Effect of geometric lattice design on optical/electrical properties of transparent silver grid for organic solar cells

Ju Won Lim, Young Tack Lee, Rina Pandey, Tae Hee Yoo, Byoung In Sang, Byeong Kwon Ju, Do Kyung Hwang, Won Kook Choi

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Silver (Ag) grid transparent electrode is one of the most promising transparent conducting electrodes (TCEs) to replace conventional indium tin oxide (ITO). We systematically investigate an effect of geometric lattice modifications on optical and electrical properties of Ag grid electrode. The reference Ag grid with 5 μm width and 100 μm pitch (duty of 0.05) prepared by conventional photo-lithography and lift-off processes shows the sheet resistance of 13.27 Ω/sq, transmittance of 81.1%, and resultant figure of merit (FOM) of 129.05. Three different modified Ag grid electrodes with stripe added-mesh (SAM), triangle-added mesh (TAM), and diagonal-added mesh (DAM) are suggested to improve optical and electrical properties. Although all three of SAM, TAM, and DAM Ag grid electrodes exhibit the lower transmittance values of about 72 - 77%, they showed much decreased sheet resistance of 6 - 8 Ω/sq. As a result, all of the lattice-modified Ag grid electrodes display significant improvement of FOM and the highest value of 171.14 is obtained from DAM Ag grid, which is comparable to that of conventional ITO electrode (175.46). Also, the feasibility of DAM Ag gird electrode for use in organic solar cell is confirmed by finite difference time domain (FDTD) simulations. Unlike a conventional ITO electrode, DAM Ag grid electrode can induce light scattering and trapping due to the diffuse transmission that compensates for the loss in optical transparency, resulting in comparable light absorption in the photo active layer of poly(3-hexylthiophene) (P3HT): [6,6]-phenyl-C61-butyric acid methyl ester (PC60BM). P3HT:PC60BM based OSCs with the DAM Ag grid electrode were fabricated, which also showed the potential for ITO-free transparent electrode.

Original languageEnglish
Pages (from-to)26891-26899
Number of pages9
JournalOptics Express
Volume22
Issue number22
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

solar cells
electrical properties
grids
silver
mesh
electrodes
indium oxides
tin oxides
figure of merit
triangles
transmittance
optical properties
butyric acid
electromagnetic absorption
esters
light scattering
lithography
trapping
conduction

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Effect of geometric lattice design on optical/electrical properties of transparent silver grid for organic solar cells. / Lim, Ju Won; Lee, Young Tack; Pandey, Rina; Yoo, Tae Hee; Sang, Byoung In; Ju, Byeong Kwon; Hwang, Do Kyung; Choi, Won Kook.

In: Optics Express, Vol. 22, No. 22, 01.01.2014, p. 26891-26899.

Research output: Contribution to journalArticle

Lim, Ju Won ; Lee, Young Tack ; Pandey, Rina ; Yoo, Tae Hee ; Sang, Byoung In ; Ju, Byeong Kwon ; Hwang, Do Kyung ; Choi, Won Kook. / Effect of geometric lattice design on optical/electrical properties of transparent silver grid for organic solar cells. In: Optics Express. 2014 ; Vol. 22, No. 22. pp. 26891-26899.
@article{5d765e4a715a4c74b30433180010ab98,
title = "Effect of geometric lattice design on optical/electrical properties of transparent silver grid for organic solar cells",
abstract = "Silver (Ag) grid transparent electrode is one of the most promising transparent conducting electrodes (TCEs) to replace conventional indium tin oxide (ITO). We systematically investigate an effect of geometric lattice modifications on optical and electrical properties of Ag grid electrode. The reference Ag grid with 5 μm width and 100 μm pitch (duty of 0.05) prepared by conventional photo-lithography and lift-off processes shows the sheet resistance of 13.27 Ω/sq, transmittance of 81.1{\%}, and resultant figure of merit (FOM) of 129.05. Three different modified Ag grid electrodes with stripe added-mesh (SAM), triangle-added mesh (TAM), and diagonal-added mesh (DAM) are suggested to improve optical and electrical properties. Although all three of SAM, TAM, and DAM Ag grid electrodes exhibit the lower transmittance values of about 72 - 77{\%}, they showed much decreased sheet resistance of 6 - 8 Ω/sq. As a result, all of the lattice-modified Ag grid electrodes display significant improvement of FOM and the highest value of 171.14 is obtained from DAM Ag grid, which is comparable to that of conventional ITO electrode (175.46). Also, the feasibility of DAM Ag gird electrode for use in organic solar cell is confirmed by finite difference time domain (FDTD) simulations. Unlike a conventional ITO electrode, DAM Ag grid electrode can induce light scattering and trapping due to the diffuse transmission that compensates for the loss in optical transparency, resulting in comparable light absorption in the photo active layer of poly(3-hexylthiophene) (P3HT): [6,6]-phenyl-C61-butyric acid methyl ester (PC60BM). P3HT:PC60BM based OSCs with the DAM Ag grid electrode were fabricated, which also showed the potential for ITO-free transparent electrode.",
author = "Lim, {Ju Won} and Lee, {Young Tack} and Rina Pandey and Yoo, {Tae Hee} and Sang, {Byoung In} and Ju, {Byeong Kwon} and Hwang, {Do Kyung} and Choi, {Won Kook}",
year = "2014",
month = "1",
day = "1",
doi = "10.1364/OE.22.026891",
language = "English",
volume = "22",
pages = "26891--26899",
journal = "Optics Express",
issn = "1094-4087",
publisher = "The Optical Society",
number = "22",

