“Click-chemistry” approach in the design of 1,2,3-triazolyl-pyridine ligands and their Ru(ii)-complexes for dye-sensitized solar cells
作者:Ilona Stengel、Amaresh Mishra、Nuttapol Pootrakulchote、Soo-Jin Moon、Shaik M. Zakeeruddin、Michael Grätzel、Peter Bäuerle
DOI:10.1039/c0jm03750h
日期:——
The synthesis of new 1,2,3-triazolyl-pyridine ligands via âclick-chemistryâ and their corresponding Ru(L)(2,2â²-bipyridyl-4,4â²-dicarboxylic acid)(NCS)2 complexes (L = 1,2,3-triazolyl-pyridine) are presented. The complexes have been photophysically and electrochemically characterized and have been used as sensitizers in dye-sensitized solar cells (DSSC). In DSSCs with an acetonitrile-based electrolyte the cells comprising of Ru(2-(1-(4-hexylphenyl)-1H-1,2,3-triazol-4-yl)pyridine)(2,2â²-bipyridyl-4,4â²-dicarboxylic acid)(NCS)2 TBA salt 1 showed an overall power conversion efficiency of 7.8% under full sunlight intensity, and Ru(2-(4-(4-hexylphenyl)-1H-1,2,3-triazol-1-yl)pyridine)(2,2â²-bipyridyl-4,4â²-dicarboxylic acid)(NCS)2 TBA salt 2 an efficiency of 4.7%. Transient photovoltage and photocurrent decay measurements showed an enhanced performance for dye 1 due to faster electron transport into the TiO2 film and lower recombination rate in comparison to dye 2 sensitized devices. Additionally, solid-state devices were prepared with 2 μm thick TiO2 films using spiro-OMeTAD as a hole-transport material. The solid-state dye-sensitized solar cells showed power conversion efficiencies of 1.92% and 0.38% for sensitizer 1 and 2, respectively.
本文介绍了通过“点击化学”合成的新型1,2,3-三唑基吡啶配体及其对应的Ru(L)(2,2′-联吡啶-4,4′-二羧酸)(NCS)2配合物(L = 1,2,3-三唑基吡啶)。这些配合物已在光物理和电化学特性方面进行了表征,并且作为染料敏化太阳能电池(DSSC)的敏化剂。在基于乙腈的电解质的DSSC中,包含Ru(2-(1-(4-己基苯基)-1H-1,2,3-三唑-4-基)吡啶)(2,2′-联吡啶-4,4′-二羧酸)(NCS)2的TBA盐1在全日光强度下表现出7.8%的整体能量转化效率,而Ru(2-(4-(4-己基苯基)-1H-1,2,3-三唑-1-基)吡啶)(2,2′-联吡啶-4,4′-二羧酸)(NCS)2的TBA盐2的效率为4.7%。瞬态光电压和光电流衰减测量表明,由于与染料2敏化器相比,染料1的电子运输速度更快且重组率更低,从而实现了更优的性能。此外,还使用2微米厚的TiO2膜和作为孔传输材料的螺旋-OMeTAD制备了固态器件。固态染料敏化太阳能电池的能量转化效率分别为1.92%和0.38%,对应于敏化剂1和2。