第一部份為本實驗室合成一系列以 LD14 為主體的 LWP 染料,主要改變錨定基團的部分,將雙羧酸導入錨定基團,藉由兩個羧酸根去增強染料錨定在二氧化鈦陽極的能力。此系列包含三支染料 (LWP21, LWP22 及 LWP23),最佳化後效率為 LD14 (8.83 %) > LWP21 (6.27 %) > LWP23 (3.43 %) > LWP22 (2.91 %),由實驗結果來看,導入兩個羧酸根並未使效率增加,主要原因可能為羧酸根的位置會影響電子的注入情況所造成的影響。 第二部分為本實驗室所合成的有機染料 AN-11 和 AN-21,以 anthracene 為主體,在錨定基團旁邊修飾 benzothiadiazole 分子,增加分子結構的共軛長度,以改善有機分子吸光範圍較狹窄的缺點。AN-11 及 AN-21 的吸收光譜和室內燈源的放射光譜具有匹配性,因此在 T5 燈源 200 - 1600 lux的光照下, AN-11轉換效率 9.45 % - 14.50 %、AN-21轉換效率 8.98 % - 13.84 % 及 Z907轉換效率 8.03 % - 13.76 %。由效率來看,AN-11 和 AN-21 具有比商業染料 Z907 有更高的轉換效率。 AN-11 及 AN-21 在太陽光下的元件效率有達 6.78 % 和 7.13 %,顯示出AN-11 和 AN-21 元件不僅能在低照度下有良好的轉換效率,同時兩種元件也能在太陽光下有不錯的轉換效率,且接近市售的商業染料 Z907。
First of all, three new zinc porphyrins dyes have been examined for their fundamental and photovoltaic properties. Anchoring groups bearing two carboxylic acids were introduced into porphyrin dyes in attempts to improve the stability of the dyes on the surface of TiO2. For overall efficiency, the results show a trend of LD14 (8.83 %) > LWP21 (6.27 %) > LWP23 (3.43 %) > LWP22 (2.91 %). Introduction of two carboxylic acid groups does not seem to increase the efficiency, possibly due to the location of the carboxylic acid groups. Secondly, anthracene-based organic dyes were studied for their photovoltaic properties under one sun and dim light conditions. Under 200 lux of T5 light, the AN-11 and AN-21 showed PCE 9.45 % and 8.38 %, respectively, which are higher than that of the Z907 dye. Under one sun, the AN-11 and AN-21 showed the PCE 6.78% and 7.13%. The AN-11 and AN-21 exhibit great potential for solar cell applications under outdoor and indoor environments.