}

TY - JOUR

T1 - Effect of geometric lattice design on optical/electrical properties of transparent silver grid for organic solar cells

AU - Lim, Ju Won

AU - Lee, Young Tack

AU - Pandey, Rina

AU - Yoo, Tae Hee

AU - Sang, Byoung In

AU - Ju, Byeong Kwon

AU - Hwang, Do Kyung

AU - Choi, Won Kook

PY - 2014/1/1

Y1 - 2014/1/1

N2 - Silver (Ag) grid transparent electrode is one of the most promising transparent conducting electrodes (TCEs) to replace conventional indium tin oxide (ITO). We systematically investigate an effect of geometric lattice modifications on optical and electrical properties of Ag grid electrode. The reference Ag grid with 5 μm width and 100 μm pitch (duty of 0.05) prepared by conventional photo-lithography and lift-off processes shows the sheet resistance of 13.27 Ω/sq, transmittance of 81.1%, and resultant figure of merit (FOM) of 129.05. Three different modified Ag grid electrodes with stripe added-mesh (SAM), triangle-added mesh (TAM), and diagonal-added mesh (DAM) are suggested to improve optical and electrical properties. Although all three of SAM, TAM, and DAM Ag grid electrodes exhibit the lower transmittance values of about 72 - 77%, they showed much decreased sheet resistance of 6 - 8 Ω/sq. As a result, all of the lattice-modified Ag grid electrodes display significant improvement of FOM and the highest value of 171.14 is obtained from DAM Ag grid, which is comparable to that of conventional ITO electrode (175.46). Also, the feasibility of DAM Ag gird electrode for use in organic solar cell is confirmed by finite difference time domain (FDTD) simulations. Unlike a conventional ITO electrode, DAM Ag grid electrode can induce light scattering and trapping due to the diffuse transmission that compensates for the loss in optical transparency, resulting in comparable light absorption in the photo active layer of poly(3-hexylthiophene) (P3HT): [6,6]-phenyl-C61-butyric acid methyl ester (PC60BM). P3HT:PC60BM based OSCs with the DAM Ag grid electrode were fabricated, which also showed the potential for ITO-free transparent electrode.

AB - Silver (Ag) grid transparent electrode is one of the most promising transparent conducting electrodes (TCEs) to replace conventional indium tin oxide (ITO). We systematically investigate an effect of geometric lattice modifications on optical and electrical properties of Ag grid electrode. The reference Ag grid with 5 μm width and 100 μm pitch (duty of 0.05) prepared by conventional photo-lithography and lift-off processes shows the sheet resistance of 13.27 Ω/sq, transmittance of 81.1%, and resultant figure of merit (FOM) of 129.05. Three different modified Ag grid electrodes with stripe added-mesh (SAM), triangle-added mesh (TAM), and diagonal-added mesh (DAM) are suggested to improve optical and electrical properties. Although all three of SAM, TAM, and DAM Ag grid electrodes exhibit the lower transmittance values of about 72 - 77%, they showed much decreased sheet resistance of 6 - 8 Ω/sq. As a result, all of the lattice-modified Ag grid electrodes display significant improvement of FOM and the highest value of 171.14 is obtained from DAM Ag grid, which is comparable to that of conventional ITO electrode (175.46). Also, the feasibility of DAM Ag gird electrode for use in organic solar cell is confirmed by finite difference time domain (FDTD) simulations. Unlike a conventional ITO electrode, DAM Ag grid electrode can induce light scattering and trapping due to the diffuse transmission that compensates for the loss in optical transparency, resulting in comparable light absorption in the photo active layer of poly(3-hexylthiophene) (P3HT): [6,6]-phenyl-C61-butyric acid methyl ester (PC60BM). P3HT:PC60BM based OSCs with the DAM Ag grid electrode were fabricated, which also showed the potential for ITO-free transparent electrode.

UR - http://www.scopus.com/inward/record.url?scp=84920020353&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84920020353&partnerID=8YFLogxK

U2 - 10.1364/OE.22.026891

DO - 10.1364/OE.22.026891

M3 - Article

VL - 22

SP - 26891

EP - 26899

JO - Optics Express

JF - Optics Express

SN - 1094-4087

IS - 22

ER -