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CN-121975521-A - One-dimensional lead-based hybridized perovskite luminescent material, preparation method and application

CN121975521ACN 121975521 ACN121975521 ACN 121975521ACN-121975521-A

Abstract

The embodiment of the invention provides a one-dimensional lead-based hybrid perovskite luminescent material, a preparation method and application thereof, and relates to the technical field of luminescent materials. The chemical formula of the one-dimensional lead-based hybrid perovskite luminescent material is ABX 6 , wherein the A site is organic cation C 7 H 18 N + 、C 13 H 26 N + , the B site is metal ion Pb 2+ , and X is halogen ion Br ‑ or I ‑ . The one-dimensional lead-based hybrid perovskite luminescent material provided by the embodiment of the invention shows remarkable and repeatable temperature dependence of fluorescence lifetime in a low-temperature interval of 80K to 200K, and the fluorescence lifetime has good response characteristic along with temperature change, so that high-precision optical temperature measurement can be realized based on the fluorescence lifetime.

Inventors

  • LIU ZHEN
  • YIN XUEFENG
  • CUI JIASHUO
  • PU SHIPING
  • WANG HAN
  • PENG TENGFEI
  • CHEN YONGQING
  • Shao Kairan
  • YAO SHUNYU
  • ZHAO YONG
  • ZHU DONGPO
  • TANG QI
  • Bai Yongrui
  • TANG JINGYA
  • YANG GANG
  • QUAN BINGJIE

Assignees

  • 国网河南省电力公司郑州供电公司

Dates

Publication Date
20260505
Application Date
20251231

Claims (9)

  1. 1. The one-dimensional lead-based hybrid perovskite luminescent material is characterized by having a chemical formula of ABX 6 , wherein A is an organic cation C 7 H 18 N + 、C 13 H 26 N + , B is a metal ion Pb 2+ , and X is a halogen ion Br - or I - .
  2. 2. The one-dimensional lead-based hybrid perovskite light-emitting material according to claim 1, wherein ABX 6 is octahedron, a one-dimensional chain structure is formed by sharing X - ions on an equatorial plane, and extends along a c-axis direction, and a site interacts with an inorganic frame BX 6 through hydrogen bond to support stabilization of the one-dimensional chain structure.
  3. 3. The one-dimensional lead-based hybrid perovskite light-emitting material according to claim 1, wherein ABX 6 is selected from (C 7 H 18 N)PbI 3 、(C 13 H 26 )PbI 3 、 (C 7 H 18 N)PbBr 3 or (C 13 H 26 )PbBr 3 ; the spatial group of (C 7 H 18 N)PbI 3 、(C 13 H 26 )PbI 3 、(C 7 H 18 N)PbBr 3 and (C 13 H 26 )PbBr 3 ) is Pna21, cc, P21/C in this order.
  4. 4. A method for preparing a one-dimensional lead-based hybrid perovskite light-emitting material according to any one of claims 1 to 3, comprising the steps of: Adding N-butyl trimethylammonium chloride or N, N-dicyclohexylmethylamine and B-site metal halide into halogen acid, heating and stirring until the mixture is completely dissolved to obtain a precursor solution; wherein the B-site metal halide is PbBr 2 or PbI 2 , the halogen acid is hydrobromic acid or hydroiodic acid, and phosphorous acid is added into a PbI 2 system.
  5. 5. The process according to claim 4, wherein the molar ratio of N-butyltrimethylammonium chloride or N, N-dicyclohexylmethylamine to the metal halide in the B-position is 1:1-1.5.
  6. 6. The method according to claim 4, wherein the temperature of the heating dissolution is 90 to 95 ℃.
  7. 7. The method according to claim 6, wherein the temperature-lowering crystallization is carried out at a rate of 1.3 to 1.5 ℃ per hour to 20 to 25 ℃.
  8. 8. The method of claim 7, wherein the precursor solution is maintained at a constant temperature for 200-220 minutes prior to the cooling crystallization.
  9. 9. A one-dimensional lead-based hybrid perovskite luminescent material according to any one of claims 1 to 3 and use of the one-dimensional lead-based hybrid perovskite luminescent material prepared by the preparation method according to any one of claims 4 to 8 in fluorescence temperature measurement.

