Synthesis and Properties of Novel Photo-sensitizers Bearing a Diarylamine or Dialkylamine Electron-donating Group.

[[abstract]]染料敏化太陽能電池;紫質光敏劑;有機分子光敏劑 dye-sensitized solar cell; porphyrin sensitizers; organic sensitizers 本論文中，利用 Sonogashira cross-coupling 方法合成了用於染料敏化太陽能電池的敏化劑。這兩個紫質敏劑: LWP13、LWP14和2個有機分子光敏劑: LHO1、LHO2，採用二苯胺或二烷胺作為推電子基團，以 benzothiadiazole（BTD）作為拉電子基團， carboxylic acid 或 cyanoacrylic acid作為錨定基團。 兩個紫質染料在 UV-Vis 吸收光譜中，Q bands部分可以發現吸收波長範圍皆位於 600-750 nm，在 Soret bands 部分，LWP14 的 Soret bands 吸收範圍較 LWP13的 Soret bands 吸收範圍來得些許紅移。從電化學實驗可以得知，在氧化電位方面，含有二苯胺推電子基的染料 (LWP14) 比採用二烷胺推電子基染料 (LWP13) 來得往正電位方向移動。在還原電位方面，兩支紫質染料則是沒有太大的差異性。PCE 數值中，LWP13 以及 LWP14 的單一元件轉換效率趨勢為: LWP14 (7.48%) > LWP13 (5.50%)。 最後，我們另外合成了兩個含有不同錨定基團的有機分子光敏劑，分別為 carboxylic acid 和 cyanoacrylic acid。從電化學實驗觀察到兩個有機光敏劑的氧化電位皆非常相似， 而在還原電位方面， LHO2 (cyanoacrylic acid) 的還原電位比 LHO1(carboxylic acid) 的還原電位來得往正電位方向移動。[[abstract]]Two porphyrin dyes and two organic dyes are synthesized by Sonogashira cross-coupling method for DSSC application. A diarylamine or dialkylamine is used as the donor groups, benzothiadiazo (BTD) is used as the acceptor groups, and carboxylic acid or cyanoacrylic acid is used as the anchoring groups in these dyes. The Q bands of these porphyrins have similar absorption range(600-750 nm), and the Soret bands of LWP14 are more red-shifted than those of LWP13. Elctrochemical experiments show that the oxidation potentials of LWP14 are positive-shifted from those of LWP13.The reduction potentials of these two porphyrins have not much difference.For the DSSCs, PCE values of LWP13 and LWP14 are 7.48% and 5.50%, respectively. Two organic dyes bearing different anchoring groups were also studied. Elctrochemical data show that the oxidation potentials of LHO1 and LHO2 are similar to each other whereas the reduction potential of LHO2 is positive-shifted from that of LHO1.[[note]]碩