聯吡啶釕錯合物之性質探討及應用於太陽能電池之研究

Abstract

在本研究中合成了一系列釕錯合物，Ru(LL)(dcbpy)2+ (LL = dabpy, bpy, dMeObpy, Cl2bpy, dcbpy, deebpy, 5,5’-dcbpy) 與 Fe(dcbpy)32+，並測量它們的 UV-vis、emission 光譜、lifetime 與氧化還原電位，以了解配位基的推拉電子基修飾對電子分布之影響。 此類錯合物作為染料並配合 3I-/I3- + BMII、2Br-/Br2、2Br-/Br2 + BMII 與 2Br-/Br2 + BMIBr 四種電解質，製成光敏性染料太陽能電池並測量其效率。在 3I-/I3- + BMII 與 2Br-/Br2 + BMII 環境下 Ru(dabpy)(dcbpy)2+ 有最好的光電轉換效率，在 2Br-/Br2 與 2Br-/Br2 + BMIBr 的環境下，Ru(bpy)(dcbpy)2+ 與 Ru(phen)(dcbpy)2+ 具有最好的光電轉換效率。 當電解質使用 2Br-/Br2 與 2Br-/Br2 + BMIBr 時可以測得的Voc 最大約為 0.9 V，而 3I-/I3- + BMII 與 2Br-/Br2 + BMII 所測得的 Voc 最高值約為0.6 V。 以 Fe(dcbpy)32+ 製成的光電池 Voc、Isc、ff 與光電轉換效率均趨近於零。 以 N719 為染料，並使用 tetracyanoethylene、ammonium diethyldithiocarbamate、potassium ethylxanthate 與 dimethylaniline 作為電解質所製成之光電池 Voc、Isc、ff 與光電轉換效率均趨近於零。

A series of Ru(LL)(dcbpy)2+ complexes, where LL = dabpy, dMeObpy, bpy, Cl2bpy, dcbpy and deebpy, and Fe(dcbpy)32+, have been synthesized. UV-vis, emission, electrochemistry and lifetime have been measured for all complexes in order to understand their photophysical and redox properties. These complexes, preformed as dye, have been assembled to a solar cell. Electrolytes utilized in the solar cells were 3I-/I3- + BMII, 2Br-/Br2, 2Br-/Br2 + BMII and 2Br-/Br2 + BMIBr. When 3I-/I3- and 2Br-/Br2 + BMII were utilized as electrolyte, Ru(dabpy)(dcbpy)2+ gave the best result. When 2Br-/Br2 and 2Br-/Br2 + BMIBr were utilized as electrolyte, Ru(bpy)(dcbpy)2+ and Ru(phen)(dcbpy)2+ resulted the highest output. When using all bromine based electrolytes, such as 2Br-/Br2 and 2Br-/Br2 + BMIBr, the Voc of 0.9 V is measured. In the same condition but with iodide present, 3I-/I3- and 2Br-/Br2 + BMII, the Voc measured was 0.6 V. There was no Voc, Isc, ff and conversion efficiency measured when Fe(dcbpy)32+ was utilized as dye. In the attempt of finding new series of electrolytes, we found no Voc, Isc, ff nor conversion efficiency measured with tetracyanoethylene, ammonium diethyldithiocarbamate, potassium ethylxanthate and dimethylaniline as electrolytes and N719 as dye.