| 학회 |
한국고분자학회 |
| 학술대회 |
2008년 가을 (10/09 ~ 10/10, 일산킨텍스) |
| 권호 |
33권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Oligomeric PEG-based co-adsorbent on the TiO2 Nanostructure in the Solid State Dye-Sensitized Solar Cells |
| 초록 |
In solid state dye-sensitized solar cells, electron recombination and pore filling of electrolyte into mesoporous TiO2 layer are important factors in affecting the energy conversion efficiency. Oligomeric PEGs containing COOH group as a co-adsorbent were introduced to reduce the electron recombination rates between TiO2 and triiodide of the polymer electrolyte (PEGDME/MPII/I2/Silica). Open circuit voltage and power conversion efficiency under 1 sun conditions were enhanced from 0.61 to 0.71V and from 4.62 to 5.71%, respectively, with the co-adsorbent concentration of 10 mM. The electron recombination rates were 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 negative shift of the TiO2 conduction band and decreases of the electron recombination rate, resulting in an improved photovoltaic performance. |
| 저자 |
박수일1, 이용건2, 김수진1, 정준혁1, 강용수1
|
| 소속 |
1한양대, 2서울대 |
| 키워드 |
DSSC; co-adsorbent
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| E-Mail |
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