TY - JOUR
T1 - Designing Highly Efficient Phosphorescent Neutral Tetrahedral Manganese(II) Complexes for Organic Light-Emitting Diodes
AU - Qin, Yanyan
AU - Tao, Peng
AU - Gao, Long
AU - She, Pengfei
AU - Liu, Shujuan
AU - Li, Xiangling
AU - Li, Feiyang
AU - Wang, Hua
AU - Zhao, Qiang
AU - Miao, Yanqin
AU - Huang, Wei
N1 - Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2019/1/18
Y1 - 2019/1/18
N2 - Phosphorescent transition-metal complexes have played the vital role in the rapid development of organic light-emitting diodes (OLEDs) as the most promising candidates for next-generation flat-panel display and solid-state lighting techniques. In this work, novel and low-cost phosphorescent neutral tetrahedral manganese(II) complexes (DBFDPO-MnX2, X = Br, or Cl) based on dibenzofuran-based phosphine oxide derivative as ligand are designed and synthesized. The manganese(II) complexes exhibit intense green phosphorescence with high photoluminescence quantum yields (PLQYs) of as high as 81.4% (DBFDPO-MnBr2). Using complex DBFDPO-MnBr2 as dopant, a green OLED with current efficiency (CEmax) of 35.47 cd A−1, power efficiency (PEmax) of 34.35 lm W−1, and external quantum efficiency (EQEmax) of 10.49% is fabricated. Interestingly, red exciplex emission is also observed in electroluminescence, arising from the interaction between the host materials (bis(2-(2-hydroxyphenyl)-pyridine)beryllium (Bepp2) or 1,3,5-tris(2-N-phenylbenzimidazolyl)benzene (TPBi)) and the dopant (DBFDPO-MnBr2). The exciplex-based red OLED in this study exhibits the maximum CE and PE reaching 18.64 cd A−1 and 17.92 lm W−1, respectively, which are among the up-to-date highest values for exciplex-based red OLEDs. Beneficial from the exciplex, it has the great potential to broaden the electroluminescent spectra with manganese(II) complex.
AB - Phosphorescent transition-metal complexes have played the vital role in the rapid development of organic light-emitting diodes (OLEDs) as the most promising candidates for next-generation flat-panel display and solid-state lighting techniques. In this work, novel and low-cost phosphorescent neutral tetrahedral manganese(II) complexes (DBFDPO-MnX2, X = Br, or Cl) based on dibenzofuran-based phosphine oxide derivative as ligand are designed and synthesized. The manganese(II) complexes exhibit intense green phosphorescence with high photoluminescence quantum yields (PLQYs) of as high as 81.4% (DBFDPO-MnBr2). Using complex DBFDPO-MnBr2 as dopant, a green OLED with current efficiency (CEmax) of 35.47 cd A−1, power efficiency (PEmax) of 34.35 lm W−1, and external quantum efficiency (EQEmax) of 10.49% is fabricated. Interestingly, red exciplex emission is also observed in electroluminescence, arising from the interaction between the host materials (bis(2-(2-hydroxyphenyl)-pyridine)beryllium (Bepp2) or 1,3,5-tris(2-N-phenylbenzimidazolyl)benzene (TPBi)) and the dopant (DBFDPO-MnBr2). The exciplex-based red OLED in this study exhibits the maximum CE and PE reaching 18.64 cd A−1 and 17.92 lm W−1, respectively, which are among the up-to-date highest values for exciplex-based red OLEDs. Beneficial from the exciplex, it has the great potential to broaden the electroluminescent spectra with manganese(II) complex.
KW - exciplex emission
KW - manganese(II) complexes
KW - organic light-emitting diodes
KW - phosphorescence
UR - https://www.scopus.com/pages/publications/85056099057
U2 - 10.1002/adom.201801160
DO - 10.1002/adom.201801160
M3 - 文章
AN - SCOPUS:85056099057
SN - 2195-1071
VL - 7
JO - Advanced Optical Materials
JF - Advanced Optical Materials
IS - 2
M1 - 1801160
ER -