Wu Fan, Zhu Yanyan, Ye Xunheng, Li Xiaoyi, Tong Yanhua, Xu Jiaxing
School of Science and Key Lab of Optoelectronic Materials and Devices, Huzhou University, Huzhou, 313000, People's Republic of China.
Department of Material Chemistry, Huzhou University, Huzhou, 313000, People's Republic of China.
Nanoscale Res Lett. 2017 Dec;12(1):85. doi: 10.1186/s11671-017-1867-5. Epub 2017 Feb 3.
The polymer/TiO array heterojunction interfacial characteristics can be tailored by balanced dipole effects through integration of TiO-quantum dots (QDs) and N719 at heterojunction interface, resulting in the tunable photovoltaic performance. The changes of V with interfacial engineering originate from the shift of the conduction band (E ) edge in the TiO nanorod by the interfacial dipole with different directions (directed away or toward the TiO nanorod). The J improvement originates from the enhanced charge separation efficiency with an improved electronic coupling property and better charge transfer property. The balanced dipole effects caused by TiO-QDs and N719 modification on the device V are confirmed by the changed built-in voltage V and reverse saturation current density J .
通过在异质结界面处整合TiO量子点（QDs）和N719，利用平衡偶极效应可调整聚合物/TiO阵列异质结的界面特性，从而实现可调节的光伏性能。界面工程导致的V变化源于TiO纳米棒中导带（E）边缘因不同方向（远离或朝向TiO纳米棒）的界面偶极而发生的移动。J的提高源于电荷分离效率的增强，这得益于电子耦合性能的改善和电荷转移性能的提高。由TiO量子点和N719对器件V的修饰所引起的平衡偶极效应，通过内建电压V和反向饱和电流密度J的变化得到证实。
