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2021 Fiscal Year Final Research Report

Innovation of Three Primary Colors Emitting Devices by Nanocolumn Crystals

Research Project

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Project/Area Number 19H00874
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 30:Applied physics and engineering and related fields
Research InstitutionSophia University

Principal Investigator

KISHINO Katsumi  上智大学, 上智大学, 教授 (90134824)

Co-Investigator(Kenkyū-buntansha) 野村 一郎  上智大学, 理工学部, 教授 (00266074)
大音 隆男  山形大学, 大学院理工学研究科, 助教 (20749931)
富樫 理恵  上智大学, 理工学部, 助教 (50444112)
山口 智広  工学院大学, 先進工学部, 教授 (50454517)
Project Period (FY) 2019-04-01 – 2022-03-31
Keywords三原色集積型光デバイス / ナノコラム / InGaN / LED / レーザ
Outline of Final Research Achievements

Nanocolumns are one-dimensional nanocrystals; based on the emission color control mechanism by nanocolumn diameter in InGaN/GaN ordered nanocolumn arrays, we fabricated two dimensional arrangement of InGaN LEDs with ultra fine emission areas, in which the monolithic integration of red, green, blue and yellow emissions micro-LEDs into a micro region was achieved. Furthermore, we got the success of multicolor integrated nanocolumn LEDs with the high radiation directionality; using the Ag-based plasmonic crystals based on the periodicity of nanocolumn arrays, we got the severalfold photoluminescence enhancement ratio in the red emission range, which lead way toward the high efficiency of red InGaN nanocolumns. The research results effect a miniaturization of video panels, which will contribute to the development of the next generation display such as VR, AR and so on.

Free Research Field

光エレクトロニクス

Academic Significance and Societal Importance of the Research Achievements

VR、ARなど次世代ディスプレイは大きな社会変革をもたらすが、それに適合する映像パネルでは10μmサイズ以下のマイクロLEDを二次元配列技術の開拓が必要である。それに対する一つの解決法として、InGaN/GaNナノコラムによって発光面積5×5μm2のLEDを周期10μmで二次元配列させ、集積型μLED画素ユニットで赤、緑、青、黄色発光を実証した。
放射ビーム指向性の高いLEDの多色発光集積化を実現して新たな発光デバイス領域を拓き、さらにナノコラム周期効果を用いることで、プラズモニクス金属としてはAuではなくAgが赤色域発光増強に有効であることを示して、従来のプラズモニクス分野の常識を革新した。

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Published: 2023-01-30  

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