Highly efficient quasi-solid-state dye-sensitized solar cells using polyethylene oxide (PEO) and poly(methyl methacrylate) (PMMA)-based printable electrolytes
Venkatesan, S (Venkatesan, Shanmuganathan) ; Liu, IP (Liu, I. -Ping) ; Lin, JC (Lin, Jian-Ci) ; Tsai, MH (Tsai, Ming-Hsiang); Teng, HS (Teng, Hsisheng) ; Lee, YL (Lee, Yuh-Lang)
In this study, highly efficient printable electrolytes (PEs) were prepared for a quasi-solid-state dye-sensitized solar cell (QS-DSSC). A liquid electrolyte based on iodide/triiodide redox couples and 3-methoxypropionitrile (MPN) was utilized to prepare the PEs. Poly(ethylene oxide) (PEO) and poly(methyl methacrylate) (PMMA) were employed as solidifying agents to optimize the properties of the PEs. Moreover, TiO2 nanofillers (NFs) were added to the PEs to enhance the performance of the DSSCs. The results indicate that a PE based on a PEO/PMMA ratio of 7/3 was optimal for efficient printing. The energy conversion efficiency of the DSSC achieved by using this PE was 8.48%, which was higher than the efficiencies of the cell using only PEO PE (7.63%) and liquid-cells (8.32%). This was mainly due to the increase in the electrolyte conductivity and charge transfer resistance at the photoelectrode/electrolyte interface of the DSSC. The presence of 10 wt% TiO2 NFs in the PEs increased the efficiency of the QS-DSSC to 9.12%. The sub-module cell fabricated by using the PE with TiO2 NFs achieved an efficiency of 6.78%. The PE based DSSC exhibited stable long-term efficiency during thermal aging at 60oC.
以聚乙二醇(PEO)與聚甲基丙烯酸甲酯(PMMA)為基底的印刷型電解質在高效率擬固態染料敏化太陽能電池之使用
本研究中,高效能印刷型電解質將應用於擬固態染料敏化太陽能電池。印刷型電解質是以含有碘離子/三碘離子氧化還原對與3-甲氧基丙腈作為溶劑的液態電解質來製備,其中聚乙二醇(PEO)和聚甲基丙烯酸甲酯(PMMA)作為固化劑以調控印刷型電解質之特性;此外,二氧化鈦奈米粒子亦作為電解質填充劑來提升電池之效能。實驗結果指出,以7/3的PEO/PMMA比例所配製的電解質可呈現最佳的印刷效果,而且使用此印刷型電解質的染敏電池具有8.48%的光電轉換效率,此效能表現優於僅以PEO作為固化劑的擬固態電池(7.63%)與一般的液態元件(8.32%)。以上結果主要是因電解質導電度之提升與電池中位於光電極/電解質界面的電荷轉移阻力增加所造成。另外,在印刷型電解質中添加10 wt.%的二氧化鈦填充劑可進一步提升擬固態電池之效率至9.12%,而使用此電解質之次模組電池元件亦具有6.78%之轉換效率。使用印刷型電解質的染敏電池在60oC熱衰減測試中具有長時間穩定之效能表現。