Dopant effect on the optical and thermal properties of the 2D organic–inorganic hybrid perovskite (HDA)₂PbBr₄

Abstract

Lead-based two-dimensional organic - inorganic hybrid perovskites (2D HOIPs) are a kind of popular materials with various optical properties, which can be tuned through metal ions doping. Due to the...

Optical Property Regulation through Host–Guest Interaction in a Zero-Dimensional Zr Chloride

“…However, the Mn-doping induces an intense red emission at 650 nm under different excitation wavelengths from 267 to 532 nm (Figure b). The PLE peaks of 267, 317, 335, 440, and 532 nm should have the contribution from the transitions of 6 A 1 ( 6 S) → 4 T 2 (F) (250–299 nm), 6 A 1 → 4 T 1 ( 4 P) (300–330 nm), 6 A 1 → 4 E­( 4 D) (331–400 nm), 4 E­( 4 G) (401–480 nm), and 6 A 1 → 4 T 1 ( 4 G) (481–550 nm), respectively, in Mn 2+ . ,, The excitation-independent PL in Mn 2+ @[(CH 3 ) 3 SO] 2 ZrCl 6 should be due to the strong interaction between the host [(CH 3 ) 3 SO] 2 ZrCl 6 and Mn 2+ dopant ions. Therefore, the energy transfers completely from the host to the guest ions, leading to the sole Mn 2+ emission ( 4 T 1 ( 4 G) → 6 A 1 ( 6 S)).…”

“…For example, A 2 SnCl 6 (e.g., Cs 2 SnCl 6 , (NH 4 ) 2 SnCl 6 , [(CH 3 ) 3 S] 2 SnCl 6 ·H 2 O and [(CH 3 ) 4 N] 2 SnCl 6 , ) stand out as popular host materials capable of accommodating various guest ions for luminescence applications. When doped with ns 2 electrons (e.g., Sb 3+ , Bi 3+ , and Te 4+ ), A 2 SnCl 6 can exhibit diverse luminescent colors attributing to the unique electron configurations of these dopants, which provides the opportunity for color combination through multidoping. − Recently, Zr-based halides perovskites A 2 ZrX 6 have emerged as promising alternatives with interesting intrinsic emissions. , By element doping, the optical properties of A 2 ZrX 6 can be easily controlled. For example, the optical performance of Cs 2 ZrBr x Cl 6– x nanocrystals can achieve tunable emission wavelengths from 503 to 563 nm by varying the ratio of hybrid halide ions .…”