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Carbon-ZnO alternating quantum dot chains: electrostatic adsorption assembly and white light-emitting device application†
Nanoscale ( IF 5.8 ) Pub Date : 2018-03-23 00:00:00 , DOI: 10.1039/c8nr01209a Kai-Kai Liu 1, 2, 3, 4, 5 , Xiao-Ming Li 6, 7, 8, 9, 10 , Shao-Bo Cheng 11, 12, 13, 14 , Rui Zhou 14, 15, 16, 17 , Ya-Chuan Liang 14, 15, 16, 17 , Lin Dong 14, 15, 16, 17 , Chong-Xin Shan 1, 2, 3, 4, 5 , Hai-Bo Zeng 6, 7, 8, 9, 10 , De-Zhen Shen 1, 2, 3, 4, 5
Nanoscale ( IF 5.8 ) Pub Date : 2018-03-23 00:00:00 , DOI: 10.1039/c8nr01209a Kai-Kai Liu 1, 2, 3, 4, 5 , Xiao-Ming Li 6, 7, 8, 9, 10 , Shao-Bo Cheng 11, 12, 13, 14 , Rui Zhou 14, 15, 16, 17 , Ya-Chuan Liang 14, 15, 16, 17 , Lin Dong 14, 15, 16, 17 , Chong-Xin Shan 1, 2, 3, 4, 5 , Hai-Bo Zeng 6, 7, 8, 9, 10 , De-Zhen Shen 1, 2, 3, 4, 5
Affiliation
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Aggregation-induced quenching (ACQ) in carbon nanodots (CNDs) impede their applications in solid devices. Herein, the concept of alternating quantum dot (QD) chains was proposed to overcome the common issue of fluorescence quenching in CNDs; in this study, CNDs and ZnO QDs were interlinked to form carbon-ZnO alternating quantum dot chains (CZA-QDCs), which overcame the ACQ of CNDs and hence ensured efficient full-spectrum fluorescence for white light-emitting devices (WLEDs) without excessive blue emission. Under the excitation of 365 nm lines, white emission resulting from the combination of blue emission from the CNDs and yellow emission from the ZnO QDs has been achieved from these powders. The quantum efficiency of the CZA-QDC powders can reach 49% and remain stable for two months. By coating the powders onto an ultraviolet chip as phosphors, WLEDs with a luminous efficiency of 20.1 lm W−1, color coordinate of (0.30, 0.35), correlated color temperature of 5205 K, and a color rendering index of 84 have been fabricated. Due to the relatively high abundance and eco-friendly characteristics of both carbon and ZnO, the results reported herein may provide a promising alternative to fluorescent phosphors that are widely used in WLEDs.
中文翻译：
碳-ZnO交替量子点链：静电吸附组件和白色发光器件的应用†
碳纳米点（CND）中的聚集诱导淬灭（ACQ）阻碍了它们在固体设备中的应用。在本文中，提出了交替量子点（QD）链的概念，以克服CND中常见的荧光猝灭问题。在这项研究中，CND和ZnO QD相互连接形成碳-ZnO交替量子点链（CZA-QDC），它克服了CND的ACQ，从而确保了白色发光器件（WLED）的高效全光谱荧光而没有过多蓝色发射。在365 nm线的激发下，已从这些粉末中获得了CND发出的蓝色发射和ZnO QD发出的黄色发射相结合而产生的白色发射。CZA-QDC粉末的量子效率可以达到49％，并可以稳定两个月。通过将粉末作为荧光粉涂覆到紫外线芯片上，-1，色坐标为（0.30，0.35），相关色温为5205 K，显色指数为84。由于碳和ZnO都具有较高的丰度和环保特性，因此本文报道的结果可能为WLED中广泛使用的荧光粉提供有希望的替代方法。
更新日期：2018-03-23
中文翻译：
碳-ZnO交替量子点链：静电吸附组件和白色发光器件的应用†
碳纳米点（CND）中的聚集诱导淬灭（ACQ）阻碍了它们在固体设备中的应用。在本文中，提出了交替量子点（QD）链的概念，以克服CND中常见的荧光猝灭问题。在这项研究中，CND和ZnO QD相互连接形成碳-ZnO交替量子点链（CZA-QDC），它克服了CND的ACQ，从而确保了白色发光器件（WLED）的高效全光谱荧光而没有过多蓝色发射。在365 nm线的激发下，已从这些粉末中获得了CND发出的蓝色发射和ZnO QD发出的黄色发射相结合而产生的白色发射。CZA-QDC粉末的量子效率可以达到49％，并可以稳定两个月。通过将粉末作为荧光粉涂覆到紫外线芯片上，-1，色坐标为（0.30，0.35），相关色温为5205 K，显色指数为84。由于碳和ZnO都具有较高的丰度和环保特性，因此本文报道的结果可能为WLED中广泛使用的荧光粉提供有希望的替代方法。
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