highly efficient and transparent solar cells based on the charge management layer

2015 Fiscal Year Final Research Report

• Project/Area Number: 25871029
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Energy-related chemistry; Energy engineering
• Research Institution: Oyama National College of Technology
• Principal Investigator: Kato Takehito 小山工業高等専門学校, 機械工学科, 講師 (90590125)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 有機太陽電池 / 有機薄膜太陽電池 / 色素増感太陽電池 / 酸化物半導体 / 全塗布型太陽電池 / フラーレン代替

Outline of Final Research Achievements

In this work, we focus on Ti-alkoxides as electron acceptors in the photoactive layers of fullerene-free bulk-heterojunction solar cells. We show that it is
possible to control the morphology by adjusting the molecular structure and size of the Ti-alkoxides. The short-circuit current density (Jsc) increased to 191 μA/cm2 from 25 μA/cm2 with a maximum, when the phaseseparation structure was continuously formed to within about 20 nm below the exciton diffusion length by using either titanium(IV) ethoxide or isopropoxide as an electron acceptor. Within a thickness of 30 nm, the photoactive layer is not influenced by the electron transfer ability; thus, we demonstrate that the chargeseparation
efficiency is equivalent to that of a fullerene system.

Free Research Field

エネルギー変換素子の開発