Crystal Structure, Carrier Mobility and Band-gap Controls of Coordination Polymers and their Application to Thin-film Solar Cell

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05513
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 34010:Inorganic/coordination chemistry-related
• Research Institution: Kindai University
• Principal Investigator: Okubo Takashi 近畿大学, 理工学部, 教授 (90322677)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 配位高分子 / 有機薄膜太陽電池

Outline of Final Research Achievements

Organic thin-film solar cells are environmentally friendly, light, flexible solar cells that do not use precious metals. Since these organic thin-film solar cells can be manufactured in large quantities at low cost using low-temperature printing processes such as roll-to-roll on plastic substrates, they are expected to have a wide range of applications as ubiquitous power supply devices in the future. In this study, we aimed to develop new conductive coordination polymers that can be applied to these organic thin-film solar cells. In order to use them as semiconducting materials for thin-film solar cells, it is important to control their structure, band gap, and carriers. In this study, we achieved this by combining copper(I) halide with an acceptor π-conjugated ligand. Furthermore, we have found that the material is actually useful as a buffer layer for organic thin-film solar cells.

Free Research Field

錯体化学

Academic Significance and Societal Importance of the Research Achievements

配位高分子はポリマー構造を有する無機・有機複合材料であり、近年ガス吸着や固体触媒など様々な用途への応用が期待され研究されている。電子材料への応用に関してはほとんど行われていないものの、金属イオンを含むポリマー構造を有する配位高分子は第三の半導体材料となりうる可能性があり、この研究分野を開拓することは重要であると考える。本研究では、金属イオンと配位子のエネルギー準位を考慮することで、合理的に半導体材料を合成できることを見いだしており、また有機薄膜太陽電池への応用も可能性あること示した。以上のことから、将来の新たな科学技術の創製に向けての第一歩となりうるものと考えている。