Development of self-organized interband-type 14-group-element quantum dot solar cells with DA interpenetrated-junctions

2016 Fiscal Year Final Research Report

• Project/Area Number: 25420760
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural/Functional materials
• Research Institution: The University of Shiga Prefecture
• Principal Investigator: Oku Takeo 滋賀県立大学, 工学部, 教授 (30221849)
• Co-Investigator(Renkei-kenkyūsha): Tsuyoshi Akiyama 滋賀県立大学, 工学部, 准教授 (20304751) ; Atsushi Suzuki 滋賀県立大学, 工学部, 助教 (30281603)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 太陽電池材料 / 相互浸透型 / ペロブスイカイト / 14族 / 有機無機複合

Outline of Final Research Achievements

14-group-element-based solar cells with DA interpenetrated-junctions were developed in the present work. Various TiO2/CH3NH3PbI3-based photovoltaic devices were fabricated and characterized. Elemental doping to the perovskite structure and TiO2 were studied by experiments and theoretical calculations, as follows: Cs and Rb doping to the CH3NH3 positions for stability of the structure; Ge, Sn and Sb doping to the Pb positions for improvement of the semiconducting properties; Cl and Br doping to the I positions for enhancement of carrier mobility. PCBM:P3HT:ZnPc DA interpenetrated-junction solar cells with an inverted structure were also fabricated, and the short-circuit current density of the solar cells were improved by the ZnPc addition and Ge dot formation. Conversion efficiencies of spherical Si solar cells coated with SnOx:F anti-reflection thin films were also improved by controlling the interfacial structures. Guidelines for device design were constructed for the new solar cells.

Free Research Field

材料工学