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An electrode pattern design methodology that improves the current uniformity in mesa-structured GaN/InGaN blue light-emitting diodes (LEDs) is investigated. Comparisons between an LED with a new electrode pattern adopting the proposed methodology and an LED with a commercially used electrode are made in view of both current and luminance distributions. Simulations as well as experimental results show that the proposed simple design methodology is very effective to spread current more uniformly in the active layer.
References
-
-
1)
-
V. Adivarahan ,
S. Wu ,
H. Sun ,
V. Mandavilli ,
M.S. Shataloy ,
G. Simin ,
J.W. Yang ,
H.P. Maruska ,
M. Asif Khan
.
High-power deep ultraviolet light-emitting diodes based on a micro-pixel design.
Appl. Phys. Lett.
,
1838 -
1840
-
2)
-
S.M. Hwang ,
J.I. Shim
.
A method for current spreading analysis and electrode pattern design in light-emitting diodes.
IEEE Electron Devices
,
5 ,
1123 -
1128
-
3)
-
H.S. Kim ,
J.M. Lee ,
C. Huh ,
S.W. Kim ,
D.J. Kim ,
S.J. Park ,
H.S. Hwang
.
Modeling of a GaN-based light-emitting diode for uniform current spreading.
Appl. Phys. Lett.
,
1903 -
1904
-
4)
-
X. Guo ,
E.F. Schubert
.
Current crowding and optical saturation effects in GaInN/GaN light-emitting diodes grown on insulating substrates.
Appl. Phys. Lett.
,
3337 -
3339
-
5)
-
H.S. Kim ,
S.J. Park ,
H.S. Hwang
.
Lateral current transport path, a model for GaN-based light-emitting diodes: applications to practical device designs.
Appl. Phys. Lett.
,
1326 -
1327
-
6)
-
X. Guo ,
E.F. Schubert
.
Current crowding in GaN/InGaN light emitting diodes on insulating substrates.
J. Appl. Phys.
,
8 ,
4191 -
4195
-
7)
-
H.S. Kim ,
J.H. Cho ,
J.W. Lee ,
S.H. Yoon ,
H.K. Kim ,
C.S. Sone ,
Y.J. Park
.
Measurements of current spreading length and design of GaN-based light emitting diodes.
Appl. Phys. Lett.
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2009.0803
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content/journals/10.1049/el.2009.0803
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