Sr3Sn2O7: Sm < 3 + > device for optical storage and electric reading and preparation method of Sr3Sn2O7: Sm < 3 + > device

Abstract

The invention discloses a Sr3Sn2O7: Sm < 3 + > device for optical storage and electric reading, which comprises a conductive glass substrate, a fluorescent powder light-emitting layer is arranged on the conductive glass substrate, and a conductive layer is arranged on the fluorescent powder light-emitting layer; the raw material of the fluorescent powder light-emitting layer is composed of Sr3Sn2O7: Sm < 3 + > fluorescent powder and an adhesive, and the raw material of the conductive layer is composed of metallic silver and an adhesive. A simple sandwich device structure is utilized to generate a constant-voltage electric field around the fluorescent powder, and energy provided by the electric field enables carriers in a fluorescent powder trap to get rid of constraint and become excited carriers again to be compounded with a light-emitting center. Macroscopically, when the device is powered on, the fluorescent powder emits light again, and the stored information is read. In electrical reading, the information written by the ultraviolet light can be presented only by connecting the two electrodes with wires respectively and turning on a power switch. The reading mode is convenient and rapid, the operation process is simple, an additional reading light path does not need to be built, and the method has the basis of large-area popularization.

Description

Technical Field

[0001] The present invention belongs to the field of optical storage technology, and in particular to a Sr 3 Sn 2 O 7 :Sm 3+ Device and method for making the same. Background Art

[0002] Optical storage has the advantages of large capacity, fast reading and writing, and low energy consumption. It is the main storage medium in the information age. Afterglow optical storage materials have attracted extensive attention from researchers due to their low cost, easy preparation, and wide range of material sources. Traditional optical storage mainly reads information through two methods: optical reading and thermal reading. Optical reading is more common. The Chinese patent application number CN200710039856.X discloses a write-once blue-ray storage inorganic medium and its preparation method. The write-once blue-ray storage inorganic medium is made of Sb-Sb prepared on a substrate by reactive magnetron sputtering of antimony Sb and silicon Si. 2 O 3 -SiO 2 Composite films, including Sb, Sb 2 O 3 and SiO 2 Three components, of which the molar percentage of Sb is 10% to 70%, Sb 2 O 3 The molar percentage of SiO is 10% to 40%. 2 The molar percentage is 20% to 80%. The blue light storage inorganic medium prepared by the reactive magnetron sputtering method in this invention has high optical contrast and stability before and after the laser action, but the preparation cost of this invention is high, and it is easy to damage and difficult to miniaturize. Thermal reading is to show the written information by heating the medium. Although it is more convenient, it will cause irreversible damage to the storage medium and is always difficult to industrialize. Therefore, it is urgent to develop a low-cost and miniaturized optical storage device. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a Sr for optical storage electrical reading 3 Sn 2 O 7 :Sm 3+ The device and its preparation method, the optical storage electrical reading adopted by the device has the advantages of being convenient and fast, low cost, easy to integrate into the circuit, less destructive, and can be electrically erased, and has the potential for miniaturization and commercialization.

[0004] The technical solution of the present invention is as follows:

[0005] One of the purposes of the present invention is to provide a Sr 3 Sn 2 O 7 :Sm 3+ The device comprises a conductive glass substrate, a phosphor luminescent layer is arranged on the conductive glass substrate, and a conductive layer is arranged on the phosphor luminescent layer;

[0006] The raw material of the phosphor light-emitting layer is Sr 3 Sn 2 O 7 :Sm 3+ The conductive layer is composed of fluorescent powder and adhesive, and the raw material of the conductive layer is metallic silver.

[0007] Furthermore, the Sr 3 Sn 2 O 7 :Sm 3+ The phosphor is composed of the following raw materials in molar percentage: SrCO 3 50-350mol%, SnO 2 50-250mol%, Sm 2 O 3 0.1-10 mol%.

[0008] Furthermore, the Sr 3 Sn 2 O 7 :Sm 3+ The preparation process of phosphor is as follows:

[0009] S11: Weigh SrCO according to the set ratio 3 SnO 2 and Sm 2 O 3 , rapid wet grinding to mix the raw materials evenly and obtain a premix;

[0010] S12: pre-sintering the premix obtained in step S11 in a high-temperature box furnace, and grinding the pre-sintered powder evenly to obtain pre-sintered powder;

[0011] S13: The pre-fired powder obtained in step S12 is placed in a high-temperature box furnace for sintering, cooled naturally to room temperature, and ground to obtain the Sr 3 Sn 2 O 7 :Sm 3+ Phosphor.

