,Chen, Dongjun,Wang, Sheng,Su, Shi-jian,Wang, Tao,Ge, Ziyi
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- Symmetrical sulfur-containing wet processing type blue organic electroluminescent material as well as preparation method and application thereof
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The invention provides a series of sulfone-containing symmetrical wet process type blue organic electroluminescent materials, which contain sulfones, substituted carbazoles, fluorenes, triphenylamines and derivatives thereof. By a symmetrical design, the electron transmission balance is adjusted; the solubility of molecules is increased by increasing a branched chain of an alkyl chain, wet processing is facilitated and the production cost is reduced. The series of electroluminescent materials relate to the field of electroluminescence, can emit blue and dark blue fluorescence, and can be applied to the fields of OLED (Organic Light Emitting Diode) lighting and OLED display. The material has a strong electron acceptor and a weaker electron donor, a large conjugated structure and a twisted and partially rigid planar structure, the intermolecular force is suppressed, the stability of a device is improved, and high level fluorescence quantum efficiency and blue light material are obtained.
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Paragraph 0052; 0082; 0087; 0088
(2019/10/01)
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- Thianthrene-containing pentabasic condensed nucleus unit derivative and its synthetic method and application
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The invention discloses a thianthrene-containing pentabasic condensed nucleus unit derivative and its synthetic method and an application. The thianthrene-containing pentabasic condensed nucleus unitis obtained by performing ring closure on a ternary cond
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Paragraph 0046; 0047; 0048; 0049; 0058
(2018/04/03)
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- Toward high molecular weight triphenylamine-based hyperbranched polymers
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Two kinds of triphenylamine-containing AB2 monomers carrying or not carrying flexible alkyl chains were synthesized and fully characterized. One-pot Suzuki polycondensation (SPC) was applied to polymerize these monomers to prepare hyperbranched
- Sun, Minghao,Li, Jing,Li, Binsong,Fu, Yaqin,Bo, Zhishan
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p. 2651 - 2658
(2007/10/03)
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