In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 40, No. 11R ( 2001-11-01), p. 6630-
Abstract:
We demonstrate efficient organic electroluminescent devices with multiple well structure and a p-doped hole injection and transport layer (HTL). The multiple well structure improves the efficiency and the controlled p-doped HTL leads to a lower operating voltage. An amorphous starburst [4,4 ′ ,4 ′′ -tris(N,N-diphenylamino)triphenylamine] doped with a strong organic acceptor, tetrafluoro-tetracyano-quinodimethane serves as the HTL material, a spiro-linked compound, 2,2 ′ ,7 ′ ,7 ′ -tetra-kis-(diphenylamine)-9,9 ′ -spirobifluorene as an interlayer to provide a favorable interface and as a barrier within the multiple well structure and 8-tris-hydroxyquinoline as an emitter and well. The double-well device exhibits low operating voltage, less than 4 V, for obtaining 100 cd/m 2 and the highest current efficiency exceeding 5 cd/A. Changes in the spectra due to the different well structures are also discussed.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.40.6630
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2001
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
Bookmarklink