[0012] Furthermore, in step S12, the pre-burning temperature is 600-900° C. and the time is 0.5-2.5 h.

[0013] Furthermore, in step S13, the sintering temperature is 1200-1400° C. and the sintering time is 3-6 hours.

[0014] Furthermore, in the phosphor light-emitting layer, the adhesive is a resin adhesive.

[0015] Furthermore, the resin adhesive is at least one of light-curing glue, silicone glue, and AB glue.

[0016] Furthermore, in the phosphor light-emitting layer, Sr 3 Sn 2 O 7 :Sm 3+ The mass ratio of the phosphor to the adhesive is (0.5-3):1.

[0017] The second object of the present invention is to provide a Sr for optical storage electrical reading 3 Sn 2 O 7 :Sm 3+ The method for preparing the device comprises the following steps:

[0018] S21: Sr 3 Sn 2 O 7 :Sm 3+ The phosphor and the adhesive are fully mixed to obtain a powder adhesive slurry;

[0019] S22: placing the powder adhesive slurry obtained in step S21 on a conductive glass substrate, and applying it by screen printing, heating and curing, and repeating the application and curing operations 1-5 times to obtain a conductive glass substrate / phosphor luminescent layer;

[0020] S23: Apply the conductive silver paste on the conductive glass substrate / phosphor luminescent layer obtained in step S22 by screen printing, heat and cure, and obtain the conductive glass substrate / phosphor luminescent layer / silver paste optical storage electric reading device, i.e., the Sr 3 Sn 2 O 7 :Sm 3+ Device.

[0021] Furthermore, in steps S22-S23, the temperature of the heating and curing is 60-150° C., and the time is 2-30 min.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. A Sr for optical storage and electrical reading provided by the present invention 3 Sn 2 O 7 :Sm3+ The device can adopt a new reading method, namely electrical reading. The principle of optical storage is to pass ultraviolet light with coding or pattern information through conductive glass to excite the phosphor in the luminescent layer, and the irradiated area emits light to display the stored information, and a part of the carriers are bound by the trap of the phosphor so that the information is stored. The traditional reading method uses infrared light or heating to allow the carriers in the trap to obtain energy to break free from the bondage and emit light again, and the coding or pattern with the attached information appears again, and the stored information can be read. The electrical reading proposed by the present invention uses a simple sandwich device structure to generate a constant voltage electric field around the phosphor. The energy provided by the electric field allows the carriers in the phosphor trap to break free from the bondage and become excited state carriers again and recombine with the luminescent center. Macroscopically, it manifests that when the device is powered on, the phosphor emits light again, and the stored information is read. Electrical reading only requires connecting the two electrodes to wires and turning on the power switch to present the information written by ultraviolet light. This reading method is convenient and fast, and the operation process is simple. There is no need to build an additional reading optical path, and it has a foundation for large-scale popularization.

[0024] 2. The present invention can apply an electric field on the top and bottom of the phosphor light-emitting layer through a simple device structure. When the electric field is applied, the information stored in the phosphor light-emitting layer is read, thereby realizing optical storage electrical reading. Optical storage electrical reading has the advantages of being convenient, fast, low cost, easy to integrate into circuits, less destructive, and the information can be erased by increasing the reading voltage. It has the potential for miniaturization and commercialization.

[0025] 3. In the present invention, the Sr 3 Sn 2 O 7 :Sm 3+ Phosphors are not destroyed by water and oxygen in the atmosphere and have excellent stability at room temperature and are suitable for production in small factories. 3+ It is a rare earth luminescence center commonly used in photoelectric detectors. It has four obvious emission peaks. The spectral characteristics are obvious and easy to monitor and identify. The half-width of the four emission peaks is small and has a very high signal-to-noise ratio.

