Balanced Dipole Effects on Interfacial Engineering for Polymer/TiO₂ Array Hybrid Solar Cells

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• 作者：Fan Wu ; Yanyan Zhu ; Xunheng Ye ; Xiaoyi Li ; Yanhua Tong&#8230
• 关键词：TiO2 ; Array ; Hybrid solar cells ; Interfacial engineering
• 刊名：Nanoscale Research Letters
• 出版年：2017
• 出版时间：December 2017
• 年：2017
• 卷：12
• 期：1
• 全文大小：3035KB
• 刊物主题：Nanotechnology; Nanotechnology and Microengineering; Nanoscale Science and Technology; Nanochemistry; Molecular Medicine;
• 出版者：Springer US
• ISSN：1556-276X
• 卷排序：12

文摘

The polymer/TiO₂ array heterojunction interfacial characteristics can be tailored by balanced dipole effects through integration of TiO₂-quantum dots (QDs) and N719 at heterojunction interface, resulting in the tunable photovoltaic performance. The changes of V_oc with interfacial engineering originate from the shift of the conduction band (E_c) edge in the TiO₂ nanorod by the interfacial dipole with different directions (directed away or toward the TiO₂ nanorod). The J_sc 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 TiO₂-QDs and N719 modification on the device V_oc are confirmed by the changed built-in voltage V_bi and reverse saturation current density J_s.