A series of simple metal-free organic dyes MS1–MS3 have been designed and synthesized, and their optical, electrochemical, and photovoltaic properties were investigated. The molecular structures are based on a push–pull framework with a triphenylamine, naphthyldiphenylamine, or anthracenyl diphenylamine as the donor connected to a carboxyphenyl acceptor via a CC bond. The speciality of this new dye design is to obtain higher device open-circuit potentials. The dye-sensitized solar cells using this new sensitizer in combination with I−/I3− exhibited exceptionally high VOC values of 810, 844, and 866 mV for MS1, MS2, and MS3, respectively. The absorption bands of the anthracene-bridged dye MS3 showed remarkable peak broadening and red shifts due to the strong electronic coupling between the donor and bridge facilitated by the C–C triple bond, significantly promoting the light-harvesting capability. The resulting devices of MS3 showed large IPCE values of 75–80% in the region 370–590 nm, giving JSC/mA cm−2 = 8.16, VOC/mV = 866, FF = 0.76, and η = 5.44% under standard AM 1.5G one sun irradiation.
我们设计并合成了一系列简单的无
金属有机
染料 MS1-MS3,并研究了它们的光学、电
化学和光伏特性。这些
染料的分子结构基于推拉框架,以
三苯胺、
萘二苯胺或
蒽二苯胺为给体,通过 CC 键与羧基苯基受体相连。这种新型
染料设计的特点是可以获得更高的器件开路电位。将这种新型敏化剂与 I-/I3- 结合使用的
染料敏化太阳能电池显示出极高的 VOC 值,MS1、MS2 和 MS3 的 VOC 值分别为 810、844 和 866 mV。
蒽桥
染料 MS3 的吸收带显示出显著的峰值拓宽和红移,这是由于 C-C 三键促进了供体和桥之间的强电子耦合,从而显著提高了光收集能力。所制得的 MS3 器件在 370-590 纳米波长区域显示出 75-80% 的高 IPCE 值,在标准
AM 1.5G 单太阳辐照下,JSC/mA cm-2 = 8.16,VOC/mV = 866,FF = 0.76,η = 5.44%。