Growth and characterization of pure, Se and As doped ZTS crystals

Thiourea zinc sulfate (ZTS) crystal is a nonlinear optical material that has excellent performance, but the growth of ZTS crystal with high quality and large size is difficult. In this work, we calculated the dropping curve of temperature in ZTS crystal growth and used the aqueous solution slow-cooling method to grow pure, Se doped and As doped crystals. After the doping of Se/As, the external morphology and lattice parameters changed, and the cell volume increased slightly. The decomposition temperature and hardness of Se/As doped crystals increase, indicating that thermostability and machinability are improved. The light transmittance of pure ZTS crystal is well and Se doped crystal is better, but As doped crystal is worse. The nonlinear optical property of ZTS crystal was studied by the powder frequency-doubling experiment.