异质结表/界面修饰对杂化太阳电池性能的优化

Modification of heterojunction surface/interfacial to optimize the hybrid solar cells efficiency

为了增进无机半导体和有机聚合物半导体之间的相容性,优化电池的光电性能,基于一维无机TiO2纳米棒有序阵列和有机聚合物PCPDTBT,构建了一种结构为TiO2/PCPDTBT的杂化太阳电池。用一种有机三苯胺类两亲分子来调控此无机、有机材料的两相表/界面性质。采用SEM,TEM,XRD,EDS,UV-vis,PL等方法对杂化膜电极进行表征。电池性能测试表明,表/界面修饰后太阳电池的性能得到提高,电池效率η为0.81%;开路电压衰减测试表明,异质结表/界面经修饰后,杂化太阳电池的电子寿命有所提高。因此,通过异质结表/界面修饰改善活性层的形貌结构对电池性能有重要影响。

In order to improve the compatibility between inorganic semiconductor and organic polymer semiconductor,and optimize the photoelectric performance of the battery,a hybrid solar cell of TiO2/PCPDTBT based on one dimensional inorganic TiO2 nanorods ordered arrays and organic polymer PCPDTBT is constructed.The heterojunction interface properties between the inorganic and organic materials are controlled by amphiphilic organic triphenylamine-type molecules.The properties of the hybrid films are characterized by scanning electron microscope（SEM）,transmission electron microscope（TEM）,X-ray diffraction（XRD）,energy dispersive spectrometer（EDS）,UV-vis spectra（UV-vis）,photoluminescence spectroscopy（PL）,etc..The battery performance tests demonstrate that the photovoltaic performance of the modified cell is improved,and the power conversion efficiencyηis of 0.81%.Open circuit voltage decay tests demonstrate that the electron lifetime is increased after heterojunction surface/interfacial modification.These results indicate that the amelioration of morphology and structure of the active layer plays an important role on solar cell performance,by means of modification of the heterojunction surface/interface.