Challenge to Printed Organic Laser

2024 Fiscal Year Final Research Report

• Project/Area Number: 22K19059
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 35:Polymers, organic materials, and related fields
• Research Institution: Nagoya University
• Principal Investigator: TAKENOBU Taishi 名古屋大学, 工学研究科, 教授 (70343035)
• Project Period (FY): 2022-06-30 – 2025-03-31
• Keywords: レーザー / 電気化学

Outline of Final Research Achievements

This study aimed to realize solution-processed laser devices by leveraging the unique properties of organic materials, focusing on the development of light-emitting devices based on light-emitting electrochemical cells (LECs). In addition to organic polymers, monolayer transition metal dichalcogenides (TMDs) were incorporated, and optimization of electrolytes combined with pulsed voltage application enabled the injection of high current densities exceeding 1 MA/cm2. This represents a significant step toward achieving population inversion under electrical excitation. Although laser emission was not attained, foundational technologies, including material exploration, device architecture design, and driving condition optimization, were established to support the future realization of printable laser devices.

Free Research Field

デバイス物理

Academic Significance and Societal Importance of the Research Achievements

本研究は、次世代のレーザー素子の実現を目指し、有機材料や遷移金属ダイカルコゲナイドと呼ばれる原子1層の超薄膜材料を用いて、高性能な発光素子の開発に取り組みました。特に、電解質の最適化とパルス電圧を組み合わせることで、毎平方センチメートルあたり100万アンペアを超える高電流を安定して印加する技術を確立しました。これは様々な材料を用いた「電流励起レーザー」の実現に向けた重要な成果です。今後は、従来の材料が限定されたレーザー装置に代わる低コストかつ柔軟な光源技術として、医療診断、次世代通信、環境センシングなど多様な分野への応用が期待されます。