具有改善填充因子的高效咔唑基小分子有机太阳能电池。
Efficient carbazole-based small-molecule organic solar cells with an improved fill factor.
作者信息
Liu Yongtao, Sun Yanna, Li Miaomiao, Feng Huanran, Ni Wang, Zhang Hongtao, Wan Xiangjian, Chen Yongsheng
机构信息
State Key Laboratory and Institute of Elemento-Organic Chemistry, The Centre of Nanoscale Science and Technology, Key Laboratory of Functional Polymer Materials, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), College of Chemistry, Nankai University Tianjin 300071 China
出版信息
RSC Adv. 2018 Jan 26;8(9):4867-4871. doi: 10.1039/c7ra10387e. eCollection 2018 Jan 24.
In this study, a new acceptor-donor-acceptor (A-D-A) small molecule, DI3TCz, with carbazole as the central unit and 1,3-indanedione as the end group, was designed and synthesized for application in organic solar cells. In contrast to the molecule DR3TCz with rhodanine as end groups, DI3TCz exhibited deep a LUMO energy level and a nearly unchanged HOMO energy level with a narrow optical band gap of 1.75 eV and red shifted absorption. Compared with DR3TCz, the DI3TCz device showed a PCE of 6.46% with a remaining high value of 0.97 V, improved of 10.40 mA cm and a notable FF of 0.65, which is the highest PCE value reported to data for carbazole-based small molecules OPVs.
在本研究中，设计并合成了一种新型的受体-供体-受体（A-D-A）小分子DI3TCz，其以咔唑为中心单元，以1,3-茚二酮为端基，用于有机太阳能电池。与以罗丹宁为端基的分子DR3TCz相比，DI3TCz表现出较深的最低未占分子轨道（LUMO）能级和几乎不变的最高已占分子轨道（HOMO）能级，光学带隙窄至1.75 eV，吸收光谱发生红移。与DR3TCz相比，DI3TCz器件的功率转换效率（PCE）为6.46%，开路电压（Voc）仍高达0.97 V，短路电流密度（Jsc）提高到10.40 mA cm，填充因子（FF）显著提高至0.65，这是目前报道的咔唑基小分子有机光伏器件的最高PCE值。
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