
摘要:NiO作为常用的光阴极材料,由于其带隙(3.5 eV)较宽,对可见光的利用率较低,为了提高其光电性能,常采用染料对其进行敏化。目前常用的染料主要是金属有机配合物,然而这些染料在可见光区缺乏吸收限制了其实际应用,为了改善其光吸收特性以更好的敏化NiO光阴极,设计合成了一种新型铱配合物染料用于敏化NiO,该配合物表示为(ppy-CHO)2Ir(phen-BDP) (ppy-CHO = 4-(2吡啶基)苯甲醛,phen-BDP = 带有菲啰啉的Bodipy),其在可见光下具有强吸收,该铱配合物染料敏化的NiO具有优异的光电信号响应,并且稳定性良好,因此设计合成的铱配合物染料在光电化学中具有潜在应用价值。
Abstract:As
a commonly used photocathode material,NiO exhibits a wide band gap (3.5 eV) and
low utilization of visible light.In order to improve its performance,dyes are
often used to sensitize it.At present,the commonly used dyes are mainly metal
organic complexes,such as ruthenium (II) complexes and iridium (III)
complexes.The lack of absorption of these dyes in the visible light region
limits their practical application. In order to improve their light absorption characteristics
to better sensitize the NiO photocathode,a novel iridium complex dye was designed and
synthesized for sensitizing NiO.The complex (ppy-CHO)2Ir(phen-BDP)
(ppy-CHO=4-(2-pyridyl) benzaldehyde,phen-BDP=Bodipy with phenanthroline)
exhibited strong absorption under visible light,and it sensitized NiO exhibited
excellent photocurrent signal response and good stability.Therefore,the
designed and synthesized iridium complex dye exhibited potential application
value in photoelectrochemistry.
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