Extending Anisotropy Dynamics of Light‐Emitting Dipoles as Necessary Condition Toward Developing Highly‐Efficient OLEDs
Adv. Opt. Mater., 11 (2023) 2202477.
https://doi.org/10.1002/adom.202202477
通過抑制主客體庫侖散射，可發現出高能躍遷偶極子仍然在 Ir(ppy)2(acac):exciplex 系統，可保持擴展的各向異性動力學，同時熱電子朝向LUMO能階進行能量釋放。也因此，發光偶極子的平坦行為，最終將使得 Ir(ppy)2(acac):exciplex OLED 呈現出EQE大於 34.01%之良好特性。
By suppressing host–guest Coulomb scattering, the high-energy transition dipoles can still maintain extended anisotropy dynamics in the energy domain in Ir(ppy)2(acac):exciplex system while hot electrons are relaxing toward the lowest unoccupied molecular orbital (LUMO). Consequently, the extended anisotropy dynamics of light-emitting dipoles demonstrate a high EQE of 34.01% in the Ir(ppy)2(acac):exciplex OLED.