KHẢO SÁT ĐIỀU KIỆN TỔNG HỢP, ĐÁNH GIÁ CẤU TRÚC VÀ KHẢNĂNG PHÁT QUANG CỦA VẬT LIỆU PEROVSKITE LAI CƠ KIM CHÌ HALOGEN HAI CHIỀU PHA DION-JACOBSON CHỨA GỐC DIAMIN

Tóm tắt

In this study, the crystalline 1,5-diaminonaphthalene lead iodide [C10H6(NH3)2]PbI4 (DANPI) was
investigated for synthesis conditions in two methods: (i) crystallization in the above-mentioned solution,
and (ii) crystallization in a solution with temperature gradients. Optical microscopy and powder X-ray
diffraction (XRD) was used to evaluate crystal structure, and the luminescence of the formed crystals
was determined by photoluminescence spectroscopy (PL). The results showed that DANPI crystals were
formed in the solution with temperature gradients but no crystals were formed using the method of
decreasing temperature. Observed under an optical microscope, the obtained crystals are orange in
color, about 200 µm in size, almost square in shape, with sharp crystal edges, and thin plates. The XRD
data showed that obtained DANPI crystal has a monoclinic (monoclinic) lattice type, space group P21c
(14) with lattice parameters a, b, c are 11.2252 Å , 8,9337 Å, 8,7750 Å, respectively, and α = γ = 90o
, β
= 90,601o
. The PL spectrum showed that the material was capable of emitting in the 520 nm to 550 nm
region, corresponding to the green color.