Halide ABX3 perovskite particles and their application in controlling photo-flux

a technology of perovskite particles and light control valves, which is applied in the direction of lead halides, rubidium/caesium/francium compounds, instruments, etc., can solve the problem of no technology involving light control valves using abx/sub>3 perovskite materials

Inactive Publication Date: 2020-01-16
ZHEJIANG JINGYI NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]This invention presents the method to use ABX3 perovskite particles to control the flux of light in a light control device, or referred as a light valve. The present invention provides a new use of the ABX3 perovskite material, and method to make such a material. The present invention further provides a light valve, comprising a liquid suspension having such a material of ABX3 perovskite material, which can electronically control transmission of light. M...

Problems solved by technology

However, in the prior art, there is no technology inv...

Method used

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  • Halide ABX3 perovskite particles and their application in controlling photo-flux
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  • Halide ABX3 perovskite particles and their application in controlling photo-flux

Examples

Experimental program
Comparison scheme
Effect test

example 1 preparation

of Cs-Oleate

[0023]Cs2CO3 (4.07 g) was loaded into a 250 mL, 3-neck flask along with octadecene (50 mL, ODE) and oleic acid (11.088 g), and the mixture was dried for 1 h at 120° C. and then heated under Ar to 150° C. until all Cs2CO3 reacted with oleic acid. Since Cs-Oleate precipitates out of ODE at room temperature, it has to be preheated to make it soluble before usage.

Example 2 Synthesis of CsPbI3 Nanorods

[0024]N, N-dimethylformamide (100 mL, DMF) and PbI2 2.306 (5 mmol) were loaded into a 250 mL flask. Acetate acid 4.654 g (77.5 mmol) and dodecylamine 0.797 g (4.3 mmol) were added. After complete solubilization of PbI2, 5 mL Cs-Oleate solution was added (prepared as described Example 1). Then, the hybrid solution was added into a 5 L flask along with 4200 mL toluene.

[0025]Then, centrifuge the reaction solution at 5000 G for 1.5 hours and discard the supernatant to yield the light control CsPbI3.

[0026]Then, the CsPbI3 were further dispersed with 500 mL of toluene, mixed well with...

example 6

LV Devices Made from LV Suspension-Example-4

[0030]In this example, a wet thickness of 200 um of the LV Suspension-Example 4 made in Example 4 was sealed between two transparent electrodes of ITO conductive glass using epoxy resin to produce a light valve referring as LV Device-6. When no electric voltage is applied (OFF State), LV Device-6 exhibits an orange tint and light transmission is measured to be 4.7%. When it was electrically activated using 220 Volts AC at 50 Hz (ON State), the LV Device-6 turns clearer and light transmission is measured to be 25.6%. FIG. 2 presents the absorption spectrum of LV Device-6 at OFF state and ON state respectively.

example 7

LV Devices Made from LV Suspension-Example-5

[0031]In this example, a wet thickness of 180 um of the LV Suspension-Example 5 made in Example 5 was sealed between two transparent electrodes of ITO conductive glass using epoxy resin to produce a light valve referring as LV Device-7. When no electric voltage is applied (OFF State), LV Device-7 exhibits an orange tint and light transmission is measured to be 6.4%. When it was electrically activated using 220 Volts AC at 50 Hz (ON State), the LV Device-7 turns clearer and light transmission is measured to be 30.2%.

TABLE 1Typical performance of LV devicesTransmittance %LV DeviceOff stateOn stateLV Device-64.725.6LV Device-76.430.2

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PUM

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Abstract

The present invention provides a light valve containing ABX3 perovskite particles; more specifically is related to a light valve containing halide ABX3 perovskite particles that can control light transmittance. The preferable halide ABX3 perovskite particles in this invention consist of A being at least one of Cs+, CH3NH3+, and Rb+, B being at least one of Pb2+, Ge2+, and Sn2+, and X being at least one of Cl−, Br−, and I−. This kind of halide ABX3 perovskite particles were suspended in a liquid suspension to make a light valve with a light transmittance control, which discloses a completely new application for ABX3 perovskite materials.

Description

TECHNICAL FIELD[0001]The present invention is related to ABX3 perovskite particles and a light valve, more specifically is related to the halide ABX3 perovskite particles and a light control valve that can control the light transmission, and such a device is preferably used for windows, lenses, or a light shutter such as a sunroof. The fascinating multifunctional smart windows exhibit promising features for a wide range of applications in buildings, airplanes, automobiles, etc. The present invention provides a new use for halide ABX3 perovskite material.BACKGROUND ART[0002]This invention presents the method to use halide ABX3 perovskite particles to control the flux of light in a light control device, or referred as a light valve. Technically, a light valve is a device that can regulate the amount of light passing through a media like a water valve that can control the water flow. Window shade can be viewed as a light valve too. However, in this invention, the light valve is referre...

Claims

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Application Information

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IPC IPC(8): C01D17/00G02F1/155G02F1/17
CPCB82Y30/00C01P2002/34C01P2004/64G02F1/155G02F1/172C01P2004/16C01D17/003B82Y20/00C01G21/006C01G19/006C01G17/006G02F2202/36Y02E10/549G02F1/169C01D17/00C01G17/04C01G19/04C01G21/16
Inventor LI, YANANZHANG, DAWEIZHAO, SHIYONGXIAO, SHUYONG
Owner ZHEJIANG JINGYI NEW MATERIAL TECH CO LTD
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