CN107742611B - Perovskite solar cell electroluminescence test method based on rare earth luminescent material - Google Patents
Perovskite solar cell electroluminescence test method based on rare earth luminescent material Download PDFInfo
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- CN107742611B CN107742611B CN201710927543.1A CN201710927543A CN107742611B CN 107742611 B CN107742611 B CN 107742611B CN 201710927543 A CN201710927543 A CN 201710927543A CN 107742611 B CN107742611 B CN 107742611B
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Abstract
The invention discloses a perovskite solar cell electroluminescence test method based on rare earth luminescent materials. By adopting the invention, the perovskite solar cell electroluminescence test can be carried out by utilizing a common camera without adopting a special near-infrared camera and arranging a corresponding darkroom, and the wavelength conversion of the rare earth luminescent material has higher and more stable conversion efficiency, simple structure, convenient operation and reliable result.
Description
Technical Field
The invention relates to a perovskite solar cell electroluminescence test method based on a rare earth luminescent material, and belongs to the technical field of thin film device detection.
Background
Solar photovoltaic power generation is an effective means for solving the current increasingly serious energy and environmental problems, in recent years, novel perovskite solar cells are developed rapidly, the highest photoelectric conversion efficiency of the perovskite solar cells reaches more than 20%, although the efficiency of the perovskite solar cells is improved continuously, in the preparation of the perovskite solar cells, defects such as cell pieces, electron-hole pair recombination, nonradiative recombination, Russian recombination and the like are often caused due to improper spin coating, and the defects are one of key factors influencing the efficiency of the perovskite solar cells. The current ones for this drawbackThe detection is mainly based on the electroluminescence phenomenon of the solar cell, and the defects are detected according to the difference of the brightness of the perovskite solar cell after being electrified and are analyzed. But due to the CH-based3NH3PbI3The electroluminescent wavelength range of the perovskite solar cell is 700nm-850nm, the cell area is small, a professional CCD near-infrared camera is required to shoot, a special darkroom is required to be established for testing, the overall structure is complex, and the operation is inconvenient.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a perovskite solar cell electroluminescence test method based on a rare earth luminescent material, which realizes the detection of perovskite solar cells with high reliability under visible light through wavelength reduction.
In order to solve the technical problem, the invention provides a perovskite solar cell electroluminescence test method based on a rare earth luminescent material, which comprises the following steps:
1) preparing a plurality of perovskite solar cells;
2) selecting a perovskite solar cell piece with the highest photoelectric conversion efficiency from the prepared perovskite solar cell pieces, placing the perovskite solar cell piece on a working table, and connecting a power supply with the selected perovskite solar cell piece through a lead;
3) respectively packaging upper surface glass and lower surface glass on the upper surface and the lower surface of the perovskite solar cell piece;
4) coating a rare earth luminescent material on the upper surface glass of the perovskite solar cell piece;
5) according to the open-circuit voltage Voc of the perovskite solar cell, applying voltage to two ends of the cell by using a power supply, wherein the specific range of the applied voltage is as follows: Voc-Voc + 0.2V;
6) under the action of voltage, the wavelength of near infrared light generated by electroluminescence is shortened to be within the visible light range through the rare earth luminescent material on the upper surface glass of the perovskite solar cell, and the electroluminescence of the perovskite solar cell after wavelength conversion is photographed and detected by using a common camera to finish the electroluminescence test of the perovskite solar cell.
The step 1) of preparing the perovskite solar cell is to sequentially prepare an electron transport layer, a mesoporous layer, a perovskite active layer, a hole transport layer and an electrode on a transparent conductive substrate by adopting a spin coating process.
The perovskite solar cell piece is prepared by sequentially preparing TiO on a transparent conductive substrate by adopting a spin coating process2Electron transport layer, TiO2Mesoporous layer, CH3NH3PbI3Perovskite active layer, Spiro hole transport layer, Ag electrode.
In the step 2), selecting the perovskite solar cell is to test an I-V characteristic curve of the prepared perovskite solar cell under certain illumination under the same condition, calculate the photoelectric conversion efficiency and the fill factor, and select a perovskite solar cell with the highest photoelectric conversion efficiency.
