CN110511753A - A kind of preparation of the manganese ion doping chlorine lead caesium high stability perovskite quantum dot white light-emitting diode based on coated with silica - Google Patents

A kind of preparation of the manganese ion doping chlorine lead caesium high stability perovskite quantum dot white light-emitting diode based on coated with silica Download PDF

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CN110511753A
CN110511753A CN201910862517.4A CN201910862517A CN110511753A CN 110511753 A CN110511753 A CN 110511753A CN 201910862517 A CN201910862517 A CN 201910862517A CN 110511753 A CN110511753 A CN 110511753A
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solution
quantum dot
perovskite quantum
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刘自磊
李凤
魏加湖
黄高翔
黄彦
黄圆圆
曹镭清
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Nanchang Hangkong University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y20/00—Nanooptics, e.g. quantum optics or photonic crystals
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    • B82—NANOTECHNOLOGY
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    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/66—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing germanium, tin or lead
    • C09K11/664—Halogenides
    • C09K11/665—Halogenides with alkali or alkaline earth metals
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    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/115—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising active inorganic nanostructures, e.g. luminescent quantum dots
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/842—Containers
    • H10K50/8426—Peripheral sealing arrangements, e.g. adhesives, sealants
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

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Abstract

The preparation method of the invention discloses a kind of manganese ion doping chlorine lead caesium high stability perovskite quantum dot white light-emitting diode based on coated with silica, has synthesized the Mn with double emission peaks first2+Adulterate CsPbCl3Perovskite quantum dot, further using TMOS Hydrolyze method, TEOS Hydrolyze method and APTES Hydrolyze method later is perovskite quantum dot surface layer coated Si O2, the orange red Mn of the high stability that last use production obtains2+‑CsPbCl3/SiO2Luminescent material, combining with green fluorescent powder, has further made PWLED, realizes stable white luminous.Compared with as perovskite quantum dot produced by the present invention WPLED made by the perovskite quantum dot of naked leakage, which also shows better high temperature resistant, water resistance other than having the advantages that reduce toxic element-lead content.

Description

A kind of manganese ion doping chlorine lead caesium high stability perovskite based on coated with silica The preparation of quantum dot white light-emitting diode
Technical field
The present invention relates to perovskite quantum dot optoelectronic field of material technology, and in particular to a kind of based on coated with silica The preparation method of manganese ion doping chlorine lead caesium high stability perovskite quantum dot white light-emitting diode.
Background technique
In recent years, Ca-Ti ore type quantum dot (PQDs) is due to its photoluminescence quantum yield with higher, entirely may be used Adjustable narrow-band transmitting and excellent charge transport performance in light-exposed spectral limit, in photovoltaic, light emitting diode (LED) It is widely used with optoelectronic areas such as laser.Although at present both at home and abroad to CsPbX3(X=Cl, Br, I) quantum dot is made Research for color conversion fluorescent powder has made great progress, and optimizes the synthetic schemes of material, obtains the calcium of better performances Titanium ore quanta point material, but since its own is to water and oxygen sensitive, so that stability difference is become it and be difficult to the shortcomings that overcoming, This material is seriously constrained as the practical application on the devices such as luminescence generated by light, photovoltaic, especially for containing I-Red quantum Point has excessively poor ability in terms of high temperature resistant, resistance to moisture.
Therefore, in a recent study, people are dedicated to that more stable perovskite quantum dot is prepared by various methods.One Aspect, researcher is by the way that perovskite quantum dot to be mounted in organic/inorganic matrix or using polymer/silica to calcium Titanium ore quantum dot, which carries out cladding, makes it completely cut off oxygen and moisture in air；On the other hand, numerous studies have shown that Zn2+、Cd2+、 Sr2+、Ni2+、Sn2+And Mn2+Chemical composition, band structure and the photoelectric properties of the adjustable semiconductor nano of ion doping. And Mn in inorganic perovskite2+Doping can not only improve perovskite quantum dot luminescence generated by light yield, reduce caesium lead perovskite-like The use of middle toxic element lead, it is often more important that quantum dot stability in the environment can greatly be improved.Also, perovskite amount Mn in son point2+Orange red transmitting light can effectively replace I base red fluorescent powder.
