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Ultra‐Bright and Stable Pure Blue Light‐Emitting Diode from O, N Co‐Doped Carbon Dots
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2021-01-15 , DOI: 10.1002/lpor.202000412 Xiao Wang 1 , Yurong Ma 1 , Qingyao Wu 1 , Zhenzhen Wang 1 , Yichen Tao 1 , Yajie Zhao 1 , Bo Wang 1 , Jingjing Cao 1 , Hui Wang 1 , Xiaoqing Gu 1 , Hui Huang 1 , Si Li 2 , Xiaoyong Wang 2 , Fengrui Hu 3 , Mingwang Shao 1 , Liangsheng Liao 1 , Tsun‐Kong Sham 4 , Yang Liu 1 , Zhenhui Kang 1
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2021-01-15 , DOI: 10.1002/lpor.202000412 Xiao Wang 1 , Yurong Ma 1 , Qingyao Wu 1 , Zhenzhen Wang 1 , Yichen Tao 1 , Yajie Zhao 1 , Bo Wang 1 , Jingjing Cao 1 , Hui Wang 1 , Xiaoqing Gu 1 , Hui Huang 1 , Si Li 2 , Xiaoyong Wang 2 , Fengrui Hu 3 , Mingwang Shao 1 , Liangsheng Liao 1 , Tsun‐Kong Sham 4 , Yang Liu 1 , Zhenhui Kang 1
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The pure blue light‐emitting diodes (LEDs) play a key role in the application of solid display and illumination. Most of pure blue LEDs reported so far, are based on semiconductor quantum dots and metal complex, involving heavy metal elements. Here, the fabrication of O, N co‐doped carbon dots (CDs) by a hydrothermal method from perylene‐3,4,9,10‐tetracarboxylic dianhydride and 2,3‐diaminophenazine is shown. These CDs show strong photoluminescence (PL) emission peaked at 447 nm (in ethanol) with absolute PL quantum yields of 88.9%. They are then doped into poly(vinyl carbazole) to form the active emission layer in the pure blue CDs LEDs. The electroluminescence emission of these CDs LEDs is centered at 452 nm with Commission Internationale d'Eclairage (CIE) coordinates of (0.14, 0.10). Moreover, the pure blue CDs LEDs show a high external quantum efficiency of 2.114%, high brightness of 648 cd m–2, long half‐lifetime (T50) of 200 h, and a favorable current efficiency of 2.2 cd A−1. This work opens a new way to develop cost‐effective, environmental‐friendly, and high‐efficient metal‐free pure blue LEDs.
中文翻译：
O，N共掺杂碳点的超明亮，稳定的纯蓝色发光二极管
纯蓝色发光二极管（LED）在固态显示和照明应用中起着关键作用。迄今为止，报告的大多数纯蓝色LED均基于半导体量子点和金属配合物，其中涉及重金属元素。在此展示了通过水热法由per 3,4,9,10-四羧酸二酐和2,3-二氨基吩嗪制备O，N共掺杂碳点（CD）的过程。这些CD表现出在447 nm（在乙醇中）达到峰值的强光致发光（PL）发射，绝对PL量子产率为88.9％。然后将它们掺杂到聚乙烯基咔唑中，以在纯蓝色CD LED中形成有源发射层。这些CD LED的电致发光中心位于452 nm，国际照明委员会（CIE）坐标为（0.14，0.10）。而且，–2，半衰期长（T 50）为200 h，良好的电流效率为2.2 cd A -1。这项工作为开发具有成本效益，环保和高效的无金属纯蓝色LED开辟了一条新途径。
更新日期：2021-03-11
中文翻译：
O，N共掺杂碳点的超明亮，稳定的纯蓝色发光二极管
纯蓝色发光二极管（LED）在固态显示和照明应用中起着关键作用。迄今为止，报告的大多数纯蓝色LED均基于半导体量子点和金属配合物，其中涉及重金属元素。在此展示了通过水热法由per 3,4,9,10-四羧酸二酐和2,3-二氨基吩嗪制备O，N共掺杂碳点（CD）的过程。这些CD表现出在447 nm（在乙醇中）达到峰值的强光致发光（PL）发射，绝对PL量子产率为88.9％。然后将它们掺杂到聚乙烯基咔唑中，以在纯蓝色CD LED中形成有源发射层。这些CD LED的电致发光中心位于452 nm，国际照明委员会（CIE）坐标为（0.14，0.10）。而且，–2，半衰期长（T 50）为200 h，良好的电流效率为2.2 cd A -1。这项工作为开发具有成本效益，环保和高效的无金属纯蓝色LED开辟了一条新途径。
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