| abstract |
Provided are pigment fine particles and liquid dispersions of a near-infrared absorbing material that achieve both invisibility and other physical properties that play an important role in optoelectronics such as a near-infrared absorbing filter, and a method for producing the same. The fine particles of vanadyl-2,3-naphthalocyanine having an average particle size of 0.5 μm or less, the fine particles comprising a solvent and a vanadyl-2,3-naphthalocyanine mixture, a cationic surfactant, A liquid dispersion in which the average particle size of vanadyl-2,3-naphthalocyanine is dispersed with at least one surfactant selected from anionic surfactants or nonionic surfactants, and the average particle size is 0.5 μm or less. Manufactured through. [Selection figure] None |