Description

One-dimensional lead-based hybridized perovskite luminescent material, preparation method and application Technical Field The invention relates to the technical field of luminescent materials, in particular to a one-dimensional lead-based hybrid perovskite luminescent material, a preparation method and application thereof. Background Organic-inorganic hybrid perovskite materials have gained wide attention and application in the fields of photoelectric devices, photocatalysis, lasers, temperature and optical sensors and the like in recent decades due to their excellent optical, electrical and chemical properties. Such materials have structural versatility, ease of solution processing, and regulatable optoelectronic properties, and particularly exhibit significant advantages in terms of Photoluminescence (PL), electroluminescence (EL), and fluorescence lifetime responses, and are thus considered ideal candidates for developing high performance temperature sensors and other optical sensing platforms. In an electric power system, a superconducting power device, an liquefied natural gas transmission and distribution facility, outdoor electric equipment in a alpine region and the like are always under ultralow temperature or cryogenic working conditions, and the temperature states of key parts such as cable joints and the like are directly related to the safety and reliability of the system operation. However, in such an extremely low temperature environment, the conventional contact temperature sensor (such as a thermocouple, a thermal resistor and the like) generally has the problems of low response speed, low measurement precision, easiness in strong electromagnetic interference, difficulty in installation and the like, and is difficult to realize reliable, real-time and high-precision monitoring of the temperature. Along with the continuous improvement of the power equipment to the safe operation requirement under extreme environment, the actual requirements of accurate, stable and long-term monitoring are difficult to meet in the prior temperature measurement technology from deep cooling to low temperature. Disclosure of Invention In order to solve the technical problems in the prior art, the embodiment of the invention provides a one-dimensional lead-based hybrid perovskite luminescent material, a preparation method and application. The technical scheme is as follows: The invention provides a one-dimensional lead-based hybrid perovskite luminescent material, which has a chemical formula of ABX 6, wherein A is an organic cation C 7H18N+、C13H26N+, B is a metal ion Pb 2+, and X is a halogen ion Br - or I -. Optionally, ABX 6 is octahedral, forms a one-dimensional chain structure by sharing X - ions on the equatorial plane and extends along the c-axis direction, and a supports stabilization of the one-dimensional chain structure by hydrogen bonding interacting with inorganic framework BX 6. Optionally, the ABX 6 is selected from (C7H18N)PbI3、(C13H26)PbI3、(C7H18N)PbBr3 or (C 13H26)PbBr3; the spatial group of (C7H18N)PbI3、(C13H26)PbI3、 (C7H18N)PbBr3 and (C 13H26)PbBr3) is Pna21, cc, P21/C in that order. The luminescent material has a typical perovskite crystal structure, wherein organic cations interact with an inorganic lead halide frame through hydrogen bonds, so that the structural stability of the crystal is effectively enhanced, and the optical performance of the crystal is synergistically optimized. The ultraviolet-visible absorption spectrum test results show that (C 7H18N)PbI3 and (C 13H26)PbI3) have lower optical band gap and show remarkable light absorption capacity in the ultraviolet region, so that the ultraviolet-visible absorption spectrum test results are suitable for ultraviolet light detectors or temperature sensing and other applications, and (C 7H18N)PbBr3 and (C 13H26)PbBr3) have wider band gap and stronger ultraviolet absorption characteristics and are more suitable for high-energy photon detection and other high-performance optical devices. Further studies have shown that in the low temperature range of 80-200K, (C 7H18N)PbI3 and (C 7H18N)PbBr3) exhibit a high sensitivity of fluorescence lifetime to temperature changes: the characteristic fully proves the superior performance of the two materials as low-temperature fluorescence temperature sensing materials, the one-dimensional lead-based hybrid perovskite materials can realize high-sensitivity and high-precision temperature response in a low-temperature environment due to the strong and stable fluorescence lifetime-temperature dependence, the band gap and fluorescence lifetime characteristics of four one-dimensional lead-based hybridized perovskite materials are studied, and the materials can be selected according to requirements in practical application by combining the band gap, fluorescence lifetime and ultraviolet absorption capability, so that the optimal temperature monitoring performance is realized. The materials provide a feasible