Preparation method of upconversion material of core shell structure and application of conversion material in perovskite solar cell

A technology of solar cells and conversion materials, applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of urgency of perovskite cells and limit the efficiency of perovskite solar cells, and achieve the effect of improving efficiency

Active Publication Date: 2016-03-23
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although perovskite solar cells absorb a lot of visible light, they do not absorb infrared light, which accounts for 43% of sunlight, which greatly

Method used

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  • Preparation method of upconversion material of core shell structure and application of conversion material in perovskite solar cell
  • Preparation method of upconversion material of core shell structure and application of conversion material in perovskite solar cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Step 1, preparation of core-shell structure up-conversion materials

[0043] Step 1.1, 4mmolYCl 3 , 0.9 mmol YbCl 3 , 0.1mmolErCl 3 Mix the solution with 5mmol sodium citrate and stir for 1h, add 50mmolNaF and stir for 30min, adjust the pH of the solution to 8, then conduct a hydrothermal reaction at 200°C for 3h, wash with deionized water and ethanol after cooling, and dry at 80°C for 12h to generate the up-conversion material NaYF 4 :Yb 3+ ,Er 3+ powder, figure 1 For the preparation of NaYF 4 :Yb 3+ ,Er 3+ The X-ray diffraction pattern, it can be seen that NaYF 4 :Yb 3+ ,Er 3+ for pure phase, figure 2 For the preparation of NaYF 4 :Yb 3+ ,Er 3+ It can be seen from the scanning electron microscope that it is hexagonal columnar.

[0044] Step 1.2, add 0.1gNaYF 4 : Yb 3+ , Er 3+ Disperse into 40mL of isopropanol, sonicate for 30min, add 5mL of deionized water and 0.5mL of ammonia water to the above solution, stir for 10min to obtain mixed solution 1; a...

Embodiment 2

[0062] According to Example 1, only the amount of the up-conversion material taken is changed to 0 mmol. Test its electrochemical performance according to the method of embodiment 1, the short-circuit current density of gained battery is 11.74mA cm -2 , the open circuit voltage is 0.63V, the fill factor is 0.57, and the photoelectric conversion efficiency is 4.22%.

Embodiment 3

[0064] According to Example 1, only the process of preparing the prepared up-conversion material is changed, the process is as follows: 4mmolYCl 3 , 0.9 mmol YbCl 3 , 0.1mmolErCl 3 Mix the solution with 10mmol sodium citrate and stir for 1h, add 50mmol NaF and stir for 30min, adjust the pH of the solution to 11, heat the mixed solution at 200°C for 3h, wash with deionized water and ethanol after cooling, and dry at 80°C for 12h to generate the up-conversion material NaYF 4 :Yb 3+ ,Er 3+ powder. Test its electrochemical performance according to the method of embodiment 1, the short-circuit current density of gained battery is 11.73mA cm -2 , the open circuit voltage is 0.76V, the fill factor is 0.68, and the photoelectric conversion efficiency is 6.06%.

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Abstract

The invention relates to a preparation method of an upconversion material of a core shell structure. The method comprises that NaYF4:Yb3+, Er3+ is dispersed into isopropanol, deionized water and ammonia water are added, and stirring is carried out to obtain a first mixed solution; ethyl orthosilicate is added into isopropanol, the isopropanol added with the ethyl orthosilicate is added into the first mixed solution slowly drop by drop, stirring, washing and centrifugal collection are carried out to obtain NaYF4:Yb3+, Er3+@SiO2; and the obtained NaYF4:Yb3+, Er3+@SiO2 deposition is re-dispersed into an isopropanol and DETA mixed solution, mixing is carried out to obtain a second mixed solution, titanium isopropoxide is added into isopropanol, and the isopropanol added with the titanium isopropoxide is added into the second mixed solution slowly drop by drop, stirring is carried out, the obtained solution is added into a hydro-thermal reactor for hydro-thermal processing, washing is carried out via deionized water and ethanol after cooling, the drying is carried out to obtain the upconversion material NaYF4:Yb3+, Er3+@SiO2@TiO2 of the core shell structure. The upconversion material of the core shell structure can serve as material of an upconversion layer of the perovskite solar cell, the perovskite solar cell can absorb infrared light more effectively via the upconversion material, and the efficiency of the cell is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to the preparation of a core-shell structure up-conversion material and its application in perovskite solar cells. Background technique [0002] The development and use of new energy is an important solution to the energy crisis and the greenhouse effect. Solar energy is a kind of renewable energy, which is clean, cheap and available everywhere. According to reports, the energy of sunlight shining on the earth for one hour is enough for human beings to use for one year. Therefore, the utilization of solar energy will likely meet most of the future energy consumption need. A solar cell is a device that converts solar energy into electrical energy through the photoelectric effect or photochemical effect. Traditional silicon-based solar cells have high production costs, high energy consumption, and high environmental pollution. Therefore, many new solar cells such as p...

Claims

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Application Information

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IPC IPC(8): H01L51/46H01L51/42H01L51/48
CPCH10K30/00H10K2102/00Y02E10/549
Inventor 王娟郑思琪张海鹏杨玉兵许云华
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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