当前位置：
X-MOL 学术
›
Adv. Opt. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Spectrally Stable Pure Red CsPbI3 Quantum Dots Light-Emitting Diodes via Effective Low Temperature Gradient Centrifugation Separation and Surface Modification
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2023-05-17 , DOI: 10.1002/adom.202300306 Wei Shen 1 , Zhan Su 1 , Shuo Chen 1 , Yujun Dai 1 , Yue Qiu 1 , Yanfeng Chen 1 , Jiayu Jiang 1 , Jianbin Zhang 1 , Yun Wang 1 , Hao Cui 1 , Yanxing He 1 , Kun Cao 1 , Bo Cai 1 , Lihui Liu 1 , Shufen Chen 1
Advanced Optical Materials ( IF 8.0 ) Pub Date : 2023-05-17 , DOI: 10.1002/adom.202300306 Wei Shen 1 , Zhan Su 1 , Shuo Chen 1 , Yujun Dai 1 , Yue Qiu 1 , Yanfeng Chen 1 , Jiayu Jiang 1 , Jianbin Zhang 1 , Yun Wang 1 , Hao Cui 1 , Yanxing He 1 , Kun Cao 1 , Bo Cai 1 , Lihui Liu 1 , Shufen Chen 1
Affiliation
|
Development of high-performance and stable pure red perovskite light-emitting devices (LEDs) promotes commercialization of perovskite. Benefiting from the quantum confinement effect, pure red CsPbI3 quantum dots (QDs) can avoid the color drift issue for mixed halide systems. Herein, a facile temperature-dependent hot-injection method combined with low temperature gradient centrifugation is employed to prepare 5.60 ± 0.05 nm pure red QDs. The QDs exhibit 642 nm photoluminescence (PL) with 37 nm full width at half maximum, and their Commission Internationale de l'Eclairage (CIE) coordinates located at (0.708, 0.292) match well with standard pure red for Rec. 2020. The PL half-lifetime for pure red QDs solution is 210 days under ambient conditions, and both the X and Y coordinates of CIE only fluctuate within (0.002, 0.002). Finally, a simple NH4I post-treatment to decrease ligand length further boosts the QDs conductivity, and the pure red LED exhibits 9.4% maximum external quantum efficiency. The electroluminescence spectra exhibits a sharp peak at 645 nm, and their CIE coordinates are located at (0.707, 0.290). Furthermore, the pure red LED exhibits both good working and color stability. Its half-lifetime is 25.1 min and color drifts are only (0.002, 0.002) after 30.0 min of continuous working at 60 cd m−2 with a constant current density of 3.5 mA cm−2.
中文翻译：
通过有效的低温梯度离心分离和表面修饰制备光谱稳定的纯红色 CsPbI3 量子点发光二极管
高性能、稳定的纯红色钙钛矿发光器件（LED）的开发促进了钙钛矿的商业化。受益于量子限域效应，纯红CsPbI 3量子点 (QD) 可以避免混合卤化物系统的颜色漂移问题。在此，采用简便的温度依赖性热注射方法结合低温梯度离心来制备5.60±0.05 nm纯红色量子点。QD 表现出 642 nm 光致发光 (PL)，半峰全宽为 37 nm，其国际照明委员会 (CIE) 坐标位于 (0.708, 0.292)，与 Rec 的标准纯红色匹配良好。2020年。纯红色量子点溶液的PL半衰期在环境条件下为210天，CIE的X和Y坐标仅在(0.002,0.002)内波动。最后，简单的NH 4减少配体长度的后处理进一步提高了量子点的电导率，纯红色 LED 表现出 9.4% 的最大外部量子效率。电致发光光谱在645 nm处呈现尖峰，其CIE坐标位于(0.707,0.290)。此外，纯红色 LED 具有良好的工作稳定性和颜色稳定性。其半衰期为25.1分钟，在60 cd m -2 、3.5 mA cm -2恒定电流密度下连续工作30.0分钟后，颜色漂移仅为(0.002, 0.002) 。
更新日期：2023-05-17
中文翻译：
通过有效的低温梯度离心分离和表面修饰制备光谱稳定的纯红色 CsPbI3 量子点发光二极管
高性能、稳定的纯红色钙钛矿发光器件（LED）的开发促进了钙钛矿的商业化。受益于量子限域效应，纯红CsPbI 3量子点 (QD) 可以避免混合卤化物系统的颜色漂移问题。在此，采用简便的温度依赖性热注射方法结合低温梯度离心来制备5.60±0.05 nm纯红色量子点。QD 表现出 642 nm 光致发光 (PL)，半峰全宽为 37 nm，其国际照明委员会 (CIE) 坐标位于 (0.708, 0.292)，与 Rec 的标准纯红色匹配良好。2020年。纯红色量子点溶液的PL半衰期在环境条件下为210天，CIE的X和Y坐标仅在(0.002,0.002)内波动。最后，简单的NH 4减少配体长度的后处理进一步提高了量子点的电导率，纯红色 LED 表现出 9.4% 的最大外部量子效率。电致发光光谱在645 nm处呈现尖峰，其CIE坐标位于(0.707,0.290)。此外，纯红色 LED 具有良好的工作稳定性和颜色稳定性。其半衰期为25.1分钟，在60 cd m -2 、3.5 mA cm -2恒定电流密度下连续工作30.0分钟后，颜色漂移仅为(0.002, 0.002) 。
京公网安备 11010802027423号