LIGHTING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a lighting device using specific Prussian blue type metal complex ultrafine particles, configured to improve luminance transmittance or durability.SOLUTION: A Prussian blue type metal complex contained in an electrochemical responding material layer [LA1] is an iron-nickel (Fe-Ni)-iron (Fe) Prussian blue type metal complex. A molar ratio of the constituent components is iron (Fe) at 20-60% and nickel (Ni) at 40-80%. The Prussian blue type metal complex contained in an auxiliary electrochemical responding material layer [LA2] is a zinc (Zn)-iron (Fe) Prussian blue type complex.