在此,我们报告了三种新型不对称无金属咔唑基有机染料E 1–3(具有A–π-D–π-A结构)的设计和合成,它们是DSSC中有效的双锚定敏化剂。新实体包括咔唑作为连接到三个不同的单元,一个供体的支架即。氰基乙酸,2,4-噻唑烷二酮和巴比妥酸通过受体/锚定单元亚乙烯基和亚苯基分别在咔唑环的3位和6位上作为π间隔基。为了评估它们作为活性敏化剂的可行性,进行了光物理,电化学和理论研究。此外,评估了它们在制备的DSSC中的光电化学性能和电荷传输性能。结果表明,用E 1敏化剂制成的器件在三种染料中显示出最高的PCE,为2.38%。发现其J SC,V OC和IPCE值为6.36 mA cm -2,0.599 V和57%。其增强的性能归因于咔唑核的任一侧通过适当的π-间隔基存在高度吸电子的氰基乙酸单元。有趣的是,DFT研究表明,与在3位连接的氰基丙烯酸相比,LUMO能级的电子云已显着移向咔唑环第6位连接的2-氰基苯基丙烯酸。E
Synthesis and properties of a thiophene-substituted diaza[7]helicene for application as a blue emitter in organic light-emitting diodes
作者:Ting Chen、Baojie Zhang、Zhi Liu、Lian Duan、Guifang Dong、Ying Feng、Xinyu Luo、Deliang Cui
DOI:10.1016/j.tetlet.2016.12.069
日期:2017.2
stability with no melting point and a high decomposition temperature of 453.64 °C. A doped device with a structure of ITO/NPB (50 nm)/CBP: 10% 6 (30 nm)/Bphen (20 nm)/Mg:Ag (150 nm)/Ag (50 nm) emitted the blue light at 460 nm with Commission Internationale de LEclairage (CIE) coordinate of (0.176, 0.26). The maximum brightness and external quantum efficiency (EQE) were 2306 cd m−2 and 0.41%, respectively
已成功合成了噻吩基取代的咔唑基二氮杂[7] hel烯,2,12-二噻吩-5,15-二己基-5,15-二氮杂[7] hel烯(6),并通过1 H NMR,13 C确证NMR,高分辨率质谱,飞行时间质谱。化合物6显示出良好的溶解性和优异的热稳定性,没有熔点,并且分解温度为453.64℃。具有ITO / NPB(50 nm)/ CBP:10%6(30 nm)/ Bphen(20 nm)/ Mg:Ag(150 nm)/ Ag(50 nm)结构的掺杂器件在460发出蓝光坐标为(0.176,0.26)的国际照明委员会(CIE)的nm。最大亮度和外部量子效率(EQE)为2306 cd m -2 和0.41%。
Four novel D–D–π–A configuration metal-free organic dyes (C3, P2, C2 and P3) with triphenylethylene phenothiazine moieties or triphenylethylene carbazole moieties as additional electron donors for dye-sensitized solar cells (DSSCs) have been synthesized. The cells based on C3, P2, C2 and P3 dyes with efficiencies of 2.14%, 2.69%, 5.51% and 6.55%, respectively, are obtained. The P3 based cell exhibits the highest efficiency of 6.55% accompanied by a short-circuit current density (Jsc) of 12.18 mA cm−2, a rather high open-circuit photovoltage (Voc) of 826 mV, and a fill factor (ff) of 0.65, performances which are remarkable in the DSSCs based on metal-free organic dyes. The twisted non-planar configuration in P3 decelerates the charge recombination in the charge-separated state and hence contributes to the improvement of the performance of DSSCs.
合成了四种新型的D–D–π–A结构无金属有机染料(C3、P2、C2和P3),它们分别以三苯乙烯酚噻嗪基团或三苯乙烯咔唑基团作为附加电子供体,用于染料敏化太阳能电池(DSSCs)。基于C3、P2、C2和P3染料的电池效率分别为2.14%、2.69%、5.51%和6.55%。基于P3的电池表现出最高的效率为6.55%,伴随有12.18 mA cm−2的短路电流密度(Jsc)、826 mV的相当高的开路光电压(Voc)以及0.65的填充因子(ff),这些性能在基于无金属有机染料的DSSCs中是非常显著的。P3中的扭曲非平面结构减缓了电荷分离状态下的电荷复合,从而有助于提高DSSCs的性能。