[0026] 4. A Sr for optical storage and electrical reading provided by the present invention 3 Sn 2 O 7 :Sm 3+ The device preparation method uses screen printing to prepare the device, the operation method is simple, the equipment and raw materials are low in cost and easy to purchase, and are not limited by the water and oxygen conditions of the working environment. The prepared device has good stability and can be used for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 In the present invention, Sr 3 Sn2 O 7 :Sm 3+ XRD pattern of powder;

[0028] Figure 2 In the present invention, Sr 3 Sn 2 O 7 :Sm 3+ Steady-state fluorescence spectra of powders;

[0029] Figure 3 In the present invention, Sr 3 Sn 2 O 7 :Sm 3+ Scanning electron microscope image of the powder;

[0030] Figure 4 In the present invention, Sr 3 Sn 2 O 7 :Sm 3+ EDS mapping of powder;

[0031] Figure 5 A Sr prepared by the present invention for optical storage and electrical reading 3 Sn 2 O 7 :Sm 3+ Schematic diagram of the device structure and the optical storage and electrical reading process;

[0032] Figure 6 In the present invention, Sr 3 Sn 2 O 7 :Sm 3+ Physical picture of the device;

[0033] Figure 7 In the present invention, Sr 3 Sn 2 O 7 :Sm 3+ Afterglow emission fluorescence spectrum of the device without power / 750V;

[0034] Figure 8 In the present invention, Sr 3 Sn 2 O 7 :Sm 3+ The change curve of the luminous intensity of the device at a specific emission wavelength in the three stages of optical writing, afterglow decay, and electrical reading. The monitoring wavelength is the optimal emission wavelength of 624nm;

[0035] Fig. 9 In the present invention, Sr 3 Sn2 O 7 :Sm 3+ Schematic diagram of the device during light writing, afterglow disappearance, and voltage application. DETAILED DESCRIPTION

[0036] The following is in conjunction with the preferred embodiment and with reference to the attached Figure 1-9 , the present invention is further described. The endpoints and any values ​​of the ranges disclosed in the present invention are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values; for numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein; the materials, reagents, etc. used in the following examples, unless otherwise specified, can be obtained from commercial channels; the experimental methods in the following examples, unless otherwise specified, are all conventional methods.

[0037] Example 1

[0038] This embodiment provides a Sr for optical storage electrical reading 3 Sn 2 O 7 :Sm 3+ Devices such as Figure 5-6 As shown, it includes a conductive glass substrate, a fluorescent powder luminescent layer is arranged on the conductive glass substrate, and a conductive layer is arranged on the fluorescent powder luminescent layer;

[0039] The raw material of the phosphor light-emitting layer is Sr 3 Sn 2 O 7 :Sm 3+ The conductive layer is composed of fluorescent powder and adhesive, and the raw material of the conductive layer is metallic silver.

[0040] In this embodiment, the Sr 3 Sn 2 O 7 :Sm 3+ The phosphor is composed of the following raw materials in molar percentage: SrCO 3 299mol%, SnO 2 200mol%, Sm 2 O 3 1 mol%, the adhesive is a light-curing adhesive, the Sr 3 Sn 2 O 7 :Sm 3+ The mass ratio of phosphor to photocuring adhesive is 0.5:1.

[0041] In this embodiment, the Sr3 Sn 2 O 7 :Sm 3+ The preparation process of phosphor is as follows:

[0042] S11: Weigh SrCO according to the set ratio 3 SnO 2 and Sm 2 O 3 , rapid wet grinding to mix the raw materials evenly and obtain a premix;

[0043] S12: pre-sintering the premix obtained in step S11 in a high-temperature box furnace at 800° C. for 1 hour, and grinding the pre-sintered powder evenly to obtain pre-sintered powder;

[0044] S13: The pre-fired powder obtained in step S12 is placed in a high-temperature box furnace at 1300° C. for sintering for 5 h, cooled naturally to room temperature, and ground to obtain the Sr 3 Sn 2 O 7 :Sm 3+ Phosphor.

[0045] This embodiment also provides a Sr for optical storage electrical reading 3 Sn 2 O 7 :Sm 3+ The method for preparing the device comprises the following steps:

[0046] S21: Sr 3 Sn 2 O 7 :Sm 3+ The phosphor and the adhesive are fully mixed to obtain a powder adhesive slurry;

[0047] S22: placing the powder adhesive slurry obtained in step S21 on a conductive glass substrate, and applying it by screen printing, heating and curing at 120° C. for 30 min, and repeating the application and curing operations for 3 times to obtain a conductive glass substrate / phosphor luminescent layer;

[0048] S23: Apply the conductive silver paste on the conductive glass substrate / phosphor luminescent layer obtained in step S22 by screen printing, and heat and cure at 120° C. for 30 min to obtain a conductive glass substrate / phosphor luminescent layer / silver paste optical storage electric reading device, i.e., the Sr 3 Sn 2 O 7 :Sm 3+ Devices such as Figure 6 As shown, Figure b is Sr 3 Sn 2 O 7:Sm 3+ Schematic diagram of the front of the device, Figure c is Sr 3 Sn 2 O 7 :Sm 3+ Schematic diagram of the back side of the device.

