In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 44, No. 6R ( 2005-06-01), p. 3678-
Abstract:
We developed an active matrix driving organic light-emitting diode (OLED) panel on a glass substrate using two organic thin-film transistors (OTFTs) per pixel, a switching OTFT and a driving OTFT. The OTFTs are bottom contact structures with the high-dielectric constant gate insulator tantalum oxide (Ta 2 O 5 , relative dielectric constant of 23) produced by anodization in ammonium adipate solution and with pentacene as the active layer. The W / L (where W and L are the OTFTs channel width and length, respectively) was 400 µm/10 µm for the switching OTFTs and 680 µm/10 µm for the driving OTFTs. The characteristics of the OTFTs were improved by treating the Ta 2 O 5 surface with hexamethyldisilazane (HMDS), so that the field-effect mobility was 2.0×10 -1 cm 2 V -1 s -1 and the current on/off ratio was 10 5 . A green phosphorescent dopant, tris(2-phenylpyridine)iridium [Ir(ppy) 3 ], was used for the OLED layer. The panel had 8×8 pixels and the aperture ratio was 27%. We confirmed a 16-gray-scale representation and a luminance of 400 cd/m 2 .
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.44.3678
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2005
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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