| Autor: |
Reddy KSK; Department of Chemistry , National Chung Hsing University , Taichung 402 , Taiwan., Liu YC; Department of Chemical Engineering , National Tsing Hua University , Hsinchu 300 , Taiwan., Chou HH; Department of Chemistry , National Chung Hsing University , Taichung 402 , Taiwan., Kala K; Department of Chemical Engineering , National Tsing Hua University , Hsinchu 300 , Taiwan., Wei TC; Department of Chemical Engineering , National Tsing Hua University , Hsinchu 300 , Taiwan., Yeh CY; Department of Chemistry , National Chung Hsing University , Taichung 402 , Taiwan.; Research Center for Sustainable Energy and Nanotechnology (RCSEN) and Innovation and Development Center of Sustainable Agriculture (IDCSA) , National Chung Hsing University , Taichung 402 , Taiwan. |
| Abstrakt: |
In this work, we have synthesized a novel porphyrin dye named SK7, which contains two N, N-diarylamino moieties at two β-positions as electron-donating units and one carboxy phenylethynyl moiety at the meso-position as an electron-withdrawing, anchoring group. This novel dye was tested for the application in dye-sensitized solar cells. The light-harvesting behavior of SK7 and YD2 was investigated using UV-vis absorption and density functional calculation. The electron transport properties at the TiO 2 /dye/electrolyte interface for SK7- and YD2-based devices were evaluated by electrochemical impedance spectroscopy. X-ray crystallographic characterization was conducted to understand the influence of two N, N-diarylamino units at two β-positions. The power conversion efficiencies of ca. 6.54% under 1 sun illumination (AM 1.5G) and ca. 19.72% under a T5 light source were noted for the SK7 dye. The performance of SK7 is comparable to that of dye YD2, which contains only one N, N-diarylamino moiety at the meso-position (ca. 7.78 and 20.00% under 1 sun and T5 light, respectively). |
