Fabrication of Scalable Indoor Light Energy Harvester and Study for Agricultural IoT Applications

[摘要] A scalable indoor light energy harvester was fabricated by microelectromechanical system (MEMS) and printing hybrid technology and evaluated for agricultural IoT applications under different environmental input power density conditions, such as outdoor farming under the sun, greenhouse farming under scattered lighting, and a plant factory under LEDs. We fabricated and evaluated a dye- sensitized-type solar cell (DSC) as a low cost and "scalable" optical harvester device. We developed a transparent conductive oxide (TCO)-less process with a honeycomb metal mesh substrate fabricated by MEMS technology. In terms of the electrical and optical properties, we achieved scalable harvester output power by cell area sizing. Second, we evaluated the dependence of the input power scalable characteristics on the input light intensity, spectrum distribution, and light inlet direction angle, because harvested environmental input power is unstable. The TiO2fabrication relied on nanoimprint technology, which was designed for optical optimization and fabrication, and we confirmed that the harvesters are robust to a variety of environments. Finally, we studied optical energy harvesting applications for agricultural IoT systems. These scalable indoor light harvesters could be used in many applications and situations in smart agriculture.

[发布机构] Business Development Project, LAPIS Semiconductor Co., Ltd., Yokohama, Japan^1;Device Technology Division, LAPIS Semiconductor MIYAGI Co., Ltd., Furukawa, Japan^2;Electrical and Electronic Engineering, Shizuoka University, Hamamatsu, Japan^3

[效力级别] 能源学

[关键词] Electrical and optical properties;Hybrid technology;Microelectromechanical system (MEMS);Nanoimprint technology;Optical optimization;Smart agricultures;Spectrum distribution;Transparent conductive oxides