Forming high transmittance GaSnO/Ag/GaSnO conducting electrodes for optoelectronic devices

Jong Ho Kim, Jin Woo Cho, Su Kyung Kim, Jae Ho Kim, Sun Kyung Kim, Tae Yeon Seong

Research output: Contribution to journalArticlepeer-review

Abstract

We report on the development of high-performance transparent conducting GaSnO (GTO)/Ag/GTO multilayer electrodes for display applications. The optical and electrical characteristics of the GTO/Ag/GTO multilayers were investigated as functions of GTO layer (dGTO) and Ag layer (dAg) thicknesses. With increasing dGTO from 10 to 50 nm, the sheet resistance slightly increased from 3.83 to 4.81 Ω/sq, the carrier concentration decreased from 4.76 × 1022 to 1.12 × 1022 cm−3, and the mobility (μ) slightly changed from 10.7 to 10.3 cm2/V. The 40 nm-thick GTO-based multilayer exhibited the mean transmittance (Tav) of 91.6% and had the Haacke's figure of merit (FOM) of 87.84 × 10−3 Ω−1. The μ value increased from 7.97 to 11.67 cm2/V and sheet resistance varied from 7.81 to 3.47 Ω/sq as increasing dAg from 9 to 15 nm. The Tav of the GTO (40 nm)/Ag/GTO (40 nm) samples decreased from 94.5% to 84.9% with increasing dAg. The optical bandgaps of the GTO and GTO/Ag/GTO (40 nm/12 nm/40 nm) films were estimated to be 4.06 and 3.94 eV, respectively. Finite-difference time-domain calculations were conducted to explain the dAg and dGTO dependent transmittance of the GTO/Ag/GTO samples. With the phasor analyses, the dGTO dependence of the transmittance of GTO/Ag (12 nm)/GTO multilayers is described and discussed. Furthermore, the optical and electrical features of the optimal GTO/Ag/GTO (40 nm/12 nm/40 nm) electrode are compared with those of sputter-deposited 92 nm-thick indium tin oxide (ITO) films.

Original languageEnglish
Pages (from-to)28165-28172
Number of pages8
JournalCeramics International
Volume46
Issue number18
DOIs
Publication statusPublished - 2020 Dec 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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