CN109768164A - A kind of preparation method of flexible optical detector - Google Patents
A kind of preparation method of flexible optical detector Download PDFInfo
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- CN109768164A CN109768164A CN201811550345.9A CN201811550345A CN109768164A CN 109768164 A CN109768164 A CN 109768164A CN 201811550345 A CN201811550345 A CN 201811550345A CN 109768164 A CN109768164 A CN 109768164A
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- graphene oxide
- film
- pcbm
- membrane
- graphene
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Abstract
Perovskite caesium lead iodine nano film material in conjunction with flexible material, is prepared the photodetector with certain flexibility by a kind of preparation method of flexible optical detector of the present invention, the present invention.The present invention is using redox graphene as substrate, surface grows perovskite caesium lead iodine first on it, then electron transport layer materials are prepared in the upper surface of perovskite caesium lead iodine, redeposited metal is as top electrode later, in the preparation of lower surface deposited metal electrode completion device as under of redox graphene.Except redox graphene is as device growth substrate, the effect of hole transmission layer is also acted as.
Description
Technical field
The invention belongs to device preparation fields, and in particular to a kind of visible light light of caesium lead iodine material as photoelectric conversion layer
Electric explorer.
Background technique
With the development of flexible electronic technology, the research and development of flexible optoelectronic detector has been pushed.Flexible optoelectronic detection
Device has potential application in wearable device, field in intelligent robotics.
Perovskite caesium lead iodine (CsPbI3) it is direct band-gap semicondictor material, forbidden bandwidth about 1.7eV, in radiation of visible light
Under can generate photo-generated carrier, reduce the resistance of material, can be used for visible optical detection using this performance.
Summary of the invention
In view of the deficiencies of the prior art, the present invention proposes a kind of preparation methods of optical detector antetype device.
Perovskite caesium lead iodine nano film material in conjunction with flexible material, is prepared the photoelectricity with certain flexibility by the present invention
Detector.The present invention is using redox graphene as substrate, and surface grows perovskite caesium lead iodine first on it, then in calcium
The upper surface of titanium ore caesium lead iodine prepares electron transport layer materials, and redeposited metal is as top electrode later, in redox graphite
The lower surface deposited metal of alkene completes the preparation of device as lower electrode.Redox graphene as device growth substrate it
Outside, the effect of hole transmission layer is also acted as.
A kind of preparation method of flexible optoelectronic sensor prototype device of the invention comprises the concrete steps that:
Step (1) prepares graphene oxide (GO) film by suction method.Graphene oxide water solution (1mg/ml) is taken to pass through
Vacuum filtration method prepares graphene oxide membrane on the nylon membrane filter membrane in 1 micron of aperture.
Step (2) graphene oxide membrane is reduced into redox graphene (RGO) film using thermal reduction method.By oxygen
Graphite alkene film, which is put into the quartz ampoule of nitrogen protection, is heated to 400 DEG C, takes out after keeping the temperature 5 hours at 400 DEG C and obtains oxidation also
Former graphene (RGO) film.
The product utilization thermal evaporation coating method of step (3) step (2) deposits caesium lead iodine film in surface of graphene oxide.
Using redox graphene as growth substrate.Lead iodide and cesium iodide are the raw material of perovskite caesium lead iodine, are respectively put into hot steaming
It is heated simultaneously in two different heating crucibles in hair coating machine, lead iodide and cesium iodide gasify while evaporating by heating melting
To base material redox graphene surface, perovskite caesium lead iodine film then is grown on its surface.Iodine is housed in experiment
The crucible temperature for changing lead is heated to 320 DEG C, and lead iodide caesium temperature is heated to 450 DEG C.Product structure is RGO/CsPbI3。
Product RGO/CsPbI of step (4) in step (3)3Perovskite caesium lead iodine surface passes through one layer of richness of spin-coating method spin coating
Strangle ene derivative PCBM ([6,6]-Phenyl-C61-butyric Acid Methyl Ester) film.PCBM is dissolved in chlorobenzene
Form solution, PCBM mass fraction 2%.Spin coating revolving speed is 3000 revs/min.PCBM film thickness is 20nm.Form RGO/
CsPbI3/ PCBM laminated construction.
Step (5) is in RGO/CsPbI3Two surfaces up and down of/PCBM laminated construction pass through thermal evaporation deposited metal gold
(Au) electrode.Form Au/RGO/CsPbI3/ PCBM/Au laminated construction.
Photodetector prepared by the present invention has the advantages that thickness is thin, photoresponse is fast, high sensitivity, flexible.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Specific embodiment
As shown in Figure 1, a kind of preparation method of optical detector antetype device of the invention comprises the concrete steps that:
Step (1) prepares graphene oxide membrane by suction method.The nylon membrane in 1 micron of the aperture diameter 20mm is taken to be placed on very
In empty Suction filtration device, the graphene aqueous solution that concentration is 1mg/ml is poured on nylon membrane, by vacuum filtration in nylon membrane
The graphene oxide film that surface prepares with a thickness of 60 microns.In air after 10h drying at room temperature, by graphene oxide film
It is removed from nylon membrane.Obtain the graphene oxide film of 60 microns of diameter 20mm thickness.
