Development of light trapping technique for organic photovoltaics using nano-order refractive index control

2021 Fiscal Year Final Research Report

• Project/Area Number: 17K05001
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Nanomaterials engineering
• Research Institution: Yamagata University
• Principal Investigator: Kubota Shigeru 山形大学, 大学院理工学研究科, 准教授 (60396588)
• Co-Investigator(Kenkyū-buntansha): 廣瀬 文彦 山形大学, 大学院理工学研究科, 教授 (50372339) ; 水野 潤 早稲田大学, ナノ・ライフ創新研究機構, 上級研究員(研究院教授) (60386737)
• Project Period (FY): 2017-04-01 – 2022-03-31
• Keywords: 有機太陽電池 / ナノ構造 / 光閉じ込め / 光学シミュレーション

Outline of Final Research Achievements

To improve the efficiency of organic photovoltaics, a light management technology by which the spatial distribution of reflective index is controlled with 3-dimensional nanostructures has been developed. In the study concerning a device that integrates a moth-eye nanostructure and high-refractive-index glass, it has been demonstrated from both optical simulations and experiments that a highly efficient light trapping has been achieved in a wide spectral region. In addition, a functional multi-layer coating on a moth-eye surface has been numerically examined to obtain a basis of the technique for enhancing the stability of antireflective performance.

Free Research Field

有機エレクトロニクス、数理工学

Academic Significance and Societal Importance of the Research Achievements

本研究の主な成果は、有機太陽電池の発電層に光を効率的に閉じ込めることで、発電性能を大幅に改良するための光制御法を明らかにしたことである。この成果は、次世代の低コスト太陽電池として注目される有機太陽電池の実用化に大きく資すると期待される。