| 摘要: | 染料敏化太陽能電池(Dye-Sensitized Solar Cell, DSC)具有製作過程簡易、成本低、室內光源發電效率佳等優點，是非常有應用潛力的新世代光伏電池技術。本研究針對實驗室所開發的五種釕金屬錯合物染料HBC-23、DUY-28、DUY-29、HBC-30、及HBC-31和四種有機染料BTI-4、BTI-17、BTI-19、與BTI-21進行元件組裝條件的優化，探討其光電轉換效率及影響光伏行為的參數。在光電極的部分由調整TiO2膜的厚度及TiCl4後處理次數來提高染料吸附量與修補TiO2缺陷；染料溶液則利用添加Chenodeoxycholic acid (CDCA)與染料分子進行共吸附降低染料分子的聚集與填補裸露的TiO2表面；電解液是藉著改變組成(LiI、BMII、GuSCN 、tBP)與濃度，來調整TiO2導電帶能階與提高TiO2表面覆蓋度；對電極則貼上一層鋁箔紙做為光反射層。在HBC-31敏化的元件，其TiO2光電極由一次後處理增加為二次後處理，Jsc值由13.04 mA/cm2提高至14.57 mA/cm2，且在對電極貼上一層鋁箔紙做為光反射層，Jsc進一步提升至16.97 mA/cm2，元件效率達7.19%。HBC-23、DUY-28、DUY-29和HBC-30敏化之元件光電轉換效率分別為8.62%、7.89%、7.31和6.46%。BTI-4敏化之元件優化過後的短路電流密度(Jsc)達21.20 mA/cm2最高光電轉換效率為4.65%，BTI-17、BTI-19和BTI-21光電轉換效率分別為4.56%、0.65%和3.49%。;Dye-sensitized solar cells (DSCs) are the new-generation photovoltaic technologies, which have the advantages such as easy fabrication, low cost and high power conversion efficiency (PCE) under weak light or indoor lighting. In this study, we optimized the device fabrication conditions for five ruthenium complexes sensitizers (HBC-23, DUY-28, DUY-29, HBC-30 and HBC-31) and four organic dyes (BTI-4, BTI-17, BTI-19 and BTI-21) prepared in our Lab. The power conversion efficiency and the parameters affecting the photovoltaic performance of the DSCs ssenisitzed by metal complex and organic dyes were investigated. The dye loading increases and the defects of the photoelectrode reduced by adjusting the thickness and the number of TiCl4 post-treatments of the TiO2 films. Chenodeoxycholic acid (CDCA) was used as a co-adsorbent for decreasing the dye aggregation and mending the uncovered TiO2 surface. The components (LiI, BMII, GuSCN, tBP, I2) and concentration of the electrolyte were used to adjust the energy level of the TiO2 conduction band and protect the surface of TiO2 film. The back of the DSC cell is covered with an aluminum foil as the light reflection layer. The Jsc of thecell sensitized by HBC-31 increased from 13.04 mA/cm2 to 14.57 mA/cm2 by increasing the number of TiO2 post-treatment with TiCl4 form once to two times. When an aluminum foil was pasted to the counter electrode as the light reflection layer, the Jsc of the cell further increases to 16.97 mA/cm2 to reach the PCE of 7.19%. The PEC of HBC-23, DUY-28, DUY-29 and HBC-31 based devices are 8.62%, 7.89%, 7.31 and 6.46%, respectively. The Jsc of BTI-4 is 21.20 mA/cm2 and the highest PCE is 4.65%. The PCE of BTI-17, BTI-19, and BTI-21 sensitized cells are 4.56%, 0.65%, and 3.49%, respectively. |
