TY - JOUR
T1 - Spiro derivatives as electron-blocking materials for highly stable OLEDs
AU - Hu, Baohua
AU - Ci, Zhenhua
AU - Liang, Li
AU - Li, Chong
AU - Huang, Wei
AU - Ichikawa, Musubu
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/11
Y1 - 2020/11
N2 - In this study, we introduced N-([1,1′-biphenyl]-2-yl)-N-(9,9-dimethyl-9H-fluoren-2-yl) spiro[dibenzo[a,d] [7]annulene-5,9′-fluoren]-2′-amine (BFS2A) and N-([1,1′-biphenyl] -2-yl)-N-(9,9-dimethyl-9H-fluoren-2-yl)spiro[dibenzo[a,d][7]annulene-5,9′-fluoren]-3-amine (BFS3A) as electron-blocking materials in organic light-emitting diodes (OLEDs). We verified that these materials have suitable optical properties as well as good electrochemical and thermal stability. Devices based on these materials also exhibited excellent charge balance, which corresponded to good device lifetime. Although BFS2A and BFS3A have similar molecular structures, OLEDs with these compounds as electron-blocking materials exhibited different performance, which we attributed to the differences in the modifying positions of the spiro backbone.
AB - In this study, we introduced N-([1,1′-biphenyl]-2-yl)-N-(9,9-dimethyl-9H-fluoren-2-yl) spiro[dibenzo[a,d] [7]annulene-5,9′-fluoren]-2′-amine (BFS2A) and N-([1,1′-biphenyl] -2-yl)-N-(9,9-dimethyl-9H-fluoren-2-yl)spiro[dibenzo[a,d][7]annulene-5,9′-fluoren]-3-amine (BFS3A) as electron-blocking materials in organic light-emitting diodes (OLEDs). We verified that these materials have suitable optical properties as well as good electrochemical and thermal stability. Devices based on these materials also exhibited excellent charge balance, which corresponded to good device lifetime. Although BFS2A and BFS3A have similar molecular structures, OLEDs with these compounds as electron-blocking materials exhibited different performance, which we attributed to the differences in the modifying positions of the spiro backbone.
KW - Charge balance
KW - Electroluminescent properties
KW - Electron-blocking
KW - Lifetime
KW - Organic light-emitting diodes
UR - http://www.scopus.com/inward/record.url?scp=85089348181&partnerID=8YFLogxK
U2 - 10.1016/j.orgel.2020.105879
DO - 10.1016/j.orgel.2020.105879
M3 - 文章
AN - SCOPUS:85089348181
SN - 1566-1199
VL - 86
JO - Organic Electronics
JF - Organic Electronics
M1 - 105879
ER -