Summary of the invention
Problem to be solved by this invention is: it is high steady to provide a kind of manganese ion doping chlorine lead caesium based on coated with silica The preparation method of qualitative perovskite quantum dot white light-emitting diode, by the calcium of perovskite quantum dot and naked leakage produced by the present invention WPLED made by titanium ore quantum dot is compared, and the light emitting diode is in addition to having the advantages that reduce toxic element-lead content Outside, better high temperature resistant, water resistance are also shown.
The present invention in order to solve the above problem provided by technical solution are as follows: a kind of manganese ion based on coated with silica is mixed The preparation method of miscellaneous chlorine lead caesium high stability perovskite quantum dot white light-emitting diode, the described method comprises the following steps,
(1), 0.25g cesium carbonate is weighed first to be fitted into 50mL there-necked flask, 10mL1- octadecylene, 1.5mL oil is then added Acid is passed through nitrogen after so that it is heated 30min under 120 DEG C of vacuum environment and is warming up to 150 DEG C, is finally cooled to 25 DEG C -30 It DEG C is stored in nitrogen environment, the first solution is made；
(2), it weighs 0.0556g lead chloride and 0.0828g manganese chloride is added to together in the there-necked flask of 25mL, be then added 5mL1- octadecylene, 1.5mLOA, 1.5mL oleyl amine, 1mL tri-n-octyl phosphine, are made the second solution；
(3), the second solution is heated to 120 DEG C under vacuum conditions, 30min is kept with this condition, is passed through nitrogen later Second solution is heated to 190 DEG C by gas, is taken the first solution of 1.2mL to inject rapidly at this temperature and is cooled to 30 DEG C -40 at once DEG C, third solution is made；
(4), third solution is divided into two parts and is put into 10mL centrifuge tube, is centrifuged using centrifuge agent with the revolving speed of 6500rpm 5min is removed supernatant, sediment in centrifuge tube is taken to be dissolved using 10mL toluene, and Mn is made2+The CsPbCl of doping3Perovskite amount Sub- point；
(5), by obtained 10mLMn2+The CsPbCl of doping3Perovskite quantum dot is put into the single port bottle of 25mL, is taken 100uL methyl silicate is injected into this single port bottle, this mixture is under 25 DEG C -30 DEG C of room temperature environment with the stirring of 800rpm rate The 4th solution is made in 8h；
(6), the 4th solution stirring after, be divided into two parts and be put into 10mL centrifuge tube, using centrifuge with The revolving speed of 10000rpm is centrifuged 10min；
(7), after step (6) are centrifuged, the supernatant in centrifuge tube is removed, sediment in pipe is placed in vacuum environment Middle drying simultaneously finally obtains SiO2The Mn of cladding2+The CsPbCl of doping3Perovskite quantum dot powder；
(8), 0.02gSiO is taken2The Mn of cladding2+The CsPbCl of doping3Perovskite quantum dot powder and 0.15g polystyrene It is placed in 50mL centrifuge tube, 10mL toluene is then added, mixing fullys shake using eddy mixer, the 5th solution is made；
(9), it takes 0.02g green emitting phosphor and 0.15g polystyrene to be placed in 50mL centrifuge tube, 10mL first is then added Mixing fullys shake using eddy mixer in benzene, and the 6th solution is made；
(10), the 5th solution and the 6th each 1mL of solution are taken respectively using two 1mL needle tubings, the 5th solution of 0.2mL is added dropwise extremely In blue-fluorescence lamp bead, lamp bead is then placed in 80 DEG C of baking ovens dry 20min；Lamp bead is taken out later, is cooled to room temperature to it The 6th solution of 0.1mL is added dropwise afterwards, completion of dropwise addition is placed in 80 DEG C of baking ovens dry 20min；
(11), to after drying, lamp bead cap be taken to cover lamp bead luminous component in step (10), preparation is completed.
