NOVELTY - New solid or liquid material, having specified UV-visual spectral bands, infrared spectral bands, and resonance Raman spectral bands comprises a polyoxometallate of molybdenum, tungsten and vanadium having specific oxidation levels. The stability of the material is marked by, e.g. the behavior of the species against reducing/oxidizing agents with an electro-chemical potential of -0.44 (iron/ferrous) and +0.56 (maganese oxide).    USE - The molybdenum blue type material is useful in electronics and photochemistry; and in apparatuses and procedures such as equipment for the investigating solution species or solids where it acts as an analytical reagent, apparatus for electrolysis of solution species or solids, in solar cell prototype as photoactive electronic construction unit for the transformation of light energy into electricity, and in condenser prototype as electronic construction unit for storage of charge carriers (all claimed).    ADVANTAGE - The material is photochemically active, has semiconducting properties and can reversibly store electrons. The solar cell, which uses the material, has high efficiency to convert light energy to electrical energy and is sensitive to broad spectral bands and absorbs light with high intensity.    DETAILED DESCRIPTION - New solid or liquid material comprises a polyoxometallate of molybdenum, tungsten and vanadium with oxidation levels of 5.5-6 for molybdenum, 5.5-6 for tungsten and 4-5 for vanadium. The material has UV-visual spectral bands of 1200 nm, 700 nm or 300 nm; infrared spectral bands of 3400 cm-1, 3180 cm-1, 1610 cm-1, 967 cm-1, 729 cm-1, 636 cm-1 or 551 cm-1; and resonance Raman spectral bands of 1064 cm-1, 800 cm-1, 530 cm-1, 460 cm-1, 330 cm-1 or 210 cm-1. The stability of the material is marked by: the behavior of the species against reducing/oxidizing agents with an electro-chemical potential of -0.44 (iron/ferrous) and +0.56 (maganese oxide, MnO4-), a pH of 1-6 in aqueous solution, solubility in solvents such as water, low alcohol, methanol to butanol, isopropanol or acetone, and the concentration range of the species of 1 mmol/l to 1 mol/l for molybdenum.    An INDEPENDENT CLAIM is included for the preparation of the solid material.