Organic Photonics + Electronics最新文献_第4页

High-efficiency and stable blue hyperfluorescence organic light-emitting diode 高效稳定的蓝色高荧光有机发光二极管

Organic Photonics + Electronics Pub Date : 2022-10-03 DOI: 10.1117/12.2632333

Chin-Yiu Chan, Yi‐Ting Lee, Youichi Tsuchiya, H. Nakanotani, C. Adachi

{"title":"High-efficiency and stable blue hyperfluorescence organic light-emitting diode","authors":"Chin-Yiu Chan, Yi‐Ting Lee, Youichi Tsuchiya, H. Nakanotani, C. Adachi","doi":"10.1117/12.2632333","DOIUrl":"https://doi.org/10.1117/12.2632333","url":null,"abstract":"Organic light-emitting diodes (OLEDs) are a promising light-emitting technology useful for various display applications1,2. Despite great progress in this field3-12, there is an ongoing challenge to realize high performance blue OLEDs with efficiency, good color purity, and device lifetime. Here, we report pure-blue (CIEx,y color coordinates of [0.13, 0.16]) OLEDs with high-efficiency (external quantum efficiency of 32 % at 1000 cd m–2 ), narrow-emission (full width half maximum of 19 nm), and good stability (LT95 of 18 hours at an initial luminance of 1000 cd m–2 ). The design is based on a two-unit stacked tandem hyperfluorescence (HF)-OLED with an improved singlet-excited energy transfer process from a sky-blue TADF assistant dopant (AD) (HDT-1) to a pure-blue terminal emitter (TE) (v-DABNA). Furthermore, the effect of dopant concentration of terminal emitter on the device performance of hyperfluorescence OLEDs is studied. Device shows a better color purity when dopant concentration is increased. On the other hand, new hyperfluorescence OLEDs have been fabricated, in which device stability has been extended with a new molecular design of TE.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123183263","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

Mycobacterium tuberculosis detection and genotyping using molecular probe-based biosensor 基于分子探针生物传感器的结核分枝杆菌检测及基因分型

Organic Photonics + Electronics Pub Date : 2022-10-03 DOI: 10.1117/12.2634320

M. Berezovskaya, D. Gorbenko

引用次数: 0

Completely printed flexible carbon nanotube based transistor using poly-vinyl alcohol (PVA) as gate dielectric via aerosol jet printing 以聚乙烯醇(PVA)为栅极介质，采用气溶胶喷射打印技术完全打印出柔性碳纳米管晶体管

Organic Photonics + Electronics Pub Date : 2022-10-03 DOI: 10.1117/12.2633716

B. Mishra, C. Howlader, Yihong Chen

引用次数: 1

Photorefractive effect of smectic liquid crystals and their application to laser ultrasonic remote sensing 近晶液晶的光折变效应及其在激光超声遥感中的应用

Organic Photonics + Electronics Pub Date : 2022-10-03 DOI: 10.1117/12.2633374

T. Sasaki, Takaaki Yagami, Toshinobu Takashi, Kai Suzuki, Gouta Ikeda, Y. Ishii, K. Le, Y. Naka

引用次数: 0

On the modeling of organic electrochemical transistors 有机电化学晶体管的建模研究

Organic Photonics + Electronics Pub Date : 2022-10-03 DOI: 10.1117/12.2633291

Lukas M. Bongartz, Matteo Cucchi, K. Leo, H. Kleemann

{"title":"On the modeling of organic electrochemical transistors","authors":"Lukas M. Bongartz, Matteo Cucchi, K. Leo, H. Kleemann","doi":"10.1117/12.2633291","DOIUrl":"https://doi.org/10.1117/12.2633291","url":null,"abstract":"Due to their synaptic functionality based on interacting electronic and ionic charge carriers, organic electrochemical transistors (OECTs) appeal as highly attractive candidates for a new generation of organic neuromorphic devices. Despite their acknowledged application potential, little is still known about the underlying physics and traditional transistor models fail to accurately describe the phenomena observed. This deficiency comes in part from the fact that such models are largely based on an electrostatic approach for metal-oxide-semiconductor field-effect transistors (MOSFETs), which is a very strong abstraction to the volumetric and complex processes in OECTs. On the other hand, material studies reveal the potential of an alternative approach, taking into account the electrochemical processes by means of thermodynamics and thus considering the OECTs intricacy. These two approaches oppose each other in explaining OECTs, neither of which can claim a comprehensive explanation of the transistor on its own so far. A unification of the two sides, on the other hand, could come much closer to a substantial explanation and provide a more accurate picture of reality. After giving a short overview of the most significant concepts of the two explanatory directions, a framework is presented that might come very close to this merger, as it accurately reproduces essential transfer properties of OECTs in terms of thermodynamics for the first time.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"176 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121044487","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