Compared with prior art, the invention has the advantages that firstly, we are prepared for having synthesized Mn using hot injection method2+It mixes Miscellaneous CsPbCl2Perovskite quantum dot, by configuring a certain proportion of caesium presoma, and the Pb- being rapidly injected under high temperature Mn in the mixed solvent is precipitated perovskite precipitating by cooling rapidly, is then centrifuged for purification and obtains Mn:CsPbCl3, in synthesis process In temperature when can be injected by control lead-manganese ratio and heat control Mn2+The number of incorporation.Later, it uses TMOS Hydrolyze method, TEOS Hydrolyze method and APTES Hydrolyze method are Mn2+: CsPbCl3Surface coated Si O2.Finally, by made The reddish orange obtained luminous perovskite quantum dot and green emitting phosphor are dissolved in after toluene and uniformly applying respectively using polystyrene as carrier It overlays on the luminous small lamp bulb of bluish violet, obtains white luminescence generated by light perovskite light emitting diode with quantum dots after its drying.It closes There are double emission peaks at obtained perovskite quantum dot, respectively in 400nm or so and 600nm or so, shine in reddish orange.In Mn2+Doping and SiO2Under the double action of cladding, the stability of the perovskite quantum dot greatly improved.And pass through Mn2+It is right Pb2+Substitution, reduce the use of toxic element lead, develop perovskite quantum dot preferably towards environmentally protective direction.
Specific embodiment
Carry out the embodiment that the present invention will be described in detail below in conjunction with embodiment, whereby to the present invention how application technology hand Section solves technical problem and reaches the realization process of technical effect to fully understand and implement.
Embodiment 1: preferably specific implementation case (preparation of TMOS Hydrolyze method) of of the invention one.Its step are as follows:
1) 0.25g cesium carbonate (Cs is weighed first2CO3) be fitted into 50mL there-necked flask, then be added 10mL 1- octadecylene, 1.5mL oleic acid (OA) is passed through nitrogen after so that it is heated 30min under 120 DEG C of vacuum environment and is warming up to 150 DEG C, finally drops Temperature is stored in nitrogen environment to 25 DEG C -30 DEG C.The first solution is made.
2) 0.0556g lead chloride (PbCl is weighed2) and 0.0828g manganese chloride (MnCl2) it is added to the there-necked flask of 25mL together In, 5mL 1- octadecylene, 1.5mL OA, 1.5mL oleyl amine (OLA), 1mL tri-n-octyl phosphine (TOP) is then added.It is molten to be made second Liquid.
3) the second solution is heated to 120 DEG C under vacuum conditions, 30min is kept with this condition, is passed through nitrogen later Second solution is heated to 190 DEG C, the first solution of 1.2mL is taken to inject rapidly at this temperature and is cooled to 30 DEG C -40 DEG C at once. Third solution is made.
4) third solution is divided into two parts and is put into 10mL centrifuge tube, is centrifuged using centrifuge agent with the revolving speed of 6500rpm 5min is removed supernatant, sediment in centrifuge tube is taken to be dissolved using 10mL toluene, and Mn is made2+The CsPbCl of doping3Perovskite amount Sub- point.
5) by obtained 10mL Mn2+The CsPbCl of doping3Perovskite quantum dot is put into the single port bottle of 25mL, is taken 100uL methyl silicate (TMOS) is injected into this single port bottle, this mixture is under 25 DEG C -30 DEG C of room temperature environment with the speed of 800rpm Rate stirs 8h.The 4th solution is made.
6) the 4th solution stirring after, be divided into two parts and be put into 10mL centrifuge tube, using centrifuge with The revolving speed of 10000rpm is centrifuged 10min.
7) after 6) being centrifuged, the supernatant in centrifuge tube is removed, sediment in pipe is placed in vacuum environment dry And finally obtain Mn2+The CsPbCl of doping3Perovskite quantum dot powder.
It 8) in use, can be by Mn2+The CsPbCl of doping3Perovskite quantum dot powder weighs and dissolves in n-hexane, toluene etc. In organic solvent.
9) 0.02gSiO is taken2The Mn of cladding2+The CsPbCl of doping3Perovskite quantum dot powder is set with 0.15g polystyrene In 50mL centrifuge tube, 10mL toluene is then added, mixing fullys shake using eddy mixer.The 5th solution is made.
