Search

WO-2026095428-A1 - PEROVSKITE SOLAR CELL MODULE

WO2026095428A1WO 2026095428 A1WO2026095428 A1WO 2026095428A1WO-2026095428-A1

Abstract

An embodiment of the present invention provides a perovskite solar cell module comprising: a plurality of solar cells arranged in a first direction on a substrate and including a perovskite light absorption layer; and a bus bar disposed on the substrate, extending in a second direction different from the first direction, and electrically connected to the plurality of solar cells, wherein the bus bar is spaced apart from an adjacent solar cell among the solar cells by a predetermined distance in the first direction.

Inventors

  • YUN, DA EUN
  • KIM, JUN YOUNG

Assignees

  • 한화솔루션 주식회사

Dates

Publication Date
20260507
Application Date
20251014
Priority Date
20241028

Claims (14)

  1. A plurality of solar cells arranged in a first direction on a substrate and comprising a perovskite light-absorbing layer; and A bus bar disposed on the substrate, extending in a second direction different from the first direction, and electrically connected to the plurality of solar cells; The above busbar is a perovskite solar cell module spaced apart from adjacent solar cells among the above solar cells by a predetermined distance in the first direction.
  2. In Article 1, The above solar cell further includes an electron transport layer disposed on the light absorption layer, and A perovskite solar cell module in which the electron transport layer comprises a fullerene-based organic material.
  3. In Article 2, A perovskite solar cell module comprising one or more types selected from C 60 , C 70 , PC60BM, and PC70BM, wherein the above fullerene-based organic material.
  4. In Article 1, A perovskite solar cell module having a spacing distance between the busbar and the adjacent solar cell ranging from 6 to 30 times the thickness of the busbar.
  5. In Article 1, The above busbar is a perovskite solar cell module spaced from the adjacent solar cell by a range of 3 mm to 10 mm.
  6. In Article 1, A perovskite solar cell module having a ratio of the thickness of the solar cell to the thickness of the busbar selected in the range of 1/3 to 1.
  7. In Article 6, The thickness of the above solar cell is 150 μm to 250 μm, and A perovskite solar cell module having a busbar thickness of 0.3 mm to 0.5 mm.
  8. In Article 6, A perovskite solar cell module in which the angle formed by the imaginary connecting line between the busbar and the adjacent solar cell is in the range of 0 to 5 degrees.
  9. A plurality of solar cells arranged in a first direction on a substrate; and A bus bar disposed on the substrate, extending in a second direction different from the first direction, and electrically connected to the plurality of solar cells; The above solar cell is, Silicon bottom cell including a silicon layer; A perovskite upper cell comprising a perovskite light absorption layer and an electron transport layer composed of a fullerene-based organic material; and A tandem solar cell comprising a recombination layer connecting the silicon bottom cell and the perovskite top cell; The above busbar is a perovskite solar cell module spaced apart from adjacent solar cells among the above solar cells by a predetermined distance in the first direction.
  10. In Article 9, A perovskite solar cell module having a spacing distance between the busbar and the adjacent solar cell ranging from 6 to 30 times the thickness of the busbar.
  11. In Article 9, The above busbar is a perovskite solar cell module spaced from the adjacent solar cell by a range of 3 mm to 10 mm.
  12. In Article 9, A perovskite solar cell module having a ratio of the thickness of the solar cell to the thickness of the busbar selected in the range of 1/3 to 1.
  13. In Article 12, The thickness of the above solar cell is 150 μm to 300 μm, and A perovskite solar cell module having a busbar thickness of 0.3 mm to 0.5 mm.
  14. In Article 9, A perovskite solar cell module in which the angle formed by the imaginary connecting line between the busbar and the adjacent solar cell is in the range of 0 to 5 degrees.

Description

Perovskite solar cell modules Embodiments of the present invention relate to perovskite solar cell modules. Solar cells are photoelectric conversion devices that convert solar energy into electrical energy using the photovoltaic effect. Various methods for solar cells have been proposed, and among them, solar cells using perovskite material, known to have the same crystal structure as calcium titanium oxide ( CaTiO₃ ), as a light-absorbing layer are gaining attention. Perovskite solar cells are third-generation solar cells combined with thin-film technology. They possess high photovoltaic conversion efficiency comparable to that of silicon solar cells and can absorb light in the short-wavelength range and convert it into electrical energy. Generally, a perovskite solar cell comprises a light-absorbing layer containing a perovskite compound, an electron transport layer provided on one side of the light-absorbing layer, and a hole transport layer provided on the other side of the light-absorbing layer. These perovskite solar cells have the advantage of being made of relatively inexpensive materials, can be formed in a low-temperature process of 200°C or lower, and allow for thin-film fabrication via a solution process, thereby reducing manufacturing costs. In addition, development of tandem solar cells, which form a single solar cell by connecting single-junction solar cells containing absorption layers with different band gaps, has been actively underway recently. A tandem solar cell is a structure in which a single-junction solar cell containing an absorption layer with a relatively large band gap and a single-junction solar cell containing an absorption layer with a relatively small band gap are tunnel-junctioned via a junction layer. Among tandem solar cells, perovskite/silicon tandem solar cells, in which a perovskite solar cell is stacked on a silicon solar cell, are receiving much attention as they can achieve a high photoelectric efficiency of over 30%. Meanwhile, solar cells are used as solar cell modules by electrically connecting multiple solar cells in series or parallel and undergoing a packaging process. In solar cell modules, busbars are used to electrically connect strings in which solar cells are connected to each other by ribbons. The current generated in each string is transmitted to a junction box through the busbars. The spacing between the busbar and the solar cell acts as a crucial factor in determining the efficiency of the solar module. In typical silicon-based solar modules, the narrower the spacing between the busbar and the solar cell, the higher the efficiency of the solar module. However, in the case of perovskite solar cells, the rigidity is relatively weak, so delamination occurs when the internal layers of the solar cell are torn off even by small external stresses during the modularization process. In particular, busbars, which expand and contract significantly with temperature, cause interfacial detachment or delamination within the solar cell due to the height difference with the solar cell, which leads to a decrease in the efficiency of the perovskite solar cell module and has a negative impact on stability and lifespan. Accordingly, there is an urgent need for research on perovskite solar cell modules that can achieve high photoelectric efficiency while preventing the aforementioned interfacial detachment or delamination. FIG. 1 is an exploded perspective view of a perovskite solar cell module according to one embodiment of the present invention. FIG. 2 is a cross-sectional view showing an example of a solar cell included in the perovskite solar cell module of FIG. 1. Figure 3 is a plan view showing an enlarged view of section A of Figure 1. Figure 4 is a cross-sectional view taken along the line B-B' of Figure 3. Figure 5 is a graph showing the test results of a perovskite solar cell module according to one embodiment of the present invention. One embodiment of the present invention provides a perovskite solar cell module comprising a plurality of solar cells arranged in a first direction on a substrate and including a perovskite light-absorbing layer, and a bus bar disposed on the substrate, extending in a second direction different from the first direction and electrically connected to the plurality of solar cells, wherein the bus bar is spaced apart from adjacent solar cells among the solar cells by a predetermined distance in the first direction. In one embodiment of the present invention, the solar cell further comprises an electron transport layer disposed on the light absorption layer, and the electron transport layer may comprise a fullerene-based organic material. In one embodiment of the present invention, the fullerene-based organic material may include one or more selected from C60 , C70 , PC60BM, and PC70BM. In one embodiment of the present invention, the spacing between the busbar and the adjacent solar cell may have a value in the range of 6 to 30 times th