Influence of some smectic liquid crystals’ retardation switching behavior on beam steering performance 某些近晶液晶的延迟开关特性对光束转向性能的影响

Organic Photonics + Electronics Pub Date : 2022-10-03 DOI: 10.1117/12.2632870

A. Mochizuki

引用次数: 0

The role of OLED emissive layer polarization in sub-turn-on charge accumulation OLED发射层极化在亚导通电荷积累中的作用

Organic Photonics + Electronics Pub Date : 2022-10-03 DOI: 10.1117/12.2633591

E. Pakhomenko, R. Holmes

引用次数: 2

Stable colloidal suspension of graphene oxide liquid crystals: optical characteristics and electro-optic switching for sample 氧化石墨烯液晶稳定胶体悬浮液:光学特性及样品电光开关

Organic Photonics + Electronics Pub Date : 2022-10-03 DOI: 10.1117/12.2646205

S. Shahini, Michel Meylender, Tom Menei, S. Campidelli, G. Scalia

{"title":"Stable colloidal suspension of graphene oxide liquid crystals: optical characteristics and electro-optic switching for sample","authors":"S. Shahini, Michel Meylender, Tom Menei, S. Campidelli, G. Scalia","doi":"10.1117/12.2646205","DOIUrl":"https://doi.org/10.1117/12.2646205","url":null,"abstract":"Graphene oxide liquid crystal has very interesting optical and electro-optic properties. In fact, reorientation occurs already at few volts per millimeter and the disk-like graphene oxide flakes, typically suspended in water, can form liquid crystal phases at very low concentration due to the large aspect ratio of the flakes. The liquid crystal formation depends on the flake size, their concentration but also on the magnitude of the repulsive and attractive inter-flakes forces. However, the spatial confinement has relevance too on the macroscopic alignment and even in inducing birefringence as visible in filaments and in more confining configurations. Unlike graphene, graphene oxide has a very small light absorption in the visible, in some regions actually negligible. However, even if the colloidal characteristics are preserved and there is still birefringence, the optical characteristic can change due to near-UV exposure, resulting in an increase of optical absorption. This has the consequence that the imaginary part has to be included in the general refractive index expression and in the optical transmission evaluation. Stability is an important aspect for graphene oxide suspensions either for changes in the optical characteristics or the destabilization of the suspension due to partial or total reduction leading to the formation of reduced graphene oxide, but also for the isotropic – nematic phase separation occurring for concentrations in the bi-phase region. All these aspects are very relevant also for electro-optic applications. It will be shown here that some issues can be solved and improved if the chosen phase is the nematic phase.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"819 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126817821","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

Hybrid color conversion control using OLED and perovskite emitters 使用OLED和钙钛矿发射器的混合颜色转换控制

Organic Photonics + Electronics Pub Date : 2022-10-03 DOI: 10.1117/12.2632662

Hyukmin Kwon, Seokwoo Kang, Sunwoo Park, Seyoung Oh, Jongwook Park

{"title":"Hybrid color conversion control using OLED and perovskite emitters","authors":"Hyukmin Kwon, Seokwoo Kang, Sunwoo Park, Seyoung Oh, Jongwook Park","doi":"10.1117/12.2632662","DOIUrl":"https://doi.org/10.1117/12.2632662","url":null,"abstract":"Perovskites is a very promising material that is being extensively studied at the bulk and nanosize scales because it has outstanding optical properties, including high quantum efficiency and narrow emission spectra. To realize a full-color display in the research field of perovskites or perovskite-structured quantum dots (PeQDs), the development of white-light-emitting devices that operate by emitting light of three primary colors (red, green, and blue) has emerged as an active research topic. In this presentation, we report for the first time three-color white-light emission with high brightness from white-emitting PeQD organic light-emitting diodes (WPeQD-OLEDs) fabricated using a PeQD material and organic emitters. The electroluminescence (EL) spectra of the WPeQD-OLEDs showed EL maximum peaks at 460, 527, and 640 nm; the CIE color coordinates of the emitted light were (0.33, 0.40). The EL results confirmed that the maximum luminance was 49,000 cd m−2 and the maximum luminance efficiency and power efficiency were 4.48 cd A−1 and 2.16 lm W−1 . Also, we achieved a new hybrid pink device of perovskite red QD (PRQD) and organic blue emitter (OBE) which have different emission mechanisms in bilayered LED devices. It has pink emission, CIE coordinate of (0.331, 0.204) which cannot be provided by a single emitter.","PeriodicalId":145218,"journal":{"name":"Organic Photonics + Electronics","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114205571","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

Performance comparison of continuous optical beam steering approaches 连续光束转向方法的性能比较

Organic Photonics + Electronics Pub Date : 2022-10-03 DOI: 10.1117/12.2633673

Brandon Vreeland, A. V. Van Rynbach, D. Bryant, P. Bos

引用次数: 0