10) it takes 0.02g green emitting phosphor and 0.15g polystyrene to be placed in 50mL centrifuge tube, 10mL toluene is then added, Mixing fullys shake using eddy mixer.The 6th solution is made.
11) the 5th solution and the 6th each 1mL of solution are taken respectively using two 1mL needle tubings, the 5th solution of 0.2mL is added dropwise to indigo plant In color fluorescence lamp bead, lamp bead is then placed in 80 DEG C of baking ovens dry 20min.Lamp bead is taken out later, after it is cooled to room temperature The 6th solution of 0.1mL is added dropwise, completion of dropwise addition is placed in 80 DEG C of baking ovens dry 20min.
12) to after drying, take lamp bead cap to cover lamp bead luminous component in 11) step, complete the production.
Embodiment 2 (TEOS hydrolysis):
1) 0.25g cesium carbonate (Cs is weighed first2CO3) be fitted into 50mL there-necked flask, then be added 10mL 1- octadecylene, 1.5mL oleic acid (OA) is passed through nitrogen after so that it is heated 30min under 120 DEG C of vacuum environment and is warming up to 150 DEG C, finally drops Temperature is stored in nitrogen environment to 25 DEG C -30 DEG C.The first solution is made.
2) 0.0556g lead chloride (PbCl is weighed2) and 0.0828g manganese chloride (MnCl2) it is added to the there-necked flask of 25mL together In, 5mL 1- octadecylene, 1.5mL OA, 1.5mL oleyl amine (OLA), 1mL tri-n-octyl phosphine (TOP) is then added.It is molten to be made second Liquid.
3) the second solution is heated to 120 DEG C under vacuum conditions, 30min is kept with this condition, is passed through nitrogen later Second solution is heated to 190 DEG C, the first solution of 1.2mL is taken to inject rapidly at this temperature and is cooled to 30 DEG C -40 DEG C at once. Third solution is made.
4) third solution is divided into two parts and is put into 10mL centrifuge tube, is centrifuged using centrifuge agent with the revolving speed of 6500rpm 5min removes supernatant, and Mn is made2+The CsPbCl of doping3Perovskite quantum dot.
5) by obtained Mn2+The CsPbCl of doping3Perovskite quantum dot is dissolved using 10mL toluene, is put into the list of 25mL In mouth bottle, the 4th solution is made.
6) by the second of the cetyl trimethylammonium bromide of 2mmol and tetraethyl orthosilicate (TEOS) and 10mL of 1mmol Alcohol mixing, uses magnetic stirring apparatus with the revolving speed 15min of 400rpm, the 5th solution is made
7) the 5th solution is added drop-wise in the 4th solution with the rate of 2mL/h, in the process using magnetic stirring apparatus with The rate of 400rpm is stirred, until completion of dropwise addition.
8) it after 7) stirring, takes mixture to be divided into four parts and is put into 10mL centrifuge tube using centrifuge with 10000rpm Revolving speed be centrifuged, after centrifugation, remove the supernatant in centrifuge tube, sediment in pipe be placed in vacuum environment dry And finally obtain SiO2The Mn of cladding2+: CsPbCl3Perovskite quantum dot powder.
It 9) in use, can be by Mn2+The CsPbCl of doping3Perovskite quantum dot powder weighs and dissolves in n-hexane, toluene etc. In organic solvent.
10) 0.02gSiO is taken2The Mn of cladding2+The CsPbCl of doping3Perovskite quantum dot powder is set with 0.15g polystyrene In 50mL centrifuge tube, 10mL toluene is then added, mixing fullys shake using eddy mixer.The 5th solution is made.
11) it takes 0.02g green emitting phosphor and 0.15g polystyrene to be placed in 50mL centrifuge tube, 10mL toluene is then added, Mixing fullys shake using eddy mixer.The 6th solution is made.
12) the 5th solution and the 6th each 1mL of solution are taken respectively using two 1mL needle tubings, the 5th solution of 0.2mL is added dropwise to indigo plant In color fluorescence lamp bead, lamp bead is then placed in 80 DEG C of baking ovens dry 20min.Lamp bead is taken out later, after it is cooled to room temperature The 6th solution of 0.1mL is added dropwise, completion of dropwise addition is placed in 80 DEG C of baking ovens dry 20min.
