ITO-free inverted organic solar cells fabricated with transparent and low resistance ZnO/Ag/ZnO multilayer electrode

Jun Ho Kim, Tae Woon Kang, Seok In Na, Young Zo Yoo, Tae Yeon Seong

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Inverted organic solar cells (OSCs) based on poly (3-hexylthiophene) (P3HT):[6,6]-phenyl-C61 butyric acid methyl ester (PCBM) bulk heterojunctions (BHJ) were fabricated with optimized ZnO/Ag/ZnO multilayer and conventional indium-tin oxide (ITO) cathode electrodes and their performance was compared. The ZnO/Ag/ZnO multilayer films showed sheet resistances in the range 3.6-3.9 Ω/sq, while ITO exhibited 14.2 Ω/sq. On the one hand, the carrier concentration gradually decreased from 1.74 × 1022 to 4.33 × 1021 cm-3 as the ZnO thickness increased from 8 to 80 nm, respectively. The transmittance of the ZnO(40 nm)/Ag(19 nm)/ZnO(40 nm) films was ∼95% at 550 nm, which is comparable to that of ITO (∼96%). The multilayer films were smooth with a root mean square (RMS) roughness of 0.81 nm. OSCs fabricated with the ZnO(40 nm)/Ag(19 nm)/ZnO(40 nm) film showed a power conversion efficiency (2.63%) comparable to that of OSCs with a conventional ITO cathode (2.71%).

Original languageEnglish
Pages (from-to)829-832
Number of pages4
JournalCurrent Applied Physics
Volume15
Issue number7
DOIs
Publication statusPublished - 2015 Mar 5

Fingerprint

low resistance
Tin oxides
indium oxides
Indium
tin oxides
Multilayers
solar cells
Electrodes
electrodes
Multilayer films
Cathodes
cathodes
Butyric acid
butyric acid
Sheet resistance
Conversion efficiency
Carrier concentration
Heterojunctions
heterojunctions
esters

Keywords

  • Ag
  • Multilayer
  • Organic solar cell
  • Transparent conducting electrode
  • ZnO

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

ITO-free inverted organic solar cells fabricated with transparent and low resistance ZnO/Ag/ZnO multilayer electrode. / Kim, Jun Ho; Kang, Tae Woon; Na, Seok In; Yoo, Young Zo; Seong, Tae Yeon.

In: Current Applied Physics, Vol. 15, No. 7, 05.03.2015, p. 829-832.

Research output: Contribution to journalArticle

Kim, Jun Ho ; Kang, Tae Woon ; Na, Seok In ; Yoo, Young Zo ; Seong, Tae Yeon. / ITO-free inverted organic solar cells fabricated with transparent and low resistance ZnO/Ag/ZnO multilayer electrode. In: Current Applied Physics. 2015 ; Vol. 15, No. 7. pp. 829-832.
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