Publications by authors named "Kwan-Woo Ko"
Salicylic Acid-Based Organic Dyes Acting as the Photosensitizer for Solar Cells.
J Nanosci Nanotechnol
May 2016
A D-π-A metal-free organic dye, featuring salicylic acid as a novel acceptor/anchoring unit, has been designed, synthesized and applied to dye-sensitized solar cell. The detailed photophysical, electrochemical, photovoltaic and sensitizing properties of the organic dye were investigated, in addition to the computational studies of the dye and dye-(TiO2)6 system. A solar cell device using this new organic dye as a sensitizer produced a solar to electric power conversion efficiency (PCE) of 3.
View Article and Find Full Text PDFComparative Analysis of Various Photoelectrodes for Dye-Sensitized Solar Cells.
J Nanosci Nanotechnol
November 2015
Article Synopsis
- We developed nanopastes with different additives (acetylene black, 3,5-dinitrosalicylic acid, and SiC2 particles) for making photoelectrodes in dye sensitized solar cells (DSSCs).
- Each nanopaste had unique properties: AB paste had large pore sizes, NSA paste maintained good transparency while improving efficiency, and SO paste had effective particle interconnections and scattering.
- AB paste showed the highest increase in cell efficiency by 9.647%, and we analyzed the pros and cons of each paste for their potential commercial use in DSSCs.
The addition of various amounts of a strong oxidizing agent (3,5-dinitrosalicyclic acid, DNSA) to TiO2 paste enhances the solar-to-electrical-energy conversion efficiency of the corresponding dye-sensitized solar cells (DSSCs). Maximum performance was obtained from a device that was fabricated by using a TiO2 paste with 2 wt % DNSA, which showed a short-circuit current density of 17.88 mA cm(-2) , an open-circuit voltage of 0.
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