Pyridinium molten salts as co-adsorbents in dye-sensitized solar cells

Journal Article · Sat Jan 15 00:00:00 EST 2011 · Solar Energy

DOI:https://doi.org/10.1016/J.SOLENER.2010.10.009· OSTI ID:21401380

Chang, Jui-Cheng; Sun, I-Wen ^[1]; Yang, Cheng-Hsien; Yang, Hao-Hsun; Hsueh, Mao-Lin ^[2]; Ho, Wen-Yueh ^[3]; Chang, Jia-Yaw ^[4]

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1. Department of Chemistry, National Cheng Kung University, Tainan 701 (China)
2. Nano-Powder and Thin Film Technology Center, ITRI South, Tainan 709 (China)
3. Institute of Cosmetic Science, Chia Nan University of Pharmacy and Science, Tainan 717 (China)
4. Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106 (China)

The influence of using pyridinium molten salts as co-adsorbents to modify the monolayer of a TiO{sub 2} semiconductor on the performance of a dye-sensitized solar cell is studied. The current-voltage characteristics are measured under AM 1.5 (100 mW cm{sup -2}). The pyridinium molten salts significantly enhance the open-circuit photovoltage (V{sub oc}), the short circuit photocurrent density (J{sub sc}) as well as the solar energy conversion efficiency ({eta}). 1-Ethyl-3-carboxypyridinium iodide ([ECP][I]) is applied successfully to prepare an insulating molecular layer with N719, and achieve high energy conversion efficiency as high as 4.49% at 100 mW cm{sup -2} and AM 1.5. The resulting efficiency is 20% higher than that of a non-additive device. This enhancement of conversion efficiency is attributed to the negative shift of the conduction band (CB) edge and the abundant concentration of I{sup -} on the surface of the electrode when using [ECP][I] as the co-adsorbent. (author)

• OSTI ID: 21401380
• Journal Information: Solar Energy, Vol. 85, Issue 1; Other Information: Elsevier Ltd. All rights reserved; ISSN 0038-092X
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
SOLAR CELLS
SOLAR ENERGY CONVERSION
MOLTEN SALTS
ADSORBENTS
DYES
EFFICIENCY
IODINE IONS
TITANIUM OXIDES
ELECTRIC CONDUCTIVITY
CURRENT DENSITY
LAYERS
ELECTRIC POTENTIAL
ADDITIVES
PHOTOCURRENTS
ELECTRODES
PERFORMANCE
SURFACES
ORGANIC IODINE COMPOUNDS
PYRIDINES
Dye-sensitized solar cells
Co-adsorbents