[0049] Figure 1 The Sr prepared in this example 3 Sn 2 O 7 :Sm 3+ The XRD pattern of the powder, such as Figure 1 As shown, Sr 3 Sn 2 O 7 :Sm 3+ The peak position of the powder is consistent with that of the standard card, which means it is a pure phase phosphor;

[0050] Figure 2 The Sr prepared in this example 3 Sn 2 O 7 :Sm 3+ The steady-state fluorescence spectrum of the powder, such as Figure 2 As shown, Sr 3 Sn 2 O 7 :Sm 3+ The phosphor has four narrow peaks, and the emission peak position is similar to that of Sm 3+ The characteristic peak positions are consistent;

[0051] Figure 3 The Sr prepared in this example 3 Sn 2 O 7 :Sm 3+ Scanning electron microscope images of powders, such as Figure 3 As shown, the particle size of the phosphor is within 10 μm, and the particle size is similar;

[0052] Figure 4 The Sr prepared in this example 3 Sn 2 O 7 :Sm 3+ EDS mapping of powders, such as Figure 4 As shown, Sr 3 Sn 2 O 7 :Sm 3 + In the powder, Sr, Sn, O, and Sm elements are evenly distributed;

[0053] Figure 5 This is a Sr prepared in this embodiment for optical storage and electrical reading.3 Sn 2 O 7 :Sm 3+ Schematic diagram of the device structure and the optical storage and electrical reading process, such as Figure 5 As shown, the write and read method is simple and easy to operate;

[0054] Figure 7 The Sr prepared in this example 3 Sn 2 O 7 :Sm 3+ The device is not powered on / 750V afterglow emission fluorescence spectrum. The emission intensity after power on is significantly higher than that without power on. It can be seen that power on has an enhancing effect on emission, and the emission peak spectrum under power on can be seen to be Sm 3+ Characteristic emission of

[0055] Figure 8 The Sr prepared in this example 3 Sn 2 O 7 :Sm 3+ The luminous intensity variation curve of the device at a specific emission wavelength in the three stages of optical writing, afterglow decay, and electrical reading. The monitoring wavelength is the optimal emission wavelength of 624nm. Figure 8 As shown, information is written from 0 to 120 seconds, and the emission intensity decays exponentially after writing stops. This is caused by the afterglow characteristics of the light-emitting layer. The emission intensity decays to almost 0 at 210 seconds, and then increases sharply after power is turned on, and the stored information is read out.

[0056] Fig. 9 The Sr prepared in this example 3 Sn 2 O 7 :Sm 3+ Schematic diagram of the device during light writing, afterglow disappearance, and voltage application, such as Fig. 9 As shown, Figure a is a schematic diagram of the device emitting light when light is written into a QR code, Figure b is a schematic diagram of the device with the afterglow disappearing after 5 minutes, and Figure c is a schematic diagram of the device emitting light to reveal the QR code and complete electrical reading when voltage is applied.

[0057] Example 2

[0058] This embodiment provides a Sr for optical storage electrical reading 3 Sn 2 O 7 :Sm 3+ The device comprises a conductive glass substrate, a phosphor luminescent layer is arranged on the conductive glass substrate, and a conductive layer is arranged on the phosphor luminescent layer;

[0059] The raw material of the phosphor light-emitting layer is Sr3 Sn 2 O 7 :Sm 3+ The conductive layer is composed of fluorescent powder and adhesive, and the raw material of the conductive layer is metallic silver.

[0060] In this embodiment, the Sr 3 Sn 2 O 7 :Sm 3+ The phosphor is composed of the following raw materials in molar percentage: SrCO 3 199mol%, SnO 2 100 mol%, Sm 2 O 3 1 mol%, the adhesive is a mixture of light-curing adhesive and silicone rubber, the Sr 3 Sn 2 O 7 :Sm 3+ The mass ratio of phosphor to adhesive is 1:1.