In the step 4), the rare earth luminescent material is near-infrared fluorescent powder.
The forming method of the rare earth luminescent material coating comprises the steps of mixing 3g of near-infrared fluorescent powder and 12g of polycarbonate uniformly according to the ratio of 1:4, coating the mixture on the upper surface glass packaged on the front side of the perovskite solar cell in a spin coating mode to uniformly distribute the mixed colloid, and then curing the mixture on a heating table at 70 ℃ to form the coating.
The thickness of the coating is 0.5mm-1 mm.
The invention has the following beneficial effects:
the invention can detect the electroluminescence of the perovskite solar cell after the conversion of the rare earth luminescent material by photographing, can detect the electroluminescence by using a common camera under visible light, has stable conversion efficiency of the rare earth luminescent material and simple and reliable operation, provides a reliable characterization means for researching the preparation process engineering of the perovskite solar cell, and has important guiding significance for the design and development of the high-efficiency perovskite solar cell.
Drawings
FIG. 1 is a diagram of a perovskite solar cell testing device in the invention;
FIG. 2 is a flow chart of the electroluminescence testing method of the perovskite solar cell based on the rare earth luminescent material.
Detailed Description
The invention is further described with reference to the following figures and detailed description. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The electroluminescent test method of the perovskite solar cell based on the rare earth luminescent material is as shown in fig. 1 and fig. 2, and comprises the following specific steps:
1) preparing an electron transmission layer, a mesoporous layer, a perovskite active layer, a hole transmission layer and electrodes in sequence on a transparent conductive substrate by adopting a spin coating process, preparing a plurality of perovskite solar cells, selecting one of the prepared perovskite solar cells with higher photoelectric conversion efficiency, packaging the cell, placing the cell on a working table top 2, and connecting a power supply 8 with the perovskite cell 5 through a lead 7;
2) respectively packaging upper surface glass 4 and lower surface glass 6 on the upper surface and the lower surface of the perovskite solar cell;
3) the rare earth luminescent material is adopted, the near infrared wavelength of 700nm-1300nm can be converted into visible light, and the near infrared fluorescent powder 3 is coated on the upper surface glass 4 of the perovskite solar cell;
4) according to the open-circuit voltage Voc of the perovskite solar cell, selecting a corresponding power supply to apply voltage to two ends of the cell, wherein the applied voltage is slightly larger than or equal to the open-circuit voltage, and the specific range is about Voc-Voc + 0.2V; 5) The wavelength of near infrared light generated by the perovskite solar cell electroluminescence is shortened to be within the visible light range through the rare earth luminescent material, and the common camera 1 is used for photographing and detecting the converted perovskite cell electroluminescence to complete the test of the perovskite solar cell electroluminescence.
Preferably, the rare earth luminescent material is near-infrared fluorescent powder.
In the step 3), the forming method of the rare earth luminescent material coating comprises the steps of mixing 3g of near-infrared fluorescent powder and 12g of polycarbonate uniformly according to the proportion of 1:4, then coating a proper amount of the mixture on the upper surface glass packaged on the front surface of the perovskite solar cell in a spin coating mode to uniformly distribute the mixed colloid, and then curing the mixture on a heating table at 70 ℃ to form a conversion coating with the thickness of 0.5-1 mm.
After coating is complete, based on CH3NH3PbI3The electroluminescent wavelength of the perovskite solar cell is between 700nm and 850 nm.
Examples
And selecting and preparing a high-performance perovskite solar cell, connecting the perovskite solar cell with a power supply, and performing electroluminescence test on the perovskite solar cell by adopting a common visible light camera. The specific operation is as follows:
1) preparing a perovskite solar cell: preparing TiO on a transparent conductive substrate by adopting a spin coating process in sequence2Electron transport layer, TiO2Mesoporous layer, CH3NH3PbI3Perovskite active layer, Spiro hole transport layer, Ag electrode.
