{"title":"外部电流控制动态显示集成上转换微盘与功率密度相关的颜色到近红外发光二极管†","authors":"Zhipeng Meng, Suli Wu and Shufen Zhang","doi":"10.1039/C8TC05087B","DOIUrl":null,"url":null,"abstract":"An externally controlled color-tunable light-emitting device is always the frontier of color display. However, multiple colors are usually realized using different materials with variable composition, phase or structure. Developing materials, which can emit tunable colors on changing external stimuli in a fixed composition, will avoid the energy loss by mixing different materials emitting a single color. Here, we designed a core–shell upconversion micro-disk structure with high concentration of Yb3+ doped in the core. Fine-tuning color output is achieved by varying the power density of the excitation light within a range of 0.8–12.9 W cm−2, which is lower than most of the reported ones and can be realized by commercial NIR-LED. Importantly, we designed a dynamic display device by integrating the micro-disks in a series of NIR-LEDs. For the first time, the dynamic red, orange, yellow and green colors can be demonstrated by simply changing the external current. A red shape of a standing human and a green shape of human with walking step can be dynamically realized in a LED array by varying the external current.","PeriodicalId":84,"journal":{"name":"Journal of Materials Chemistry C","volume":null,"pages":null},"PeriodicalIF":5.7000,"publicationDate":"2018-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1039/C8TC05087B","citationCount":"11","resultStr":"{\"title\":\"External current-controlled dynamic display by integrating upconversion micro-disks with power density-dependent color into NIR luminescent diodes†\",\"authors\":\"Zhipeng Meng, Suli Wu and Shufen Zhang\",\"doi\":\"10.1039/C8TC05087B\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"An externally controlled color-tunable light-emitting device is always the frontier of color display. However, multiple colors are usually realized using different materials with variable composition, phase or structure. Developing materials, which can emit tunable colors on changing external stimuli in a fixed composition, will avoid the energy loss by mixing different materials emitting a single color. Here, we designed a core–shell upconversion micro-disk structure with high concentration of Yb3+ doped in the core. Fine-tuning color output is achieved by varying the power density of the excitation light within a range of 0.8–12.9 W cm−2, which is lower than most of the reported ones and can be realized by commercial NIR-LED. Importantly, we designed a dynamic display device by integrating the micro-disks in a series of NIR-LEDs. For the first time, the dynamic red, orange, yellow and green colors can be demonstrated by simply changing the external current. A red shape of a standing human and a green shape of human with walking step can be dynamically realized in a LED array by varying the external current.\",\"PeriodicalId\":84,\"journal\":{\"name\":\"Journal of Materials Chemistry C\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.7000,\"publicationDate\":\"2018-11-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1039/C8TC05087B\",\"citationCount\":\"11\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Materials Chemistry C\",\"FirstCategoryId\":\"1\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2018/tc/c8tc05087b\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Chemistry C","FirstCategoryId":"1","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2018/tc/c8tc05087b","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 11
摘要
外部可调色发光器件一直是彩色显示研究的前沿。然而,多种颜色通常是使用不同的材料来实现的,这些材料具有不同的成分、相或结构。正在开发的材料可以在固定的成分中随外部刺激的变化而发出可调谐的颜色,通过混合不同的材料发出单一的颜色来避免能量损失。在这里,我们设计了一个核壳上转换的微盘结构,在核中掺杂高浓度的Yb3+。通过改变激发光的功率密度在0.8-12.9 W cm?2,这比大多数报道的低,可以通过商用NIR-LED实现。重要的是,我们设计了一个动态显示装置,将微磁盘集成在一系列nir - led中。第一次,动态的红、橙、黄、绿颜色可以通过简单地改变外部电流来展示。通过改变外部电流,可以在LED阵列中动态实现红色的站立人形和绿色的行走人形。
External current-controlled dynamic display by integrating upconversion micro-disks with power density-dependent color into NIR luminescent diodes†
An externally controlled color-tunable light-emitting device is always the frontier of color display. However, multiple colors are usually realized using different materials with variable composition, phase or structure. Developing materials, which can emit tunable colors on changing external stimuli in a fixed composition, will avoid the energy loss by mixing different materials emitting a single color. Here, we designed a core–shell upconversion micro-disk structure with high concentration of Yb3+ doped in the core. Fine-tuning color output is achieved by varying the power density of the excitation light within a range of 0.8–12.9 W cm−2, which is lower than most of the reported ones and can be realized by commercial NIR-LED. Importantly, we designed a dynamic display device by integrating the micro-disks in a series of NIR-LEDs. For the first time, the dynamic red, orange, yellow and green colors can be demonstrated by simply changing the external current. A red shape of a standing human and a green shape of human with walking step can be dynamically realized in a LED array by varying the external current.
期刊介绍:
The Journal of Materials Chemistry is divided into three distinct sections, A, B, and C, each catering to specific applications of the materials under study:
Journal of Materials Chemistry A focuses primarily on materials intended for applications in energy and sustainability.
Journal of Materials Chemistry B specializes in materials designed for applications in biology and medicine.
Journal of Materials Chemistry C is dedicated to materials suitable for applications in optical, magnetic, and electronic devices.
Example topic areas within the scope of Journal of Materials Chemistry C are listed below. This list is neither exhaustive nor exclusive.
Bioelectronics
Conductors
Detectors
Dielectrics
Displays
Ferroelectrics
Lasers
LEDs
Lighting
Liquid crystals
Memory
Metamaterials
Multiferroics
Photonics
Photovoltaics
Semiconductors
Sensors
Single molecule conductors
Spintronics
Superconductors
Thermoelectrics
Topological insulators
Transistors