臺灣國際科展

化學光電池之光敏劑的開發與研究

科展類別
臺灣國際科展
屆次
2006年
科別
化學科
學校名稱
臺北市立第一女子高級中學
指導老師
張一知、張永佶
作者
陳禹瑾
關鍵字
光電池,光敏劑

摘要或動機

六種自行合成出來的聯吡啶釕錯合物Ru(bpy)₃、Ru(bpy)₂(phen) 、 Ru(bpy)₂dcbpy、Ru(phen)₃、Ru(phen)₂(bpy)、Ru(phen)₂dcbpy
及商用染料N3-dye,被成功的做成光敏性太陽能電池。光電流的產生率可由IPCE (incident photon-to-current conversion
efficiency) 的測量可知。此類釕錯合物可以物理吸附或化學鍵結於TiO₂奈米粒子上。IPCE 的大小可以用來探討不同吸附方式的釕錯合物轉換光電流的效率。在物理吸附上Ru(phen)₂(bpy)的效率最好。化學鍵結的以N3
Dye 最好,我們合成的錯合物以Ru(bpy)₂dcbpy 較佳。此種以TiO₂奈米結構為承載基材的太陽能光電池(Dye-Sensitized Solar Cell),染料仍以商用染料
N3-dye 最佳。本研究發現物理吸附的Ru complexes 也可產生光電流,若能最佳化,將可簡化染料錯合物之合成。

Six ruthenium complexes, Ru(bpy)₃, Ru(bpy)₂(phen), Ru(bpy)₂dcbpy, Ru(phen)₃, Ru(phen)₂(bpy),
and Ru(phen)₂dcbpy were synthesized. These Ru complexes and N3 dye have been incorporated
into the dye-sensitized solar cell system. The solar energy conversion of the ruthenium
complexes were measured and converted to IPCE (incident photon-to-current conversion
efficiency). There complexes were either chemically bonded or physically absorbed
onto the nano-sized TiO₂ particles. The IPCE were utilized to compare the photon-to-current
efficiency of these Ru complexes. Among the physical-absorbed dyes, Ru(phen)₂(bpy)
has the highest IPCE. For chemical-absorbed dyes, the commercial N3 dye is still
the best. Among the complexes synthesized in this research that are chemical-absorbed,
Ru(phen)₂dcbpy has the highest IPCE

The commercial N3 dye has the highest IPCE in the dye-sensitized TiO₂nanoparticle
solar cell. We found that physically absorbed dye can convert photon to current.
With better solar cell assembly, physically absorbed dye can have the same conversion
efficiency as N3 dye.



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