【摘要】 采用两步阳极氧化法制备了孔径均匀的多孔阳极氧化铝(AAO)模板,利用纳米压印技术构筑了高度规整的聚偏二氟乙烯-三氟乙烯共聚物P(VDF-Tr FE)纳米结构阵列,并通过压电力显微镜(PFM)直观地观测P(VDFTr FE)纳米结构阵列的极化翻转行为,结果表明具有择优取向的P(VDF-Tr FE)纳米结构阵列具有较低的矫顽场.将这一结构应用到聚合物太阳能电池正极与半导体聚合物层间,并成功通过外部极化电场的变化实现了对太阳能电池效率的调控.通过对太阳能电池性能的测试发现,不同的极化方向对太阳能电池效率具有十分重要的影响,其中当铁电层呈现电负性时,器件的光电转化效率提高了25%.更多还原

【Abstract】 Porous anodic aluminum oxide(AAO) by a double anodization process was prepared. The AAO template was used for nanoimprint lithography, the highly orderly P( VDF-Tr FE) nanorods was successfully fabricated.Piezoresponse force microscopy(PFM) was used to observe the transform of polarization and a lower coercive voltage was found in the nanorods, the coercive field of P(VDF-Tr FE) nanorodes with crystal preferential orientation is much lower than films. Then the patterned ferroelectric polymer layer was applied to the positive pole of organic solar cell in order to avoid the chemical reaction between P(VDF-Tr FE) and metal electrode. In the end, the energy conversion efficiency was successfully controlled by change the direction of polarization. The energy conversion efficiency is enhanced 25% when the ferroelectric layer is negative polarized.更多还原