Molecular engineering of panchromatic unsymmetrical squaraines for dye-sensitized solar cell applications
作者:Hyunbong Choi、Jeum-Jong Kim、Kihyung Song、Jaejung Ko、Md. K. Nazeeruddin、Michael Grätzel
DOI:10.1039/b926863d
日期:——
Three unsymmetrical squaraine dyes JK-64, JK-65, and JK-64Hx, containing a bulky spirobifluorene or hexyloxyphenyl unit are designed and synthesized. These sensitizers, when anchored onto a TiO2 surface, exhibit decreased aggregation as well as enhanced unidirectional flow of electrons. Under standard global AM 1.5 solar conditions, an optimized JK-64Hx sensitized cell gave a short-circuit photocurrent density (Jsc) of 12.82 mA cm−2, an open-circuit voltage (Voc) of 0.54 V and a fill factor (ff) of 0.75, corresponding to an overall conversion efficiency (η) of 5.20%.
本研究设计并合成了三种不对称的角鲨烷染料 JK-64、JK-65 和 JK-64Hx,它们都含有笨重的螺二芴或己氧基苯基单元。这些敏化剂锚定在二氧化钛表面后,可减少聚集并增强电子的单向流动。在标准全球 AM 1.5 太阳能条件下,经过优化的 JK-64Hx 感光电池的短路光电流密度 (Jsc) 为 12.82 mA cm-2,开路电压 (Voc) 为 0.54 V,填充因子 (ff) 为 0.75,整体转换效率 (η) 为 5.20%。