Chen Yujuan, Xing Weishuo, Liu Yixuan, Zhang Xinsu, Xie Yangyang, Shen Chongyu, Liu Jay Guoxu, Geng Chong, Xu Shu
Tianjin Key Laboratory of Electronic Materials and Devices, School of Electronics and Information Engineering, Hebei University of Technology, 5340 Xiping Road, Tianjin 300401, China.
SHINEON Co., LTD., Building 3, No. 58 Jinghai Road, BDA, Beijing 100176, China.
Nanomaterials (Basel). 2020 Feb 12;10(2):317. doi: 10.3390/nano10020317.
CdSe/CdS core-shell quantum rods (QRs) are a promising prospect in optoelectronic applications but usually have a relatively low quantum efficiency and stability. Here, we report on an efficient and stable CdSe/CdS/ZnS QRs-in-matrix assembly (QRAs) by growing and embedding CdSe/CdS QRs in ZnS matrices. Structural characterizations show that the CdSe/CdS QRs are encapsulated and interconnected by ZnS in the QRAs structure. The stable ZnS encapsulation renders the CdSe/CdS QRs high quantum efficiency (QE) up to 85%. The QRAs also present high photo- and thermal-stability and can preserve 93% of the initial QE at 100 °C. The QRAs powder presents a light degradation of only 2% under continuous excitation for 100 h, displaying profound potential in optoelectronic applications. White light-emitting diodes (WLEDs) are fabricated by packaging the QRAs powder as phosphor on top of blue GaN chip. The WLED shows high optical performance and light quality.
硒化镉/硫化镉核壳量子棒（QRs）在光电子应用中前景广阔，但通常量子效率和稳定性相对较低。在此，我们报道了一种通过在硫化锌基质中生长并嵌入硒化镉/硫化镉量子棒来制备高效且稳定的硒化镉/硫化镉/硫化锌量子棒在基质中的组装体（QRAs）。结构表征表明，在QRAs结构中，硫化锌包裹并连接着硒化镉/硫化镉量子棒。稳定的硫化锌包裹使硒化镉/硫化镉量子棒具有高达85%的高量子效率（QE）。QRAs还具有高光稳定性和热稳定性，在100℃时可保持初始量子效率的93%。QRAs粉末在连续激发100小时下光降解仅为2%，在光电子应用中显示出巨大潜力。通过将QRAs粉末作为荧光粉封装在蓝色氮化镓芯片顶部来制造白色发光二极管（WLED）。该WLED具有高光学性能和光质量。
