Development of spectra converter for photosynthesis that brings innovation to agriculture

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H04619
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental agriculture(including landscape science)
• Research Institution: Ehime University
• Principal Investigator: Matsue Naoto 愛媛大学, 農学研究科, 教授 (90199753)
• Co-Investigator(Kenkyū-buntansha): 青野 宏通 愛媛大学, 理工学研究科(工学系), 教授 (00184052)
• Research Collaborator: ERNI Johan
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 蛍光体 / スペクトルコンバータ / 紫外線吸収 / 可視光線放出

Outline of Final Research Achievements

Luminescent materials without containing rare-earth elements, silver ion-containing zeolites, that absorb ultraviolet rays and emit visible lights have been developed; the materials may serve to increase the amount of solar radiation for photosynthesis. Among the zeolite species tested, X- and Y-type zeolites showed strong luminescence. The coexistence of cations other than silver increased the fluorescence intensity; the coexistence of zinc ion in X type zeolite and coexistence of both barium ion and lithium ion in Y type zeolite was optimal. The fluorescence intensity at this time was higher than the commercially available YAG. In Y type zeolite, lower silver content showed higher luminescence . We also succeeded in producing nano-sized zeolites, but their fluorescence intensity was smaller than in the case of micron-sized zeolites. The coexistence of zinc ions and ammonium ions suppressed the oxidation reaction of the supported silver ions.

Free Research Field

環境土壌学