Spiro derivatives as electron-blocking materials for highly stable OLEDs
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 material...
Saved in:
Published in | Organic electronics Vol. 86; p. 105879 |
---|---|
Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.11.2020
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | 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.
[Display omitted]
•BFS2A and BFS3A as electron-blocking materials were introduced in organic light-emitting diodes (OLEDs).•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. |
---|---|
ISSN: | 1566-1199 1878-5530 |
DOI: | 10.1016/j.orgel.2020.105879 |