【摘要】 利用MEVVA技术分别将金属Fe、Ni、Ag离子注入进DSSCs结构中作为电荷传输层的TiO₂膜,表征了各金属离子注入后TiO₂膜表面形貌及晶相结构,研究了DSSCs注入前后光电性能及电池内部界面的电荷传输变化。能带理论分析显示,金属离子注入后,TiO₂能带结构发生变化,并在其禁带中引入了杂质能级,不仅优化了TiO₂导带与染料LUMO能级匹配度,而且杂质能级为电荷的传输提供了额外传输"通道",从而降低了电荷传输过程中的复合率。DSSCs光电性能测试结果显示,与未注入的DSSCs相比,Fe、Ni、Ag离子注入DSSCs的光电转化率分别提高了13.6%、12.7%、34.2%。更多还原

【Abstract】 Fe,Ni,Ag ions-implanted DSSCs were successfully prepared via MEVVA technology.Surface morphology and crystal structure were characterized by SEM and XRD,and photoelectric properties and charge transport were measured by I-Vtest and electrochemical impedance,respectively.According to band theory,the band structure of TiO₂ was changed and impurity levels were introduced in band gap after metal ions implantation,which optimized the matching rate between the conduction band of TiO₂ and LUMO levels of dye.Moreover,the impurity level provided extra"channel"for charge transferring,which reduced charge recombination.Compared with un-implanted cells,the photoelectric conversion efficiencies of Fe,Ni,Ag ions implanted DSSCs were improved by 13.6%,12.7% and 34.2%,respectively.更多还原