13) to after drying, take lamp bead cap to cover lamp bead luminous component in 11) step, complete the production.
Embodiment 3 (APTES hydrolysis):
1) 0.25g cesium carbonate (Cs is weighed first2CO3) be fitted into 50mL there-necked flask, then be added 10mL 1- octadecylene, 1.5mL oleic acid (OA) is passed through nitrogen after so that it is heated 30min under 120 DEG C of vacuum environment and is warming up to 150 DEG C, finally drops Temperature is stored in nitrogen environment to 25 DEG C -30 DEG C.The first solution is made.
2) 0.0556g lead chloride (PbCl is weighed2) and 0.0828g manganese chloride (MnCl2) it is added to the there-necked flask of 25mL together In, 5mL1- octadecylene, 1.5mL OA, 1.5mL oleyl amine (OLA), 1mL tri-n-octyl phosphine (TOP) is then added.It is molten to be made second Liquid.
3) the second solution is heated to 120 DEG C under vacuum conditions, 30min is kept with this condition, is passed through nitrogen later Second solution is heated to 190 DEG C, the first solution of 1.2mL is taken to inject rapidly at this temperature and is cooled to 30 DEG C -40 DEG C at once. Third solution is made.
4) third solution is divided into two parts and is put into 10mL centrifuge tube, is centrifuged using centrifuge agent with the revolving speed of 6500rpm 5min is removed supernatant, sediment in centrifuge tube is taken to be dissolved using 10mL toluene, and Mn is made2+The CsPbCl of doping3Perovskite amount Sub- point.
5) by obtained 10mL Mn2+The CsPbCl of doping3Perovskite quantum dot is put into the single port bottle of 25mL, is taken 90uL (3- aminopropyl) triethoxysilane (APTES), 1mL dimethyl sulfoxide (DMF) are injected into this single port bottle, this mixture 3h is stirred with the rate of 800rpm under 25 DEG C -30 DEG C of room temperature environment.The 4th solution is made.
6) the 4th solution stirring after, be divided into two parts and be put into 10mL centrifuge tube, using centrifuge with The revolving speed of 10000rpm is centrifuged 10min.
7) after 6) being centrifuged, the supernatant in centrifuge tube is removed, sediment in pipe is placed in vacuum environment dry And finally obtain Mn2+The CsPbCl of doping3Perovskite quantum dot powder.
It 8) in use, can be by Mn2+The CsPbCl of doping3Perovskite quantum dot powder weighs and dissolves in n-hexane, toluene etc. In organic solvent.
9) 0.02gSiO is taken2The Mn of cladding2+The CsPbCl of doping3Perovskite quantum dot powder is set with 0.15g polystyrene In 50mL centrifuge tube, 10mL toluene is then added, mixing fullys shake using eddy mixer.The 5th solution is made.
10) it takes 0.02g green emitting phosphor and 0.15g polystyrene to be placed in 50mL centrifuge tube, 10mL toluene is then added, Mixing fullys shake using eddy mixer.The 6th solution is made.
11) the 5th solution and the 6th each 1mL of solution are taken respectively using two 1mL needle tubings, the 5th solution of 0.2mL is added dropwise to indigo plant In color fluorescence lamp bead, lamp bead is then placed in 80 DEG C of baking ovens dry 20min.Lamp bead is taken out later, after it is cooled to room temperature The 6th solution of 0.1mL is added dropwise, completion of dropwise addition is placed in 80 DEG C of baking ovens dry 20min.
12) to after drying, take lamp bead cap to cover lamp bead luminous component in 11) step, complete the production.
Only highly preferred embodiment of the present invention is described above, but is not to be construed as limiting the scope of the invention.This Invention is not only limited to above embodiments, and specific structure is allowed to vary.All protection models in independent claims of the present invention Interior made various change is enclosed to all fall in the scope of protection of the present invention.

