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Organic and Hybrid Light Emitting Materials and Devices XXV最新文献

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Efficient near-infrared organic radical-based light-emitting diodes 高效的近红外有机基发光二极管
Organic and Hybrid Light Emitting Materials and Devices XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2598149
Hwan-Hee Cho, Shun Kimura, N. Greenham, Tetsuro Kusamoto, Richard C. Friend, E. W. Evans
{"title":"Efficient near-infrared organic radical-based light-emitting diodes","authors":"Hwan-Hee Cho, Shun Kimura, N. Greenham, Tetsuro Kusamoto, Richard C. Friend, E. W. Evans","doi":"10.1117/12.2598149","DOIUrl":"https://doi.org/10.1117/12.2598149","url":null,"abstract":"Despite extensive research on near-infrared organic light-emitting diodes (OLEDs), the external quantum efficiency (EQE) of these devices are far lower than devices with visible light emission. Recently, doublet fluorescent emission from organic radicals has emerged as a new route to more efficient light-emitting devices than those using established non-radical organic emitters. Charge recombination in radical devices results in doublet excitons with nanosecond emission and avoids the efficiency limit usually associated with singlets and triplets. For the application of the organic radicals to near-infrared electroluminescence, the novel near-infrared radical emitter showing around 800 nm emission was designed. Using the organic radical, not only higher than 5% EQE was attained but also the efficiency roll-off and operational lifetime were substantially improved in addition to decreasing turn-on and driving voltage significantly.","PeriodicalId":19672,"journal":{"name":"Organic and Hybrid Light Emitting Materials and Devices XXV","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85108165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In silico material design and multiscale charge transport simulation for OLEDs 有机发光二极管的硅材料设计与多尺度电荷输运模拟
Organic and Hybrid Light Emitting Materials and Devices XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2595137
H. Kaji
{"title":"In silico material design and multiscale charge transport simulation for OLEDs","authors":"H. Kaji","doi":"10.1117/12.2595137","DOIUrl":"https://doi.org/10.1117/12.2595137","url":null,"abstract":"In this study, we will present two topics. One is a systematic in silico material design for thermally activated delayed fluorescence (TADF) with very fast reverse intersystem crossing (RISC). The other is our recently-developed multiscale charge transport simulation based on the combination of quantum chemical calculations, molecular dynamics simulations, and kinetic Monte Carlo simulations. Using the simulation, we will investigate what happens in the emitter layer of organic light-emitting diodes.","PeriodicalId":19672,"journal":{"name":"Organic and Hybrid Light Emitting Materials and Devices XXV","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88611180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Simultaneous low-order phase suppression and defect passivation for efficient and stable blue light emitting diodes 高效稳定蓝光发光二极管的低阶相位抑制和缺陷钝化
Organic and Hybrid Light Emitting Materials and Devices XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2595122
W. Choy
{"title":"Simultaneous low-order phase suppression and defect passivation for efficient and stable blue light emitting diodes","authors":"W. Choy","doi":"10.1117/12.2595122","DOIUrl":"https://doi.org/10.1117/12.2595122","url":null,"abstract":"","PeriodicalId":19672,"journal":{"name":"Organic and Hybrid Light Emitting Materials and Devices XXV","volume":"98 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72548758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of multi-resonance thermally activated delayed fluorescence materials for organic light-emitting diodes 有机发光二极管用多共振热激活延迟荧光材料的设计
Organic and Hybrid Light Emitting Materials and Devices XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2594087
E. Zysman‐Colman
{"title":"Design of multi-resonance thermally activated delayed fluorescence materials for organic light-emitting diodes","authors":"E. Zysman‐Colman","doi":"10.1117/12.2594087","DOIUrl":"https://doi.org/10.1117/12.2594087","url":null,"abstract":"We present our recent efforts for the design of high-colour purity multiresonant TADF emitters. We will present examples ranging from near-UV to orange emitters. We demonstrate how it is possible to accurately predict their photophysical properties and how computations guide molecular design, producing high-performance OLEDs.","PeriodicalId":19672,"journal":{"name":"Organic and Hybrid Light Emitting Materials and Devices XXV","volume":"4 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72553056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Generative machine learning for accelerated discovery of OLED materials