[0061] In this embodiment, the Sr 3 Sn 2 O 7 :Sm 3+ The preparation process of phosphor is as follows:

[0062] S11: Weigh SrCO according to the set ratio 3 SnO 2 and Sm 2 O 3 , rapid wet grinding to mix the raw materials evenly and obtain a premix;

[0063] S12: pre-sintering the premix obtained in step S11 in a high-temperature box furnace at 600° C. for 2.5 hours, and grinding the pre-sintered powder evenly to obtain a pre-sintered powder;

[0064] S13: The pre-fired powder obtained in step S12 is placed in a high-temperature box furnace at 1400° C. for 6 hours, cooled naturally to room temperature, and ground to obtain the Sr 3 Sn 2 O 7 :Sm 3+ Phosphor.

[0065] This embodiment also provides a Sr for optical storage electrical reading 3 Sn 2 O 7 :Sm 3+ The method for preparing the device comprises the following steps:

[0066] S21: Sr 3 Sn 2 O7 :Sm 3+ The phosphor and the adhesive are fully mixed to obtain a powder adhesive slurry;

[0067] S22: placing the powder adhesive slurry obtained in step S21 on a conductive glass substrate, and applying it by screen printing, heating and curing at 60° C. for 30 min, repeating the application and curing operation once, and obtaining a conductive glass substrate / phosphor luminescent layer;

[0068] S23: Apply the conductive silver paste on the conductive glass substrate / phosphor luminescent layer obtained in step S22 by screen printing, and heat and cure at 60° C. for 30 min to obtain a conductive glass substrate / phosphor luminescent layer / silver paste optical storage electric reading device, i.e., the Sr 3 Sn 2 O 7 :Sm 3+ Device.

[0069] Example 3

[0070] This embodiment provides a Sr for optical storage electrical reading 3 Sn 2 O 7 :Sm 3+ The device comprises a conductive glass substrate, a phosphor luminescent layer is arranged on the conductive glass substrate, and a conductive layer is arranged on the phosphor luminescent layer;

[0071] The raw material of the phosphor light-emitting layer is Sr 3 Sn 2 O 7 :Sm 3+ The conductive layer is composed of fluorescent powder and adhesive, and the raw material of the conductive layer is metallic silver.

[0072] In this embodiment, the Sr 3 Sn 2 O 7 :Sm 3+ The phosphor is composed of the following raw materials in molar percentage: SrCO 3 99mol%, SnO 2 100 mol%, Sm 2 O 3 10mol%, the adhesive is AB glue, the Sr 3 Sn 2 O 7 :Sm 3+ The mass ratio of phosphor to adhesive is 3:1.

[0073] In this embodiment, the Sr 3 Sn 2 O7 :Sm 3+ The preparation process of phosphor is as follows:

[0074] S11: Weigh SrCO according to the set ratio 3 SnO 2 and Sm 2 O 3 , rapid wet grinding to mix the raw materials evenly and obtain a premix;

[0075] S12: pre-sintering the premix obtained in step S11 in a high-temperature box furnace at 900° C. for 0.5 h, and grinding the pre-sintered powder evenly to obtain a pre-sintered powder;

[0076] S13: The pre-fired powder obtained in step S12 is placed in a high-temperature box furnace at 1400° C. for sintering for 3 h, cooled naturally to room temperature, and ground to obtain the Sr 3 Sn 2 O 7 :Sm 3+ Phosphor.

[0077] This embodiment also provides a Sr for optical storage electrical reading 3 Sn 2 O 7 :Sm 3+ The method for preparing the device comprises the following steps:

[0078] S21: Sr 3 Sn 2 O 7 :Sm 3+ The phosphor and the adhesive are fully mixed to obtain a powder adhesive slurry;

[0079] S22: placing the powder adhesive slurry obtained in step S21 on a conductive glass substrate, and applying it by screen printing, heating and curing at 150° C. for 2 min, and repeating the application and curing operations for 5 times to obtain a conductive glass substrate / phosphor luminescent layer;

[0080] S23: Apply the conductive silver paste on the conductive glass substrate / phosphor luminescent layer obtained in step S22 by screen printing, and heat and cure at 150° C. for 2 min to obtain the conductive glass substrate / phosphor luminescent layer / silver paste optical storage electric reading device, i.e., the Sr 3 Sn 2 O 7 :Sm 3+ Device.

