Evolution of luminance by voltage in organic light-emitting diodes
We study degradation behaviors of luminance and voltage in organic light-emitting diodes. We find that normalized luminance and inverse normalized voltage with time, L ( t ) and V ( t ) − 1 , follow the stretched exponential decay. On this basis, we derive a general relation of luminance and voltage...
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| Veröffentlicht in: | Applied physics letters 2006-01, Vol.88 (1), p.013503-013503-3 |
|---|---|
| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | We study degradation behaviors of luminance and voltage in organic light-emitting diodes. We find that normalized luminance and inverse normalized voltage with time,
L
(
t
)
and
V
(
t
)
−
1
, follow the stretched exponential decay. On this basis, we derive a general relation of luminance and voltage with time as
L
(
t
)
=
V
(
t
)
−
δ
(
t
)
, where
δ
(
t
)
indicates a decay exponent, which is attributed to time-dependent space-charge limitation. Here the observation of higher
δ
(
t
)
at higher initial luminance explains why luminance decay is faster at higher initial luminance. |
|---|---|
| ISSN: | 0003-6951 1077-3118 |
| DOI: | 10.1063/1.2159563 |