Organic and Hybrid Light Emitting Materials and Devices XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2598141
H. Abroshan, Shaun H. Kwak, Yuling An, C. Brown, M. Halls
{"title":"Generative machine learning for accelerated discovery of OLED materials","authors":"H. Abroshan, Shaun H. Kwak, Yuling An, C. Brown, M. Halls","doi":"10.1117/12.2598141","DOIUrl":"https://doi.org/10.1117/12.2598141","url":null,"abstract":"Development and characterization of novel OLED materials by traditional computational approaches are challenging owing to the complex factors that simultaneously influence the device performance. In this work, we will provide an overview of generative OLED materials discovery using the latest deep neural network formalism, and show an illustrative example to design novel OLED hole-transport materials. The outcome of the work will demonstrate the value of systematic and fundamental understanding of structure-property correlations that can lead to rational design of smart OLEDs with higher efficiency.","PeriodicalId":19672,"journal":{"name":"Organic and Hybrid Light Emitting Materials and Devices XXV","volume":"19 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76808014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Rational design of metal-free organic chromophores to form efficient room temperature persistent luminescent molecular crystals via H-bond-directed supramolecular self-assembly 合理设计无金属有机发色团，通过氢键导向的超分子自组装形成高效的室温持续发光分子晶体
Organic and Hybrid Light Emitting Materials and Devices XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2594420
Catherine Demangeat, Yixuan Dou, Bin Hu, Y. Bretonnière, C. Andraud, A. D'Aléo, J. Wu, Eunkyoung Kim, T. L. Bahers, A. Attias
{"title":"Rational design of metal-free organic chromophores to form efficient room temperature persistent luminescent molecular crystals via H-bond-directed supramolecular self-assembly","authors":"Catherine Demangeat, Yixuan Dou, Bin Hu, Y. Bretonnière, C. Andraud, A. D'Aléo, J. Wu, Eunkyoung Kim, T. L. Bahers, A. Attias","doi":"10.1117/12.2594420","DOIUrl":"https://doi.org/10.1117/12.2594420","url":null,"abstract":"Long-lived room temperature ‘phosphorescence’ from organic molecular crystals has attracted great attention owing to potential applications in organic electronics, information storage, and biotechnologies. The features of the persistent luminescence strongly depend on the electronic properties of the individual molecules, and on their molecular packing in the crystal lattice. Here, a new strategy is developed by rationally designing phosphors incorporating and combining for the first time a bridge for sigma-conjugation and a moiety for H-bond-directed supramolecular self-assembly. The molecular crystals exhibit room temperature ‘phosphorescence’ quantum yields that reach up to 20% and lifetimes up to 520 ms. This study provides a promising strategy for the development of molecular crystals exhibiting efficient long-lived room temperature persistent luminescence.","PeriodicalId":19672,"journal":{"name":"Organic and Hybrid Light Emitting Materials and Devices XXV","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75142829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reactive interfaces: perovskite degradation at metal-oxide interfaces probed by photoelectron spectroscopy 反应界面:用光电子能谱探测金属-氧化物界面上钙钛矿的降解
Organic and Hybrid Light Emitting Materials and Devices XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2595286
S. Olthof
{"title":"Reactive interfaces: perovskite degradation at metal-oxide interfaces probed by photoelectron spectroscopy","authors":"S. Olthof","doi":"10.1117/12.2595286","DOIUrl":"https://doi.org/10.1117/12.2595286","url":null,"abstract":"In optoelectronic devices, the function and performance depends crucially on the proper alignment of the energy level landscape throughout the device, allowing for efficient charge transport across the various interfaces. \u0000In perovskites it turned out that these interfaces can be rather complex. On the one hand, interface dipoles and band bending occur. But more importantly, the perovskite composition and formation can be significantly influenced by chemical reactions taking