Growth of KH₂PO₄ crystals activated by organic phosphors

The conditions for growth of single crystals of potassium dihydrogen phosphate KH₂PO₄ activated by organic phosphors were investigated. Aqueous solutions of derivatives of naphthalic and perylenetetracar-boxylic acids were used as activators. A possible scheme of coherent matching of crystallochemical parameters of the KH₂PO ₄ lattice with an organic activator molecule is proposed. The excitation and photoluminescence spectra of the activated crystals are measured in the range 200-600 nm. It is ascertained that the luminescence is related to the presence of organic phosphors in the KH₂PO₄ lattice.