Flexible Visible Photodonductive Sensor with Ag2S Thin Film and Metal Nanoparticles by Wet Process

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K04524
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 21060:Electron device and electronic equipment-related
• Research Institution: Tokyo Metropolitan Industrial Technology Research Institute
• Principal Investigator: Ebisawa Mizue 地方独立行政法人東京都立産業技術研究センター, 開発本部マテリアル応用技術部材料技術グループ, 上席研究員 (00510893)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 光導電 / 薄膜応用 / 硫化銀 / センサ

Outline of Final Research Achievements

We focused on thin film composed of Ag2S and Ag nanostructures as a replacement for CdS cell and a flexible sensor material. On change process of Ag(conductor) to Ag2S(semiconductor), photoconductivity changed by Ag residual rate and photocurrent about 20dB at Ag residual rate about 10% was obtained by white LED irradiation. Moreover, photo current increase by Ag2S films supported Ag nanoparticle indicated the possibility that supported Ag nanoparticle realized equivalent effect of residual Ag optimization.

Free Research Field

光応用

Academic Significance and Societal Importance of the Research Achievements

光導電性が得られた硫化銀と銀から成る薄膜は室温付近で成膜可能なことから，市販のシート状フィルムにもセンサ機能を持たせることができる．また，塗装や印刷など湿式プロセスで完結することも可能なため，性能を安定化する成膜処理方法を確立すれば，これらに関わる産業界に対して付加価値の高い応用技術の展開が期待できる