半固態電解質應用於奈米氧化鋅染料敏化太陽能電池之製作

Fabrication of quasi-solid state electrolyte applied to dye-sensitized solar cell with nano ZnO photoelectrode

莊明傑(Ming-Jie Juang)

國立虎尾科技大學/電機資訊學院/光電與材料科技研究所/碩士(2007年)

摘要

本研究利用氧化鋅奈米粒子製作染料敏化電池之光電極，氧化鋅光電極之製作方法為用乙醇溶解奈米粒子粉末，利用旋轉塗佈(spin-coating)方式塗佈在ITO上，經400℃退火30分鐘接著基板浸泡入Eosin Y的乙醇溶液約1小時後，將基板與另一片事先鍍上白金的對向電極以spacer隔開，用燕尾夾固定，注入調製好加熱的液態電解質，基板降至室溫後，電解質即凝固成為膠態，即完成染料敏化太陽能電池之製作。
我們以SEM觀察奈米粒子層的外表型態，XRD分析光電極的成分與晶格結構，以AFM量測光電極之表面型態；元件製作完成後，量測其I-V特性曲線。本實驗工作探討改變二氧化鈦緩衝層上的ZnO奈米粒子層厚度對太陽電池特性的影響，並比較在氧化鋅奈米粒子層上塗佈一層Nb2O5的效果。

並列摘要

In this study, ZnO nano-particles were employed in the photoelectrodes of dye-sensitized solar cells. For preparing the photoelectrodes, a colloidal solution was obtained by mixing ZnO powders with ethanol and stirring the resulting suspension overnight. The suspension was applied onto the conducting substrates and the films were then allowed to dry in air. The ZnO films were sintered shortly after deposition at 400oC for 30 min. The substrate was dipping into a ethanolic 0.32 mM Eosin Y solution for 1 hour and then assembled with platinized conducting glass electrodes. The electrodes were spaced with Surlyn 1706 films from DuPont and sealed up by heating. The internal space was filled with the electrolyte solution heated to 80 oC and after cooling down to room temperature, a uniform motionless polymer gel layer was formed in the cells.
We analysed the morphology of ZnO nano-particle film by SEM and AFM. XRD was used to characterize the composition and crystal structure of the photoelectrodes. Voc and Jsc of the DSSC were measured under AM1.5 illumination. In this study, we changed the thickness of ZnO film upon the TiO2 buffer layer to find the dependence of film thickness vs DSSC performance. For comparison, we also deposited a Nb2O5 thin layer on the ZnO nano-particle films and tested their properties.

參考文獻

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