| 학회 |
한국고분자학회 |
| 학술대회 |
2009년 봄 (04/09 ~ 04/10, 대전컨벤션센터) |
| 권호 |
34권 1호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Oligomeric PEG-based Co-adsorbent on the TiO2 Nanostructure in Dye-Sensitized Solar Cells |
| 초록 |
In dye-sensitized solar cells, electron recombination is important factor in affecting the energy conversion efficiency. Oligomeric PEG containing COOH group as a co-adsorbent was introduced to reduce the electron recombination rates between TiO2 and triiodide of the electrolyte (MPII/I2). Open circuit voltage, short circuit current and power conversion efficiency of DSSCs under 1 sun condition were enhanced from 0.72 to 0.74 V, from 11.8 to 16.6 mA/cm2 and from 5.9 to 8.4 % with the co-adsorbent, respectively. The electron recombination rate was characterized using electrochemical impedance spectroscopy (EIS). It is thus concluded that the introduction of the hydrophilic oligomeric co-adsorbent on the TiO2 influences on the TiO2 conduction band shift and decreases of the electron recombination rate, resulting in an improved photovoltaic performance. |
| 저자 |
박수일1, 이용건2, 정준혁1, 전라선1, 강용수1
|
| 소속 |
1한양대, 2서울대 |
| 키워드 |
co-adsorbent; electron recombination; impedance
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| E-Mail |
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