Near-White Light Emission from Organic-Inorganic Hybrid Based on Dinuclear Metal Complexes

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K05635
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 35030:Organic functional materials-related
• Research Institution: Nippon Institute of Technology
• Principal Investigator: Osawa Masahisa 日本工業大学, 基幹工学部, 教授 (80280717)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 有機無機ハイブリッド材料 / 遅延蛍光性錯体 / リン光性錯体 / 金二核錯体 / 単分子白色発光

Outline of Final Research Achievements

We found that the dinuclear gold(I) complex by-produced in the synthesis process of the TADF-type gold (I) complex exhibits white luminescence. This material had a structure in which two gold-halogen units extending from the each phosphorus atom are cross-linked at the gold site. In this study, several complexes having this unique structure were synthesized using a bisphosphine ligand in which substituents were introduced, and their optical properties were investigated. As a result, it was revealed that the bulky ligand suppressed structural changes in the excited state of these complexes and improves quantum efficiency. Furthermore, by introducing “tuning unit of emission color" into the luminescent complexes, we succeeded in synthesizing a gold(I) binuclear hybrid material that exhibits almost ideal white light (dual emission).

Free Research Field

有機無機ハイブリッド材料

Academic Significance and Societal Importance of the Research Achievements

白色ELは主としてRGBをそれぞれ発光する三種の材料を適切な割合でブレンドすることにより製作されているが、単分子で高効率白色発光を示す材料を使用することが可能となれば、生産プロセスの大幅な簡素化が期待できる。本研究では、分子の構造と光物性の相関を詳細に調査することで、単分子で高効率白色光を示す有機無機ハイブリッド材料の合成法を見い出した点に学術的かつ社会的意義を有する。