Luminescent properties of Pb2MoO5 single crystals

• The Pb2MoO5 crystals of high optical quality were grown by the LTG CZ technique.
• The intrinsic emission at 600 nm is ascribed to excitons, self-trapped at MoO4.
• Shallow traps are responsible for the worsening of light output at T < 15 K.

Lanarkite type Pb2MoO5 single crystals were grown using low temperature gradient Czochralski technique and their optical and luminescent properties were studied. The luminescence band at 590–600 nm was observed under UV and X-ray excitations and ascribed to emission of self-trapped excitons. The band is thermally quenched at T > 15 K with the activation energy of process, Eact = 11 meV. The measurements of thermostimulated luminescence demonstrated the presence of shallow traps, which adversely influence the energy transfer to the emission centers.