Development of organic/inorganic hybrid optical devices using molecular doped organic single crystal activelayer

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K22147
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 30:Applied physics and engineering and related fields
• Research Institution: Sophia University
• Principal Investigator: Kikuchi Akihiko 上智大学, 理工学部, 教授 (90266073)
• Project Period (FY): 2019-06-28 – 2023-03-31
• Keywords: 有機単結晶 / 結晶成長 / 分子ドーピング / 光デバイス / 有機無機複合デバイス / 静電塗布 / 窒化物半導体 / ナノ光構造

Outline of Final Research Achievements

In this study, we aim to develop hybrid optical device technology using molecularly doped organic semiconductor single crystal and inorganic semiconductors. The research results are follows: (1) developing in-plane doping control techniques for plate-like organic single crystals using electro-spray and low vapor pressure thin liquid films, (2) understanding energy transfer mechanisms in co-doping and emission enhancement phenomena in organic single crystals (3) fabrication of organic (BP3T)/inorganic (GaN) composite LEDs by micro-gap sublimation method, (4) observation of ASE and optical degradation properties of single crystal and amorphous organic semiconductors, (5) fabrication of organic-inorganic hybrid perovskite single crystal arrays, (6) development of organic-inorganic hybrid nanostructure integrated optical device platform technology. The research on the molecularly doped organic semiconductor was completed with getting better-than-expected results.

Free Research Field

工学

Academic Significance and Societal Importance of the Research Achievements

本研究により、デバイス応用に適した薄板状有機単結晶の成長や分子ドーピングに適用可能な新しい結晶成長技術が複数提案され、分子ドーピングの面内プロファイル制御や、アシストドーパントによる発光増強効果、有機単結晶が非晶質膜に比べASE閾値や光劣化耐性に優れることなどの実証を行い、有機単結晶と分子ドーピングに関する多様な新しい知見を得たことに大きな学術的意義を有する。また、有機半導体単結晶と分子ドーピング技術、無機半導体ナノ構造を組み合せた新しい高機能性光デバイスの可能性を示したことに社会的意義を有するといえる。