Efficient Pyrazolo[5,4-f]quinoxaline Functionalized Os(II) Based Emitter with an Electroluminescence Peak Maximum at 811 nm

Authors：Zhu, Ze-Lin; Wang, Sheng-Fu; Fu, Li-Wen; Tan, Ji-Hua; Cao, Chen; Yuan, Yi; Yiu, Shek-Man; Zhang, Ye-Xin; Chi, Yun^*; Lee, Chun-Sing^*

Source：Chemistry - A European Journal, 2022, 28(4).

DOI：10.1002/chem.202103202

• 800 nm
• near-infrared
• organic light-emitting diodes
• osmium(II) complex
• pyrazolo[5
• 4-f]quinoxaline

Upon fusing the pyrazinyl pyrazole entity in giving pyrazolo[3,4-f]quinoxaline chelate, the corresponding Os(II) based NIR emitter exhibited "invisible" and efficient electroluminescence with a peak maximum at 811 nm. A maximum external quantum efficiency of 0.97 % and a suppressed efficiency roll-off till a current density of 300 mA cm(-2) was also exhibited.

• Institution
  y; 清华大学