本論文主要是進行太陽光電極的探討。在結構上，主要是以不同比例二氧化鈦奈米柱與奈米粒子混合構成。而奈米柱的製備則是以水熱法進行，並經過700oC退火處理2小時後，得到銳鈦礦相之二氧化鈦奈米柱。前期利用N3染料對不同結構以及四氯化鈦溶液處理時間的太陽能光電極進行敏化，並利用氫氧化鈉溶液將染料洗出，進行光陽極吸附量之比較，以找出較佳的光陽極製作條件為奈米柱與奈米粒子混合比為8：2，40mM四氯化鈦溶液在60oC處理時間為60分鐘下，光電轉換效率與效率值分別為81%與3.26%。再進行CdSeS量子點敏化光陽極的研究。其中CdSeS量子點敏化光陽極是以3-巰基丙酸或11-巰基十一酸進行二氧化鈦光陽極表面改質，使具有雙官能基的表面活性劑羧基接上二氧化鈦表面，再利用另一端的硫醇鍵鍵結於CdSeS量子點的表面，並在研究上以紫外光吸收光譜、螢光光譜、載子生命週期等量測進行量子點吸附於二氧化鈦光陽極前後的比較，另外，由伏安循環法所得到CdSeS量子點與此二雙官能基間的能階關係中推測螢光光譜與載子生命週期的衰退是由於量子點的電洞傳導至雙官能基上而造成的。最後再組合成太陽能電池進行光電轉換效率與效率曲線的電性量測。

In this study, hydrothermal method was employed to grow 1-D titanate nanorods, which is annealed at 700oC for 2 hours to transfer 1-D titanate to anatase titanium dioxide (TiO2) nanorods. Difference TiO2 photoanodes were make by mixing TiO2 nanorods and P25 particles and different TiCl4(aq) treated time. In order to find out the optimum mixture condition of TiO2 photoanode, different kinds of TiO2 photoanodes were sensitized with N3 dye. The absorbed amount of N3 dye was analyzed by UV-visible absorption spectroscopy. Based on the optimum condition of TiO2 photoanode, quantum dots sensitized photoanode was studied by using home-made CdSeS quantum dots (QDs).
In this study, two different kinds of linker, 3-mercaptoproponic acid (MPA) and 11-mercaptoundecanoic acid (MUA), were used to anchor CdSeS QDs on the surface of TiO2 photoanode. The properties of CdSeS QDs sensitized photoanode were characterized by absorption spectroscopy, photoluminescence and lifetime analysis, the band gap structure of CdSeS and MPA or MUA were decided by cyclic voltammetry (CV), and the cell performances were characterized by incident-photocurrent efficiency (IPCE) and current-voltage (I-V) measurement.

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