A spiro-configured ambipolar host material for impressively efficient single-layer green electrophosphorescent devices.
A spiro-configured bipolar molecule (CSC) that possesses high triplet energy, suitable energy levels, and balanced ambipolar carrier mobilities was successfully applied as an efficient host material, compatible with various iridium-based green phosphors, to realize highly efficient single-layer PhOLEDs of a maximum external quantum efficiency up to 8.3% (31.4 cd A(-1)) at a practical brightness of 1000 cd m(-2) (8 V).
Hung
Wen-Yi
WY
Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung 202. wenhung@mail.ntou.edu.tw
Wang
Ting-Chih
TC
Chiu
Hao-Chih
HC
Chen
Hsiao-Fan
HF
Wong
Ken-Tsung
KT