Step (2) graphene oxide membrane prepares redox graphene (RGO) film through thermal reduction.By graphene oxide
Film, which is put into the quartz ampoule of nitrogen protection, is heated to 400 DEG C, takes out after keeping the temperature 5 hours at 400 DEG C and obtains redox graphene
(RGO) film 2.
Step (3) redox graphene surface thermal evaporation deposits perovskite caesium lead iodine film.Step (2) product oxygen
Change reduced graphene and is used as thermal evaporation plated film growth substrate.Lead iodide and cesium iodide are used as the raw material of perovskite caesium lead iodine, point
It is not put into thermal evaporation coating machine in two different crucibles while heating, lead iodide and cesium iodide are by heating, melting, gasification
It is evaporated to redox graphene surface simultaneously afterwards, then grows into perovskite caesium lead iodine film 3, CsPbI on its surface3Film
3 thickness 50nm.Crucible temperature in experiment equipped with lead iodide is heated to 320 DEG C, and lead iodide caesium temperature is heated to 450 DEG C.Product
Structure is RGO/CsPbI3。
Product RGO/CsPbI of step (4) in step (3)3Perovskite caesium lead iodine surface passes through one layer of richness of spin-coating method spin coating
Strangle ene derivative PCBM ([6,6]-Phenyl-C61-butyric Acid Methyl Ester) film.PCBM is dissolved in chlorobenzene
Form solution, PCBM mass fraction 2%.Spin coating revolving speed is 4000 revs/min.PCBM film 4 is with a thickness of 20nm.Form RGO/
CsPbI3/ PCBM laminated construction.
Step (5) is in PRGO/CsPbI3Upper and lower two surfaces of/PCBM laminated construction are deposited by thermal evaporation respectively
Metallic gold (Au) electrode 1,5.
Claims (2)
1. a kind of preparation method of flexible optical detector, which is characterized in that this method specifically includes the following steps:
Step (1) prepares graphene oxide membrane by suction method
The graphene oxide water solution that concentration is 1mg/ml is taken to make on the nylon membrane filter membrane in 1 micron of aperture by vacuum filtration method
Standby graphene oxide membrane；
Step (2), graphene oxide membrane are reduced into redox graphene film using thermal reduction method
Graphene oxide membrane is put into the quartz ampoule of nitrogen protection and is heated to 400 DEG C, takes out and obtains after keeping the temperature 5 hours at 400 DEG C
Obtain redox graphene film；
The product utilization thermal evaporation coating method of step (2) is deposited caesium lead iodine film in surface of graphene oxide by step (3)
Using redox graphene as growth substrate；Using lead iodide and cesium iodide as the raw material of perovskite caesium lead iodine, put respectively
Enter in thermal evaporation coating machine in two different heating crucibles while heating, lead iodide and cesium iodide are same by heating melting gasification
When be evaporated to base material redox graphene surface, then grow into perovskite caesium lead iodine film on its surface；In experiment
Crucible temperature equipped with lead iodide is heated to 320 DEG C, and lead iodide caesium temperature is heated to 450 DEG C；Product structure is RGO/CsPbI3；
Step (4), in the product RGO/CsPbI of step (3)3Perovskite caesium lead iodine surface passes through one layer of fullerene of spin-coating method spin coating
Derivative PCBM film；PCBM, which is dissolved in chlorobenzene, forms solution, PCBM mass fraction 2%；Spin coating revolving speed is 3000 revs/min；
PCBM film thickness is 20nm；Form RGO/CsPbI3/ PCBM laminated construction；
Step (5), in RGO/CsPbI3Two surfaces up and down of/PCBM laminated construction pass through thermal evaporation deposited metal gold electrode；
Form Au/RGO/CsPbI3/ PCBM/Au laminated construction.
2. a kind of preparation method of flexible optical detector according to claim 1, it is characterised in that: step (1) passes through pumping
Filter method prepares graphene oxide membrane, specific as follows: take the nylon membrane in 1 micron of the aperture diameter 20mm to be placed in Vacuum filtration device,
Poured on nylon membrane concentration be 1mg/ml graphene aqueous solution, by vacuum filtration nylon membrane prepare with a thickness of
60 microns of graphene oxide film；In air after 10h drying at room temperature, graphene oxide film is shelled from nylon membrane
From；Obtain the graphene oxide film of 60 microns of diameter 20mm thickness.
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| CN201811550345.9A CN109768164A (en) | 2018-12-18 | 2018-12-18 | A kind of preparation method of flexible optical detector |
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