摘要或動機

本實驗以吸附染料之二氧化鈦奈米結構電極層為承載基材的太陽能電池為研究對象，旨在增進其光電轉換效率，促使染料有效地吸收光能後造成電荷分離，再經由二氧化鈦傳導帶向外傳出而形成電流，即所謂染料敏化太陽能電池。實驗主軸共分三：1、合成染料N3：觀察吸附度與浸泡時間之關係，發現在18~20 小時電池有最佳吸附；改變電解液濃度，求得最佳電解液濃度範圍；酸化二氧化鈦極板。2、天然植物色素：改變溶劑，得出高極性之丙酮對電池最佳；酸、鹼化植物色素；觀察電池隨著光照時間增加，性質趨於穩定。3、混合色素與染料：此實驗旨在印證不同吸能範圍之染料在極板混合浸泡後，電池吸能帶是否有疊加、擴充的效果，並觀察分開浸泡與混合色素一起浸泡之不同效應，量測IPCE 以玆比較。實驗結果可知，確實對於電池吸光範圍有所增加，且分開浸泡之效果較好。This experiment is mainly about the phtosensitization of Ti02 solar cell, aiming at improving the energy conversion efficiency, promoting the electric charge to separate from TiO2 and spread out through after the dye absorbs light. That is so-called dye-sensitized solar cell. The experiment mainly divides into three parts: 1. Ruthenium(II): Observing the connection between adsorption and dipped-time, find out that solar cell has best to adsorb in 18 to 20 hours; change the concentration of electrolyte; acidification TiO2. 2. Photosynthetic pigments: Change solvent, and get the conclusion that pigment has better adsorption in high polar solvents such as acetone; acidification/basification pigments; observe the changing of energy conversion efficiency while the illumination time increases. 3. Mixed the dye and pigment: This experiment is aim at proofing that the absorption spectrum of soaked-TiO2 may mix after dipped in different dye and pigment. Furthermore, we compares the differences between TiO2 dipped in one mix solution and dipped in several solutions separately, measure its IPCE. According to the experiment, the spectrum of soaked-TiO2 is certainly larger, and dipping in solution separately has better effect to the battery.