论文标题
明亮且可调色的单层Perovskite宿主宾客光发光发射电化学细胞
Bright and Color-Tunable Single Layer Perovskite Host-Ionic Guest Light Emitting Electrochemical Cells
论文作者
论文摘要
钙钛矿发光设备对其有利的光电特性引起了极大的关注。高载体的迁移率使钙钛矿成为电致发光设备中的宿主材料。为了在简单的单层设备中实现高性能，我们采用了CSPBBR3钙钛矿宿主和新型的离子虹膜络合物来宾以及聚电解质，以展示有效的发光发射电化学细胞（PELECS）。对于最佳的来宾/主机混合物，在4.1 V处实现11.6 cd/a和9.04 lm/w的10600 cd/m2亮度。这些设备显示出从橙红色到绿色的电压依赖性电致发光颜色，由可重新配置的离子材料搅拌促进。优化的设备在恒定电流驾驶下表现出稳定的操作，保持> 630 CD/M2的发射40小时。我们以最佳浓度的宿主浓度产生有效的（> 90％）的福特能量传递和改善高性能PELEC操作的薄膜形态的宿主浓度（> 90％），由离子迁移到界面启用了高性能PELEC操作的薄膜形态
Perovskite light emitting devices have drawn considerable attention for their favorable optoelectronic properties. High carrier mobilities make perovskites excellent candidates as host materials in electroluminescent devices. To achieve high performance in a simple single layer device, we employed a CsPbBr3 perovskite host and a novel ionic iridium complex guest along with a polyelectrolyte to demonstrate efficient light emitting electrochemical cells (PeLECs). For an optimal guest/host blend, 10600 cd/m2 luminance at 11.6 cd/A and 9.04 Lm/W are achieved at 4.1 V. These devices showed voltage-dependent electroluminescence color proceeding from orange-red to green, facilitated by the reconfigurable ionic materials blend. Optimized devices exhibited stable operation under constant current driving, maintaining >630 cd/m2 emission for 40 h. Our rationally-designed ionic guest at an optimal concentration of the host produced efficient (>90%) Forster energy transfer and improved thin film morphological for high performance PeLEC operation enabled by ionic migration to interfaces
