Stable and Efficient Near-Infrared Organic Light-Emitting Diodes Employing a Platinum(II) Porphyrin Complex
Not provided.
Materials Science↗
Engineering topics
Zhu, Zhi-Qiang
Publications and source records attributed to Zhu, Zhi-Qiang.
Stable and efficient blue and green organic light emitting diodes employing tetradentate Pt(II) complexes
PtON1-tBu and PtON6-tBu-doped blue organic light-emitting diodes (OLEDs) demonstrated estimated operational lifetimes LT 70 of 174 and 380 h at an initial luminance of 1000 cd/cm 2 with CIE coordinates of (0.188, 0.256) and (0.197, 0.309), respectively. Modifying the molecular structure of the lumiphore resulted in a PtON12-tBu-based green OLED, which realized an estimated operational lifetime LT 70 of 1410 h at an initial luminance of 1000 cd/cm 2 with CIE coordinates of (0.281, 0.559). These studies demonstrate that the tetradentate Pt(II) complexes bearing phenyl-pyrazole or benzopyrazole can act as stable phosphorescent emitters for the development of efficient and stable blue and green OLEDs.
42 ENGINEERING↗
Novel Carbazole/Fluorene-Based Host Material for Stable and Efficient Phosphorescent OLEDs
Not provided.
Materials Science↗
Stable and efficient sky-blue organic light emitting diodes employing a tetradentate platinum complex
A tetradentate Pt(II) complex platinum (II) [10-(9-(4-tert-butylpyridin-2-yl-κN)-9H-carbazol-2-yl-κC 1 )-9,10-dihydro-9,9-dimethyl-3-(1H-pyrazol-1-yl-κN 2 )acridine-1-yl-κC 1 ] (PtN'1N-tBu) incorporating pyrazolyl-acridine as the lumophore was demonstrated to act as a stable and efficient sky-blue emitter. Phosphorescent organic light-emitting diode (OLED) employing PtN'1N-tBu without the electron blocking layer (EBL) achieved a high external quantum efficiency (EQE) of 15.9% and an estimated operational lifetime LT70 of 635 h at an initial luminance of 1000 cd/cm2. The device efficiency could be further improved by adding TrisPCz as EBL, reaching EQE of 17.3% and operational lifetime up to 482 h at 1000 cd/cm2.
36 MATERIALS SCIENCE↗