Surface modification of porous nanocrystalline TiO{sub 2} films for dye-sensitized solar cell application by various gas plasmas

Journal Article · Sun Jul 15 04:00:00 EDT 2007 · Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films

DOI:https://doi.org/10.1116/1.2742392· OSTI ID:20979480

Kim, Youngsoo; Yoon, Chang-Ho; Kim, Kang-Jin; Lee, Yeonhee ^[1]

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1. Advanced Analysis Center, Korea Institute of Science and Technology, Seoul, 136-791, Korea and Department of Chemistry, Korea University, 5-Ka, Anam-dong, Sungbuk-ku, Seoul, 136-701 (Korea, Republic of)

Titanium dioxide (TiO{sub 2}) film for dye-sensitized solar cells (DSSCs) has surface defects such as oxygen vacancies created during the annealing process. The authors used a plasma treatment technique to reduce defects on TiO{sub 2} surfaces. They investigated the influence of different gas plasma treatments of TiO{sub 2} film on the photoelectric performance of DSSC. Short-circuit photocurrent density (J{sub sc}), open-circuit photovoltage (V{sub oc}), and the amount of adsorbed dye for DSSCs were measured. As a result, the solar-to-electricity conversion efficiencies of the O{sub 2}- and N{sub 2}-treated cells increased by 15%-20% compared to untreated cells. On the other hand, solar energy conversion efficiency of CF{sub 4}-plasma treated cells decreased drastically. The increased amount of adsorbed dye on the TiO{sub 2} film was measured by time-of-flight secondary ion mass spectrometry. TiO{sub 2} surfaces modified by plasma treatment were characterized using analytical instruments such as x-ray photoelectron spectroscopy and near-edge x-ray absorption fine structure.

• OSTI ID: 20979480
• Journal Information: Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films, Journal Name: Journal of Vacuum Science and Technology. A, International Journal Devoted to Vacuum, Surfaces, and Films Journal Issue: 4 Vol. 25; ISSN 1553-1813
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTROSCOPY
ANNEALING
CARBON TETRAFLUORIDE
CRYSTALS
DYES
MASS SPECTRA
MASS SPECTROSCOPY
PHOTOCONDUCTIVITY
PLASMA
POROUS MATERIALS
SEMICONDUCTOR MATERIALS
SOLAR CELLS
SOLAR ENERGY CONVERSION
SURFACES
THIN FILMS
TIME-OF-FLIGHT METHOD
TITANIUM OXIDES
VACANCIES
X-RAY PHOTOELECTRON SPECTROSCOPY
X-RAY SPECTROSCOPY