place at these interfaces. \u0000In this talk I will summarize our recent work on a variety of metal-oxides in which we use photoelectron spectroscopy to analyze which components are responsible for the strong interface chemistry. For this, we looked at a variety of different perovskites (i.e. organic vs. inorganic ones, I vs. Br, etc.) as well as the individual perovskite precursors. \u0000Overall, I will show how photoelectron spectroscopy measurements can help to probe and understand the processes going on at these vario","PeriodicalId":19672,"journal":{"name":"Organic and Hybrid Light Emitting Materials and Devices XXV","volume":"390 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77482513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Ultrasonic spray coating of gold nanoparticles: A comprehensive study on the surface coverage and position of Au-NPs in the hole injection layer of OLEDs for an optimized luminous efficacy 超声喷涂金纳米粒子:全面研究了金纳米粒子在oled孔注入层中的表面覆盖和位置，以优化其发光效率
Organic and Hybrid Light Emitting Materials and Devices XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2593973
R. S. N. Kumar, Maarten Eerdekens, Naveen K. Reddy, T. Verbiest, W. Deferme
{"title":"Ultrasonic spray coating of gold nanoparticles: A comprehensive study on the surface coverage and position of Au-NPs in the hole injection layer of OLEDs for an optimized luminous efficacy","authors":"R. S. N. Kumar, Maarten Eerdekens, Naveen K. Reddy, T. Verbiest, W. Deferme","doi":"10.1117/12.2593973","DOIUrl":"https://doi.org/10.1117/12.2593973","url":null,"abstract":"OLEDs consisting of Au-NPs sandwiched between anode and hole injection layer, and close to an active layer inside PEDOT:PSS is fabricated by Ultrasonic Spray Coating (USSC). Optimized surface coverage of Au-NPs on ITO facilitates efficient charge injection and an optimized position of the Au-NPs away from the active layer accelerates the radiative recombination. Obtained results indicate that USSC could effortlessly tune the surface coverage and the vertical position of the Au-NPs to enhance the OLED’s efficacy. This paves the way for the fabrication of large area, high efficient OLEDs with USSC.","PeriodicalId":19672,"journal":{"name":"Organic and Hybrid Light Emitting Materials and Devices XXV","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83741543","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient halide-based perovskite optoelectronic devices using conjugated polyelectrolytes 使用共轭聚电解质的高效卤化物钙钛矿光电器件
Organic and Hybrid Light Emitting Materials and Devices XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2594329
M. Song
{"title":"Efficient halide-based perovskite optoelectronic devices using conjugated polyelectrolytes","authors":"M. Song","doi":"10.1117/12.2594329","DOIUrl":"https://doi.org/10.1117/12.2594329","url":null,"abstract":"Halide-based perovskite materials have been spotlighted in light-emitting diodes and perovskite solar cells applications due to their excellent optical and electrical characteristics. In particular, excellent film quality of perovskite with defect passivation is required to obtain highly efficient and stable perovskite optoelectronic devices. However, lots of undesired trap sites by defect sites such as voids, pinholes, grain boundaries and under-coordinated ions in surface of film can be formed in solution-processed perovskite films, reducing the device performance and operational stability of perovskite devices. Here, we demonstrate efficient perovskite optoelectronic devices by incorporating poly(fluorene-phenylene)-based anionic conjugated polyelectrolytes (CPEs).","PeriodicalId":19672,"journal":{"name":"Organic and Hybrid Light Emitting Materials and Devices XXV","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82288452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Molecular additives in perovskite LEDs: From defect passivation to crystallization manipulation 钙钛矿led中的分子添加剂:从缺陷钝化到结晶操作
Organic and Hybrid Light Emitting Materials and Devices XXV Pub Date : 2021-08-01 DOI: 10.1117/12.2594843
F. Gao
{"title":"Molecular additives in perovskite LEDs: From defect passivation to crystallization manipulation","authors":"F. Gao","doi":"10.1117/12.2594843","DOIUrl":"https://doi.org/10.1117/12.2594843","url":null,"abstract":"","PeriodicalId":19672,"journal":{"name":"Organic and Hybrid Light Emitting Materials and Devices XXV","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78344550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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