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Organic-inorganic two-dimensional perovskite room-temperature phosphorescent material as well as preparation method and application thereof

A room temperature phosphorescence and perovskite technology, applied in the preparation of organic compounds, luminescent materials, organic chemistry, etc., can solve the problems of oxygen collision quenching, low luminescence quantum efficiency, low intersystem crossing rate, etc., and achieve good stability. , the synthesis method is simple, the raw material price is cheap

Active Publication Date: 2021-06-18
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, it is relatively difficult for pure organic small molecules to generate ultra-long room temperature phosphorescence. The main reasons are: the low intersystem crossing rate, the radiative transition from the triplet excited state to the singlet ground state (phosphorescence) is spin-forbidden, and the resulting triplet excitation state is extremely prone to non-radiative relaxation and quenching by oxygen collisions
The organic long afterglow materials have short lifetime and low luminous quantum efficiency, which greatly limits the application of materials. Therefore, it is very urgent to design and synthesize long afterglow materials with long life and high efficiency.

Method used

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  • Organic-inorganic two-dimensional perovskite room-temperature phosphorescent material as well as preparation method and application thereof
  • Organic-inorganic two-dimensional perovskite room-temperature phosphorescent material as well as preparation method and application thereof
  • Organic-inorganic two-dimensional perovskite room-temperature phosphorescent material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This example uses PbCl 2 and 3-methoxyphenethylamine to prepare organic-inorganic two-dimensional perovskite room temperature phosphorescent materials, the target product is denoted as: (3MeO-PEA) 2 PbCl 4 .

[0033] Wherein, the structural formula of 3-methoxyphenethylamine is:

[0034] The synthesis process of the organic-inorganic two-dimensional perovskite room temperature phosphorescent material in this embodiment includes the following steps:

[0035] Step 1, under the protection of an inert atmosphere, weigh 0.1112g (0.4mmol) PbCl 2 1. Draw 117ul (0.8mmol) of 3-methoxyphenethylamine into a two-necked bottle with a pipette gun, add 3ml of ethanol and 300ul (3.6mmol) of concentrated hydrochloric acid.

[0036] Step 2: Connect a condenser tube and condensed water to the two-necked bottle, heat and stir at 90° C. for 1.5 h.

[0037] Step 3: After all the reactants are dissolved, transfer the reaction solution to a sample bottle and cool slowly; wash the precip...

Embodiment 2

[0041] This example uses PbCl 2 and 4-methoxyphenethylamine to prepare organic-inorganic two-dimensional perovskite room temperature phosphorescent materials, the target product is denoted as: (4MeO-PEA) 2 PbCl 4 .

[0042] Wherein, the structural formula of 4-methoxyphenethylamine is:

[0043]The synthesis process of the organic-inorganic two-dimensional perovskite room temperature phosphorescent material in this embodiment includes the following steps:

[0044] Step 1, under the protection of an inert atmosphere, weigh 0.1112g (0.4mmol) PbCl 2 1. Draw 118ul (0.8mmol) of 4-methoxyphenethylamine into a two-necked bottle with a pipette gun, add 3ml of ethanol and 300ul (3.6mmol) of concentrated hydrochloric acid.

[0045] Step 2: Connect a condenser tube and condensed water to the two-necked bottle, heat and stir at 90° C. for 1.5 h.

[0046] Step 3: After all the reactants are dissolved, transfer the reaction solution to a sample bottle and cool slowly; wash the precipi...

Embodiment 3

[0060] The raw materials and synthesis process of this embodiment are basically the same as in Example 1, the difference is that PbCl 2 The molar ratio of 3-methoxyphenethylamine and concentrated hydrochloric acid is 1:1:8, and the volume ratio of concentrated hydrochloric acid and ethanol is 1:11. After mixing, heat and stir at 100°C for 1 hour. The test found that the luminous effect of the two-dimensional perovskite room-temperature phosphorescent material of this embodiment is consistent with that of Embodiment 1.

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Abstract

The invention discloses an organic-inorganic two-dimensional perovskite room-temperature phosphorescent material as well as a preparation method and application thereof, and the organic-inorganic two-dimensional perovskite room-temperature phosphorescent material with long afterglow luminescence performance is synthesized by selecting an organic layer with a strong electron-donating group and an inorganic layer with a relatively strong rigid structure through molecular design. The two-dimensional perovskite room-temperature phosphorescent material disclosed by the invention has the advantages of low raw material price, simple synthesis method, capability of continuously emitting light for several seconds after an excitation light source is turned off, and the like. The material has wide potential application value in the fields of anti-counterfeiting encryption, photoelectric materials and the like, and is expected to be applied to the fields of anti-counterfeiting encryption, electroluminescent devices and the like.

Description

technical field [0001] The invention relates to a luminescent material, in particular to a phosphorescent material and its preparation method and application. Background technique [0002] Afterglow materials have long-lasting luminescence ability after stopping photoexcitation, so they have a wide range of applications in optical storage, chemical sensing, biological imaging, biological detection and other fields. Compared with inorganic long-afterglow materials, organic afterglow materials with phosphorescence lifetimes exceeding 100 ms have the advantages of lower production costs, diverse synthesis processes, tunable luminescent properties, and good compatibility with various substrates. [0003] However, it is relatively difficult for pure organic small molecules to generate ultra-long room temperature phosphorescence. The main reasons are: the low intersystem crossing rate, the radiative transition from the triplet excited state to the singlet ground state (phosphoresc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66C09K11/06C07C217/60C07C213/10C07C213/00
CPCC09K11/06C09K11/664C07C213/00C07C213/10C07C217/60
Inventor 吕文珍葛磊陈润锋
Owner NANJING UNIV OF POSTS & TELECOMM
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