Proceedings of the Korean Vacuum Society Conference (한국진공학회:학술대회논문집)

The Korean Vacuum Society (한국진공학회)
권호 표지

Characteristics of ITO/Ag-Pd-Cu/ITO Multilayer Electrodes for High Efficiency Organic Solar Cells

  • Kim, Hyo-Jung (Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University) ;
  • Kang, Sin-Bi (Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University) ;
  • Na, Seok-In (Professional Graduate School of Flexible and Printable Electronics, Polymer Materials Fusion Research Center, Chonbuk National University) ;
  • Kim, Han-Ki (Department of Advanced Materials Engineering for Information and Electronics, Kyung Hee University)
  • Published : 2014.02.10
Download PDF
⟨ Previous Next ⟩

Abstract

We investigated characteristics of ITO/Ag-Pd-Cu (APC)/ITO multilayer electrodes prepared by direct current magnetron sputtering for use as an anode in organic solar cells (OSCs). To optimize electrical properties of ITO/APC/ITO multilayer, we fabricated the ITO/APC/ITO multilayer at a fixed ITO thickness of 30 nm as a function of APC thickness. Compare to the surface of Ag layer on ITO, the APC had a smooth surface morphology. At optimized APC thickness of 12 nm, the ITO/APC/ITO multilayer exhibited a sheet resistance of $6{\Omega}/square$ and optical transmittance of 84.15% at a wavelength of 550 nm which is comparable to conventional ITO/Ag/ITO multilayer. However, the APC-based ITO multilayer showed a higher average transmittance in a visible region than the Ag-based ITO multilayer. The higher average transmittance of ITO/APC/ITO multilayer indicated the multilayer is suitable anode for organic solar cells with P3HT:PCBM active layer. OSCs fabricated on the optimized ITO/ACP/ITO multilayer exhibited a better performance with a fill factor of 64.815%, a short circuit current of $8.107mA/cm^2$, an open circuit voltage of 0.59 V, and power conversion efficiency (3.101%) than OSC with ITO/Ag/ITO multilayer (2.8%).

Keywords