[0081] The present invention utilizes a simple sandwich device structure to generate a constant voltage electric field around the phosphor. The energy provided by the electric field enables the carriers in the phosphor trap to break free from their restraints and become excited carriers again and recombine with the luminescence center. Macroscopically, when the device is powered on, the phosphor emits light again and the stored information is read. Electrical reading only requires connecting the two electrodes to wires and turning on the power switch to display the information written by ultraviolet light. The reading is convenient and fast, and the operation process is simple. There is no need to build an additional reading optical path, and it has a foundation for large-scale popularization.

[0082] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A Sr3Sn2O7:Sm for optical storage and electrical reading 3+ A device comprising a conductive glass substrate, characterized in that A phosphor luminescent layer is disposed on the conductive glass substrate, and a conductive layer is disposed on the phosphor luminescent layer; The raw material of the phosphor light-emitting layer is Sr3Sn2O7:Sm 3+ The conductive layer is composed of fluorescent powder and adhesive, and the raw materials of the conductive layer are composed of metallic silver and adhesive.

2. The Sr3Sn2O7:Sm for optical storage and electrical reading according to claim 1 3+ A device, characterized in that The Sr3Sn2O7:Sm 3+ The phosphor is composed of the following raw materials in mole percent: SrCO3 50-350 mol%, SnO2 50-250 mol%, and Sm2O3 0.1-10 mol%.

3. The Sr3Sn2O7:Sm for optical storage and electrical reading according to claim 2 3+ A device, characterized in that The Sr3Sn2O7:Sm 3+ The preparation process of phosphor is as follows: S11: SrCO3, SnO2 and Sm2O3 are weighed according to a set ratio, and wet-milled quickly to mix the raw materials evenly to obtain a premix; S12: pre-sintering the premix obtained in step S11 in a high-temperature box furnace, and grinding the pre-sintered powder evenly to obtain pre-sintered powder; S13: The pre-fired powder obtained in step S12 is placed in a high-temperature box furnace for sintering, cooled naturally to room temperature, and ground to obtain the Sr3Sn2O7:Sm 3+ Phosphor.

4. The Sr3Sn2O7:Sm for optical storage and electrical reading according to claim 3 3+ A device, characterized in that In step S12, the pre-burning temperature is 600-900° C. and the time is 0.5-2.5 h.

5. The Sr3Sn2O7:Sm for optical storage and electrical reading according to claim 3 3+ A device, characterized in that In step S13, the sintering temperature is 1200-1400° C. and the sintering time is 3-6 hours.

6. The Sr3Sn2O7:Sm for optical storage and electrical reading according to claim 1 3+ A device, characterized in that In the phosphor luminescent layer, the adhesive is a resin adhesive.

7. The Sr3Sn2O7:Sm for optical storage and electrical reading according to claim 6 3+ A device, characterized in that The resin adhesive is at least one of light-curing glue, silicone glue, and AB glue.

8. The Sr3Sn2O7:Sm for optical storage and electrical reading according to claim 1 3+ A device, characterized in that In the phosphor light-emitting layer, Sr3Sn2O7:Sm 3+ The mass ratio of the phosphor to the adhesive is (0.5-3):

1.

9. A Sr3Sn2O7:Sm for optical storage and electrical reading according to any one of claims 1 to 8 3+ The method for preparing a device is characterized in that: The following steps are involved: S21: Sr3Sn2O7:Sm 3+ The phosphor and the adhesive are fully mixed to obtain a powder adhesive slurry; S22: placing the powder adhesive slurry obtained in step S21 on a conductive glass substrate, and applying it by screen printing, heating and curing, and repeating the application and curing operations 1-5 times to obtain a conductive glass substrate / phosphor luminescent layer; S23: Apply the conductive silver paste on the conductive glass substrate / phosphor luminescent layer obtained in step S22 by screen printing, heat and cure, and obtain the conductive glass substrate / phosphor luminescent layer / silver paste optical storage electric reading device, i.e., the Sr3Sn2O7:Sm for optical storage electric reading 3+ Device.

10. The Sr3Sn2O7:Sm for optical storage and electrical reading according to claim 9 3+ The method for preparing a device is characterized in that: In steps S22-S23, the temperature of the heating and curing is 60-150°C and the time is 2-30 minutes.

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