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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

This invention describes a new way to use parts of a material called ABC perovskite to control the transmission of light in a device called a light valve. This material has non-spherical shapes, like nanowires or nanorods, and is suspended in a liquid to form a light valve. The liquid is made up of mineral, synthetic, or vegetable oil, and the device has a transparent electrode that allows light to pass through. The invention provides a new use for a material that was previously thought to have limited uses, and a new device that can control the movement of light.

Problems solved by technology

However, in the prior art, there is no technology involving making light valves using ABX3 perovskite materials.

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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