| abstract |
The invention discloses a double halogen hybrid perovskite crystal material for rare earth doped radiation detector, the chemical formula is CH 3 NH 3 (Pb x Tm 1-x )(Br y I 1-y ) 3 , wherein x =0.91, y=0.451-1, the material has stable performance, good resistivity and low leakage current, the resistivity can reach 4.79×10 8 Ω·cm, and the leakage current can reach 56nA; the invention also provides The preparation method of the crystal material comprises the steps of configuring and mixing a precursor liquid containing bromine and iodine elements to form a mixed liquid, mixing rare earth oxide Tm 2 O 3 into the mixed liquid, filtering and heating it in a heating water tank The crystal is grown, and the crystal material is obtained after drying. The preparation process is simple and the process is easy to control. During the crystal growth process, the three-stage temperature rise control method makes the crystal growth process stable. |