2) Selecting a high-performance perovskite solar cell: under the same condition, preparing a plurality of perovskite solar cells, testing an I-V characteristic curve of the perovskite solar cells under certain illumination, calculating parameters such as photoelectric conversion efficiency, fill factors and the like of the perovskite solar cells, and selecting a perovskite solar cell with relatively high parameters.
3) Packaging the selected perovskite solar cell by adopting a method of clamping the upper surface and the lower surface of glass, dispersing near-infrared fluorescent powder in photosensitive glue, and performing spin coating on the surface of the packaging glass on the front surface of the perovskite solar cell to uniformly distribute fluorescent powder slurry.
4) According to the open-circuit voltage of the perovskite solar cell, a corresponding power supply is selected to apply voltage to two ends of the cell, the applied voltage is slightly larger than or equal to the open-circuit voltage, and the specific range is about Voc-Voc + 0.2V.
5) Near infrared light generated by the perovskite solar cell through electroluminescence is converted into visible light through the rare earth luminescent material, and the perovskite solar cell is subjected to electroluminescence detection by using a common camera.
Claims (5)
1. The perovskite solar cell electroluminescence test method based on the rare earth luminescent material is characterized by comprising the following steps:
1) preparing a plurality of perovskite solar cells;
2) selecting a perovskite solar cell piece with the highest photoelectric conversion efficiency from the prepared perovskite solar cell pieces, placing the perovskite solar cell piece on a working table, and connecting a power supply with the selected perovskite solar cell piece through a lead;
3) respectively packaging upper surface glass and lower surface glass on the upper surface and the lower surface of the perovskite solar cell piece;
4) coating a rare earth luminescent material on the upper surface glass of the perovskite solar cell piece; the rare earth luminescent material is near-infrared fluorescent powder;
the forming method of the rare earth luminescent material coating comprises the steps of mixing 3g of near-infrared fluorescent powder and 12g of polycarbonate uniformly according to a ratio of 1:4, coating the mixture on the upper surface glass packaged on the front side of the perovskite solar cell in a spin coating mode to uniformly distribute mixed colloid, and then curing the mixture on a heating table at 70 ℃ to form the coating;
5) according to the open-circuit voltage Voc of the perovskite solar cell, applying voltage to two ends of the cell by using a power supply, wherein the specific range of the applied voltage is as follows: Voc-Voc + 0.2V;
6) under the action of voltage, the wavelength of near infrared light generated by electroluminescence is shortened to be within the visible light range through the rare earth luminescent material on the upper surface glass of the perovskite solar cell, and the electroluminescence of the perovskite solar cell after wavelength conversion is photographed and detected by using a common camera to finish the electroluminescence test of the perovskite solar cell.
2. The electroluminescent test method of the perovskite solar cell based on the rare earth luminescent material as claimed in claim 1, wherein the step 1) of preparing the perovskite solar cell is to sequentially prepare an electron transport layer, a mesoporous layer, a perovskite active layer, a hole transport layer and an electrode on a transparent conductive substrate by adopting a spin coating process.
3. The perovskite solar cell electroluminescence test method based on the rare earth luminescent material as claimed in claim 2, wherein the perovskite solar cell piece is prepared by sequentially preparing TiO on a transparent conductive substrate by adopting a spin coating process2Electron transport layer, TiO2Mesoporous layer, CH3NH3PbI3Perovskite active layer, Spiro hole transport layer, Ag electrode.
4. The electroluminescent test method for perovskite solar cells based on rare earth luminescent materials as claimed in claim 1, wherein the step 2) of selecting perovskite solar cells is to test the I-V characteristic curve of the prepared perovskite solar cells under set illumination under the same conditions, calculate the photoelectric conversion efficiency and the fill factor, and select a perovskite solar cell with the highest photoelectric conversion efficiency.
5. The method for testing the electroluminescence of the perovskite solar cell based on the rare earth luminescent material as claimed in claim 1, wherein the thickness of the coating is selected from 0.5mm to 1 mm.
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| CN104135230A (en) * | 2014-08-07 | 2014-11-05 | 鹤壁国立光电科技有限公司 | Solar cell module EL testing device and method under visible light |
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