Claims (1)

1. a kind of white luminous two pole of manganese ion doping chlorine lead caesium high stability perovskite quantum dot based on coated with silica The preparation method of pipe, it is characterised in that: it the described method comprises the following steps,
(1), 0.25g cesium carbonate is weighed first to be fitted into 50mL there-necked flask, 10mL1- octadecylene, 1.5mL oleic acid is then added, makes It is passed through nitrogen after heating 30min under 120 DEG C of vacuum environment and is warming up to 150 DEG C, is finally cooled to 25 DEG C of -30 DEG C of preservations In nitrogen environment, the first solution is made；
(2), it weighs 0.0556g lead chloride and 0.0828g manganese chloride is added to together in the there-necked flask of 25mL, be then added 5mL1- octadecylene, 1.5mLOA, 1.5mL oleyl amine, 1mL tri-n-octyl phosphine, are made the second solution；
(3), the second solution is heated to 120 DEG C under vacuum conditions, keeps 30min with this condition, being passed through nitrogen later will Second solution is heated to 190 DEG C, takes the first solution of 1.2mL to inject rapidly at this temperature and is cooled to 30 DEG C -40 DEG C at once, system At third solution；
(4), third solution is divided into two parts and is put into 10mL centrifuge tube, 5min is centrifuged with the revolving speed of 6500rpm using centrifuge agent, Supernatant is removed, sediment in centrifuge tube is taken to dissolve using 10mL toluene, Mn is made2+The CsPbCl of doping3Perovskite quantum dot；
(5), by obtained 10mLMn2+The CsPbCl of doping3Perovskite quantum dot is put into the single port bottle of 25mL, takes 100uL Methyl silicate is injected into this single port bottle, this mixture stirs 8h under 25 DEG C -30 DEG C of room temperature environment with 800rpm rate, is made 4th solution；
(6), after the stirring of the 4th solution, two parts is divided into and is put into 10mL centrifuge tube, using centrifuge with 10000rpm Revolving speed be centrifuged 10min；
(7), after step (6) are centrifuged, the supernatant in centrifuge tube is removed, sediment in pipe is placed in vacuum environment and is done It is dry and finally obtain SiO2The Mn of cladding2+The CsPbCl of doping3Perovskite quantum dot powder；
(8), 0.02gSiO is taken2The Mn of cladding2+The CsPbCl of doping3Perovskite quantum dot powder is placed in 0.15g polystyrene In 50mL centrifuge tube, 10mL toluene is then added, mixing fullys shake using eddy mixer, the 5th solution is made；
(9), it takes 0.02g green emitting phosphor and 0.15g polystyrene to be placed in 50mL centrifuge tube, 10mL toluene is then added, makes Mixing fullys shake with eddy mixer, the 6th solution is made；
(10), the 5th solution and the 6th each 1mL of solution are taken respectively using two 1mL needle tubings, the 5th solution of 0.2mL is added dropwise to blue In fluorescence lamp bead, lamp bead is then placed in 80 DEG C of baking ovens dry 20min；Lamp bead is taken out later, is dripped after it is cooled to room temperature Add the 6th solution of 0.1mL, completion of dropwise addition is placed in 80 DEG C of baking ovens dry 20min；
(11), to after drying, lamp bead cap be taken to cover lamp bead luminous component in step (10), preparation is completed.
CN201910862517.4A 2019-09-12 2019-09-12 A kind of preparation of the manganese ion doping chlorine lead caesium high stability perovskite quantum dot white light-emitting diode based on coated with silica Pending CN110511753A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111100628A (en) * 2019-12-23 2020-05-05 吉林师范大学 Highlight stable perovskite magneto-optical microsphere for CTC capture
CN111739995A (en) * 2020-07-03 2020-10-02 青岛科技大学 White light LED based on dual-waveband white light perovskite quantum dots and preparation method
CN113025311A (en) * 2021-03-17 2021-06-25 广东工业大学 Manganese-doped cesium-lead-chlorine luminophor based on silicon dioxide coating and preparation method and application thereof
CN114907723A (en) * 2022-04-18 2022-08-16 太原科技大学 Fluorescent encryption anti-counterfeiting ink based on halide perovskite quantum dots and preparation method thereof

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