Sun Xiaobo, Liu Yunqi, Xu Xinjun, Yang Chunhe, Yu Gui, Chen Shiyan, Zhao Zhehui, Qiu Wenfeng, Li Yongfang, Zhu Daoben
Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, PR China.
J Phys Chem B. 2005 Jun 2;109(21):10786-92. doi: 10.1021/jp0509515.
Four donor-acceptor functionalized molecular materials with symmetrical structures have been synthesized and investigated for their use in optoelectronic applications. These pi-conjugated molecules consist of one electron-donating moiety, for instance, carbazole, triphenylamine, or phenothiazine at the center, and two acceptors at each side. Introduction of different donor moieties decreases the band gaps allowing a fine-tuning of the optical and electrical properties. These materials exhibit multifunctional properties, such as a red light-emitting behavior and a large photovoltaic effect. Red organic light-emitting diodes were fabricated in a facile nondoping configuration based on these materials. Saturated red-emission is observed with a CIE of x = 0.64 and y = 0.33, and an external quantum efficiency of 0.19%. In addition, our first observation of photovoltaic response in the pi-conjugated molecule with donor-acceptor-donor structure is reported. The organic single-component photovoltaic cells were fabricated and characterized. Their open-circuit voltage and short-circuit current density are 1.1 V and 0.07 mA cm(-2), respectively. The photovoltaic effect corresponds to the absorption characteristics of the compound and depends on the nature of the electron-donating group.
已经合成了四种具有对称结构的供体-受体功能化分子材料，并对其在光电子应用中的用途进行了研究。这些π共轭分子由一个供电子部分组成，例如中心的咔唑、三苯胺或吩噻嗪，以及两侧各两个受体。引入不同的供体部分会减小带隙，从而可以对光学和电学性质进行微调。这些材料表现出多功能特性，如发红光行为和大的光伏效应。基于这些材料，以简便的非掺杂结构制备了红色有机发光二极管。观察到饱和红光发射，其CIE为x = 0.64和y = 0.33，外部量子效率为0.19%。此外，报道了我们首次在具有供体-受体-供体结构的π共轭分子中观察到光伏响应。制备并表征了有机单组分光伏电池。它们的开路电压和短路电流密度分别为1.1 V和0.07 mA cm(-2)。光伏效应与化合物的吸收特性相对应，并取决于供电子基团的性质。
