Mesh-shaped nanopatterning of Pt counter electrodes for dye-sensitized solar cells with enhanced light harvesting

Dong Jun Kim, Jong Kwan Koh, Chang Soo Lee, Jong Hak Kim

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

A facile process to produce large-area platinum (Pt) counter electrode platforms with well-arrayed, mesh-shaped nanopatterns using commercially available TiO2 paste and poly(dimethyl siloxane) (PDMS) nanostamps is presented. The process involves mesh-shaped (200 nm x 200 nm) nanopatterning of a TiO2 scaffold onto a fluorine-doped tin oxide (FTO) substrate, followed by Pt sputtering. The structure and morphology of the counter electrodes are characterized by a field emission scanning electron microscope (FE-SEM) and an atomic force microscope (AFM). Solid-state dye-sensitized solar cells (ssDSSCs) fabricated with these mesh-shaped Pt counter electrodes showed an efficiency of 7.0%. This is one of the highest efficiencies observed for N719 dye and is much higher than that of devices with non-patterned, thermally deposited electrodes (5.4%) or non-patterned, sputtering deposited electrodes (5.7%). This improvement is attributed to enhanced light harvesting and a greater surface area and has been confirmed by incident photon-to current efficiency (IPCE), electrochemical impedance spectroscopy (EIS), and cyclic voltammetry (CV) measurements.

Original languageEnglish
Article number1400414
JournalAdvanced Energy Materials
Volume4
Issue number18
DOIs
Publication statusPublished - 2014 Dec 1

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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