Silver grid transparent conducting electrodes for organic light emitting diodes

F. Laurent M.  Sam; M. Anas  Razali; K.D.G. Imalka  Jayawardena; Christopher A. Mills; Lynn J. Rozanski; Michail J. Beliatis; S. Ravi P. Silva

doi:10.1016/j.orgel.2014.09.036

Silver grid transparent conducting electrodes for organic light emitting diodes

F. Laurent M. Sam, M. Anas Razali, K.D.G. Imalka Jayawardena, Christopher A. Mills, Lynn J. Rozanski, Michail J. Beliatis, S. Ravi P. Silva

University of Surrey

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Polymer organic light emitting diodes (OLEDs) were fabricated using thin silver hexagonal grids replacing indium tin oxide (ITO) as the transparent conducting electrodes (TCE). Previous literature has assumed that thick metal grids (several hundred nanometres thick) with a lower sheet resistance (<10 X/h) and a similar light transmission (>80%) compared to thinner grids would lead to OLEDs with better performance than when thinner metal grid lines are used. This assumption is critically examined using OLEDs on various metal grids with different thicknesses and studying their performances. The experimental results show that a 20 nm thick silver grid TCE resulted in more efficient OLEDs with higher luminance (10 cd/A and 1460 cd/m2 at 6.5 V) than a 111 nm thick silver grid TCE (5 cd/A and 159 cd/m2 at 6.5 V). Furthermore, the 20 nm thick silver grid OLED has a higher luminous efficiency than the ITO OLED (6 cd/A and 1540 cd/m2 at 6.5 V) at low voltages. The data shows that thinner metal grid TCEs (about 20 nm) make the most efficient OLEDs, contrary to previous expectations. © 2014 Elsevier B.V. All rights reserved.

Original language	English
Journal	Organic Electronics
Volume	15
Pages (from-to)	3492–3500
ISSN	1566-1199
DOIs	https://doi.org/10.1016/j.orgel.2014.09.036
Publication status	Published - 2014
Externally published	Yes

Keywords

Metal grids
Transparent conducting electrodes
ITO alternatives
OLEDs

Access to Document

10.1016/j.orgel.2014.09.036

OpenUrl availability

Full text

Cite this

@article{c7034f68caec4c0da6bd564ba1f60c7c,

title = "Silver grid transparent conducting electrodes for organic light emitting diodes",

abstract = "Polymer organic light emitting diodes (OLEDs) were fabricated using thin silver hexagonal grids replacing indium tin oxide (ITO) as the transparent conducting electrodes (TCE). Previous literature has assumed that thick metal grids (several hundred nanometres thick) with a lower sheet resistance (<10 X/h) and a similar light transmission (>80%) compared to thinner grids would lead to OLEDs with better performance than when thinner metal grid lines are used. This assumption is critically examined using OLEDs on various metal grids with different thicknesses and studying their performances. The experimental results show that a 20 nm thick silver grid TCE resulted in more efficient OLEDs with higher luminance (10 cd/A and 1460 cd/m2 at 6.5 V) than a 111 nm thick silver grid TCE (5 cd/A and 159 cd/m2 at 6.5 V). Furthermore, the 20 nm thick silver grid OLED has a higher luminous efficiency than the ITO OLED (6 cd/A and 1540 cd/m2 at 6.5 V) at low voltages. The data shows that thinner metal grid TCEs (about 20 nm) make the most efficient OLEDs, contrary to previous expectations. {\textcopyright} 2014 Elsevier B.V. All rights reserved.",

keywords = "Metal grids, Transparent conducting electrodes, ITO alternatives, OLEDs",

author = "Sam, {F. Laurent M.} and Razali, {M. Anas} and Jayawardena, {K.D.G. Imalka} and Mills, {Christopher A.} and Rozanski, {Lynn J.} and Beliatis, {Michail J.} and Silva, {S. Ravi P.}",

year = "2014",

doi = "10.1016/j.orgel.2014.09.036",

language = "English",

volume = "15",

pages = "3492–3500",

journal = "Organic Electronics",

issn = "1566-1199",

publisher = "Elsevier",

}

TY - JOUR

T1 - Silver grid transparent conducting electrodes for organic light emitting diodes

AU - Sam, F. Laurent M.

AU - Razali, M. Anas

AU - Jayawardena, K.D.G. Imalka

AU - Mills, Christopher A.

AU - Rozanski, Lynn J.

AU - Beliatis, Michail J.

AU - Silva, S. Ravi P.

PY - 2014

Y1 - 2014

N2 - Polymer organic light emitting diodes (OLEDs) were fabricated using thin silver hexagonal grids replacing indium tin oxide (ITO) as the transparent conducting electrodes (TCE). Previous literature has assumed that thick metal grids (several hundred nanometres thick) with a lower sheet resistance (<10 X/h) and a similar light transmission (>80%) compared to thinner grids would lead to OLEDs with better performance than when thinner metal grid lines are used. This assumption is critically examined using OLEDs on various metal grids with different thicknesses and studying their performances. The experimental results show that a 20 nm thick silver grid TCE resulted in more efficient OLEDs with higher luminance (10 cd/A and 1460 cd/m2 at 6.5 V) than a 111 nm thick silver grid TCE (5 cd/A and 159 cd/m2 at 6.5 V). Furthermore, the 20 nm thick silver grid OLED has a higher luminous efficiency than the ITO OLED (6 cd/A and 1540 cd/m2 at 6.5 V) at low voltages. The data shows that thinner metal grid TCEs (about 20 nm) make the most efficient OLEDs, contrary to previous expectations. © 2014 Elsevier B.V. All rights reserved.

AB - Polymer organic light emitting diodes (OLEDs) were fabricated using thin silver hexagonal grids replacing indium tin oxide (ITO) as the transparent conducting electrodes (TCE). Previous literature has assumed that thick metal grids (several hundred nanometres thick) with a lower sheet resistance (<10 X/h) and a similar light transmission (>80%) compared to thinner grids would lead to OLEDs with better performance than when thinner metal grid lines are used. This assumption is critically examined using OLEDs on various metal grids with different thicknesses and studying their performances. The experimental results show that a 20 nm thick silver grid TCE resulted in more efficient OLEDs with higher luminance (10 cd/A and 1460 cd/m2 at 6.5 V) than a 111 nm thick silver grid TCE (5 cd/A and 159 cd/m2 at 6.5 V). Furthermore, the 20 nm thick silver grid OLED has a higher luminous efficiency than the ITO OLED (6 cd/A and 1540 cd/m2 at 6.5 V) at low voltages. The data shows that thinner metal grid TCEs (about 20 nm) make the most efficient OLEDs, contrary to previous expectations. © 2014 Elsevier B.V. All rights reserved.

KW - Metal grids

KW - Transparent conducting electrodes

KW - ITO alternatives

KW - OLEDs

U2 - 10.1016/j.orgel.2014.09.036

DO - 10.1016/j.orgel.2014.09.036

M3 - Journal article

SN - 1566-1199

VL - 15

SP - 3492

EP - 3500

JO - Organic Electronics

JF - Organic Electronics

ER -

Silver grid transparent conducting electrodes for organic light emitting diodes

Abstract

Keywords

Access to Document

OpenUrl availability

Fingerprint

Cite this