检索结果-南通市图书馆

The Study on the Relationship between Dynamic Balance Energy Distribution and spectral stability with Voltage Change in White Organic Light Emitting Diode

引用

Optics and Photonics Journal 2023年第3期13卷 35-46页

作者： Xinyu Zhu Zhiqi Kou Yanbo Wang Zhixiu Ma College of Science University of Shanghai for Science and Technology Shanghai China

The stable spectrum can be obtained when the voltage changes, which is a necessary condition for the white organic light emitting diode (WOLED) device to be widely used in the field of solid-state lighting. However, with the increase of voltage, the movement of the recombination zone (RZ) is inevitable because the perfect bipolar host material is difficult to obtain, which will redistribute the energy in the light emitting layer (EML) and affect the stability of the spectrum. We fabricate a series of ternary hybrid WOLEDs with a simple structure by inserting ultra-thin PO-T2T into the blue exciplex (TCTA:TPBi) to form the green interface exciplex. Without considering the movement of RZ, device B2 realizes the dynamic balance energy distribution in EML and stable spectrum by controlling two processes of the Dexter energy transfer and exciton capture. By modifying the doping ratio of the host material, we also find that the broadened RZ is helpful to further improve the spectral stability of the device. When the voltage changes from 3 V to 7 V, the change range of color coordinates is only (0.026, 0.025).

关键词： WOLED spectral stability Exciplex Energy Transfer Recombination Zone

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The spectrum and stability of travelling pulses in a coupled FitzHugh-Nagumo equation

引用

Science China Mathematics 2024年第5期67卷 975-1010页

作者： Qi Qiao Xiang Zhang School of Mathematical Sciences Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Scientific and Engineering Computing(Ministry of Education) and Shanghai Frontier Science Center of Modern Analysis(CMA-Shanghai)Shanghai Jiao Tong UniversityShanghai 200240China

For a coupled slow-fast FitzHugh-Nagumo(FHN)equation derived from a reaction-diffusionmechanics(RDM)model,Holzer et al.(2013)studied the existence and stability of the travelling pulse,which consists of two fast orbit arcs and two slow ones,where one fast segment passes the unique fold point with algebraic decreasing and two slow ones follow normally hyperbolic critical curve *** and Zhang(2021)obtained the existence of the travelling pulse,whose two fast orbit arcs both exponentially decrease,and one of the slow orbit arcs could be normally hyperbolic or not at the ***,we characterize both the nonlinear and spectral stability of this travelling pulse.

关键词： coupled FitzHugh-Nagumo equation singular perturbation travelling pulse spectrum nonlinear stability spectral stability

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A dual-blue light-emitting diode based on strain-compensated InGaN-AlGaN/GaN quantum wells

引用

Chinese Physics B 2013年第2期22卷 357-360页

作者：严启荣闫其昂石培培牛巧利李述体章勇 Laboratory of Nanophotonic Functional Materials and Devices Institute of Optoelectronic Materials and TechnologySouth China Normal University

A strain-compensated InGaN quantum well（QW） active region employing a tensile AlGaN barrier is *** spectral stability and efficiency droop for a dual-blue light-emitting diode（LED） are improved compared with those of the conventional InGaN/GaN QW dual-blue LEDs based on a stacking structure of two In0.18Ga0.82N/GaN QWs and two In0.12Ga0.88N/GaN QWs on the same sapphire *** is found that the optimal performance is achieved when the Al composition of the strain-compensated AlGaN layer is 0.12 in blue QW and 0.21 in blue-violet *** improvement performance can be attributed to the strain-compensated InGaN-AlGaN/GaN QW,which can provide a better carrier confinement and effectively reduce leakage current.

关键词： InGaN-AlGaN/GaN quantum well InGaN/GaN quantum well spectral stability dual-blue lightemitting diode

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Influences of Color Spaces on Printing Defect Classification

Influences of Color Spaces on Printing Defect Classification

引用

2009中国控制与决策会议

作者： Xie Yong~(1,2),Wang Yaonan~1,Peng Tao~2 1.College of Electrical and Information Engineering,Hunan University,Changsha,410007,China 2.College of Packaging and Printing,Hunan University of Technology,Zhuzhou,412008,China

＜正＞This paper aims at exploring how spectral variation of illumination influences the classification accuracy of print defects in different color spaces,when the color camera is unable to adapt to varying *** variation is achieved through simulated transformation of correlated color temperature of illumination of the test images. The percentile features are used to detect the possible defective areas on printing matter *** are demonstrated that the original RGB color space is the best color space under varying illumination,the XYZ and CIELuv spaces being also very *** interesting observation is that features from some of the color spaces perform worse than features obtained from grey-level images.

关键词： Illumination Color Spaces spectral stability Printing Defect Inspection

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：