Koumura Nagatoshi, Wang Zhong-Sheng, Mori Shogo, Miyashita Masanori, Suzuki Eiji, Hara Kohjiro
National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan.
J Am Chem Soc. 2006 Nov 8;128(44):14256-7. doi: 10.1021/ja0645640.
We designed and synthesized new alkyl-functionalized organic dyes, MK-1 and MK-2, for dye-sensitized solar cells (DSSCs). Based on the MK-2 dye, a high performance of efficiency (eta, 7.7%; short-circuit current density Jsc = 14.0 mA cm-2, open-circuit voltage Voc = 0.74 V, and fill factor FF = 0.74) was achieved under AM 1.5 G irradiation (100 mW cm-2). Remarkably, the relatively higher Voc for DSSCs based on MK-1 and MK-2 dyes, which have long alkyl chains, were observed among the organic dyes caused by the increasing of the electron lifetime in the conduction band of TiO2. Our molecular design of alkyl-functionalized dyes strongly suggests the promising performance of molecular photovoltaics based on organic dyes.
我们设计并合成了用于染料敏化太阳能电池（DSSC）的新型烷基官能化有机染料MK-1和MK-2。基于MK-2染料，在AM 1.5 G光照（100 mW cm-2）下实现了高效性能（η = 7.7%；短路电流密度Jsc = 14.0 mA cm-2，开路电压Voc = 0.74 V，填充因子FF = 0.74）。值得注意的是，在有机染料中，基于具有长烷基链的MK-1和MK-2染料的DSSC具有相对较高的Voc，这是由于TiO2导带中电子寿命的增加所致。我们对烷基官能化染料的分子设计有力地表明了基于有机染料的分子光伏具有良好的性能。
