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After 85, "Chaser", Professor Tan Hairen of Nanjing University, and then send science again!

2024-02-24 01:34:37

The efficiency of allocbing solar components in series in the whole perovskite is exceeded 24%!

Solar batteries play a vital role in changing energy demand.The single -knot solar cell made of metal halide -based sculpture materials has shown huge potential, and the efficiency of transforming solar light into electrical energy is about 26%.This makes them attractive in the fields of photoelectronics such as laser, light detector, and luminous diode.Using series solar cells can break the efficiency limit of single -knotting solar cells, thereby reducing thermal loss and expanding the use of solar spectrum.The efficiency of small -area all -ingot ore series batteries can reach more than 28%.However, because it is difficult to control uniform crystals when expanding the scale of perovskite, it is challenging to develop a large area (∼200 cm) all perovskite series modules.

In view of this, Professor Tan Hairens research group of Nanjing University Use the doped aminothalide hydrochloride in the goods biochemical buffer list (AAH) to uniformly crystal crystals, and use it to expand the processing window of PB-SN perovskite film, and selectively EssenceThe authentication power conversion efficiency of the full perovskittarized solar component is 24.5%, and the pore diameter area is 20.25 square centimeters .This method provides a feasible way for commercialization.The related research results are published in the latest issue of "Science" with the topic "Homogeneous Crystallization and Buried Interface Perovskite Tandem Modules".

ID = "2gjg2ggn"> The adjustable adjustment of the opodic ore band gap ensures the feasibility of the full perovskite series solar cells.(~ 1.2 to 1.3EV) Composition of battery battery at the bottom of the perovskite.One of the main obstacles to the development of large -scale full -area full -area series of batteries is low efficiency. This is caused by poor crystals and unevenness of broadband gaps and low -band oscorcons.Generally speaking, the wet perxolia ore layer needs to be evenly applied to the conductive base as a coating.Painting perovskite in large areas requires more time to apply perovskite on a small area.Increased time makes the uneven crystallization of the perovskite phase expanded.Therefore, it is necessary to formulate a strategy of extending a uniform periccium thin film formation window.

Slow nuclear and slow volatilization of the slow formation and solvents of the wet perxolia ore film can be extended by extended solution to extend the crystallization of perovskite crystals. (Figure 1).The author adds AAH to a mixed SN-PB metal halide permral anterior body to cause interaction between ingredients, including lead iodide, iodide, iodide nails, and solvents (second-schrobia (two-ameter (two-ameter (two-ameterKidamide and second metamorphosis) .In particular, the AAH salt and di metamimamamide effectively slowed down the release of the solvents during the process of perovskite coating .Therefore, Before observing the crystallization, the time window for forming a uniformly large area of perovskite film during the coating process is extended from 10 seconds to 100 seconds .

Figure 1. The uniformity of PB-SN perovskite film and solar cells coated with blades

Figure 2. The mechanism of extended processing window

[Pleeptication of buried perovskite interface]

The light -absorbing perovskite film usually has two contact points in the device -its top and bottom surface (buried in the interface).The quality of the interface is equally important as the uniformity of the perovskite film .When the perovskite film is coated on the substrate, as the solvent evaporates, the crystals from top to bottom in the film can easily cause defects in the interface.This can lead to charge reorganization -a process of energy waste.The author observes the distribution of AAH salt from the top of the perovskite layer to the bottom.The bottom AAH+ions passivated the interface defect and reduced the charge capture, thereby minimizing the composite loss at the buried interface.In the end, uniform high-quality perovskite film and passivation of the synergies buried into the interface promoted the improvement of the battery performance of the SN-PB low gap peroxic ore. .

Figure 3. The photoelectric performance of the lead-tin oligozoic film and solar cells coated with blades

【Full perovskite series solar cell component】

Then, the author uses PB-SN NBG (~ 1.25EV) perovskite and AAH, Use a complete scalable processing technology to manufacture single -chip all -piece all -ingot orelin series solar cells.The blade coated full olty ore ore series of solar batteries consist of about 380 nm thick WBG lymi ore and about 1000 NM thick NBG perovskite layer (Figure 4A), showing the highest efficiency of 26.8%(Pore diameter area is 1.05 cm 2) VOC is 2.15 V, JSC is 15.5 ma cm−2, FF is 80.5% (Figure 4B, C).In addition, for the best PCE eight -child battery module with a battery width of 5.625 mm, the author achieved a narrow width of 96.1%high GFF and 220 μm (Figure 4d and E, illustration). PCE under the reverse scanning module is 24.9%, VOC is 17.2 V, JSC is 1.85 mA CM−2, and FF is 78.2% (Figure 4E).Even if the pore area increases to 64 CM 2, the uniformity of AAH perovskite film has maintained a 23.8% high efficiency (Figure 4F).When the PB-SN perovskite (FAC) that does not contain MA (FAC) is used, the operation stability of the device is further increased to T80 = 656 hours (Figure 4G).

Figure 4. The photovoltaic performance of all perovskite connecting solar cells and components

[meaning and influence]

Research on the top battery of the top part of the peroxic ore mining in large areasSexuality and help form a large -scale high -quality perovskite film in the process of coating.This article pointed out that the certification efficiency of large -scale all -in -layer solar components is 24.5%, and the pore diameter area is 20.25 cm2, which is more than the efficiency (22.4%) of the solar component of the same size single.This high -efficiency rate provides a broad design space for oscorion technology .However, the reliability of module is a focus point for future commercialization .They observed that compared with modules based on naphoids and methamine -based low -band oscorcular battery batteries, the encapsulating module with encapsulation has better operating stability, andWet and humid stability and thermal cycle stability.Pethan in perovskite is easy to volatilize under severe stress such as high temperature and light, causing perovskite to break down.This should can guide the improvement of the stability of the oscomority series module.

The research results of this article Support key optimization of large -scale uniform high -quality lymph -lying film increase engineering and coating technology .Further increase the efficiency of a large -scale full -area olty ore connected solar cell component to the expected actual limit of 34%is the next important goal.In addition, the maximum reduction of the annual degradation of oligozoic ingot materials in the actual outdoor environment is a key factor that determines the commercial capacity of all perception components.Indeed, compared with the 25 -year life of mainstream crystal silicon photovoltaic, there is still a lot of room for improvement.

Source: High molecular science frontier

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