Transfer from: Prospective Industry Research Institute

major listed companies in perovskite battery industry: Ningde era (300750.SZ); Longji Green Energy (601012.SH); Trina Solar Energy (688599.SH); Jingke Energy (688223.SH); Jingao Technology (002459.SZ); Hangxiao Steel Structure (600477.SH); Baoxin Technology (002514.SZ), etc.

The core data of this article: progress in conversion efficiency of perovskite single junction cells and perovskite/crystalline silicon tandem cells

Perovskite cells have been born for more than ten years, and the conversion efficiency has jumped rapidly

Perovskite cells belong to the third generation of new solar cells, which started late, but developed rapidly. From the perspective of the development of perovskite solar cells, in 2009, Japanese scientists Kojima and Miyasaka applied perovskite to dye-sensitized solar cells and achieved a photoelectric conversion efficiency of 3.8 percent, and perovskite solar cells were officially born. However, the battery only existed for a few minutes. In order to solve the stability problem of perovskite solar cells, Park's team used solid-state spiro-OMeTAD as the hole transport layer in 2012 and prepared the first all-solid-state perovskite solar cells with a cell efficiency of 9.7%.

Subsequently, perovskite solar cells entered a stage of rapid development, and the photoelectric conversion efficiency continued to break through. Thanks to the two-step deposition method, the replacement of titanium dioxide by alumina, and the use of cation exchange, the conversion efficiency of perovskite solar cells has successively exceeded 15%, 20% and 25%. Currently, the single-junction perovskite cell has a conversion efficiency record of 26.1 percent, which was created by the University of Science and Technology of China in July 2023.

in terms of laminated batteries, in November 2023, with NERL certification, the efficiency of crystalline silicon-perovskite laminated batteries independently developed by longji green energy reached 33.9, which is the highest efficiency record of crystalline silicon-perovskite laminated batteries in the world.

Perovskite Laminated Cell Laboratory Highest Conversion Efficiency of 33.9%

according to the latest data released by NERL, as of November 2023, the highest laboratory conversion efficiency of perovskite single junction cells reached 26.1, and the highest laboratory conversion efficiency of perovskite/crystalline silicon laminated cells was as high as 33.9, which was created by the research and development team of longji green energy. Overall, laminated batteries such as perovskite/perovskite, perovskite/silicon, perovskite/film are one of the hotspots of current research and development, and the construction of laminated batteries can greatly improve the efficiency of photoelectric conversion.

There are differences in the direction of supply-side industrialization

At present, the perovskite battery industry is in an important stage from the laboratory to industrialization, and the first year of industrialization may have quietly arrived. At present, domestic perovskite battery manufacturers can be divided into listed enterprises and non-listed enterprises two major competitive factions. Listed enterprises include Ningde Times, Longji Green Energy, Trina Solar Energy, Jingao Technology and other leading enterprises in the battery industry. Most of them have the background of crystalline silicon cells and are working towards perovskite/crystalline silicon laminated cells. Unlisted enterprises include Xiexin Optoelectronics, Fiber Optoelectronics, Dazheng Micro-nano, Polar Photoenergy, Wandu Photoenergy, etc., with single-junction perovskite cells as the main industrialization direction.

different types of enterprises have differences in the technical route of mass production, mainly in the single junction or laminated battery, if laminated, whether to choose perovskite/crystalline silicon laminated, or all perovskite laminated. Most of the listed companies take the laminated development route, Longji Green Energy, Trina Solar Energy, Hangxiao Steel Structure vigorously research and development of perovskite/crystalline silicon laminated solar cells, non-listed enterprises mainly take the single-junction perovskite cell route, in addition, Renshuo Solar Energy is the only full perovskite laminated battery enterprise in the industry.

Demand-side applications have broad prospects

Perovskite cells are competitive in the distributed photovoltaic market and can be widely used in BIPV curtain walls and are also excellent materials for photovoltaic roofs. The downstream application scenarios of perovskite cells are widely benefited from the large light absorption coefficient of perovskite materials, and the effective use of sunlight can be achieved by thin thickness, while the characteristics of perovskite materials determine that the production of perovskite cells can be made using thin, flexible substrates.

In addition, the bandgap adjustability of perovskite solar cells enables them to have the ideal wide bandgap of indoor photovoltaic cells, extending the downstream application range of perovskite cells to low light and indoor photovoltaics, which can be widely used in industrial Internet of Things, smart home and smart travel. At present, there are relevant enterprises to lay out the research in this application field, certified by the National Photovoltaic Industry Metrology and Testing Center, Guangdong Veiluo Energy Technology Co., Ltd. developed perovskite indoor photovoltaic cell photoelectric conversion efficiency reached 44.72 under the irradiation of 1000luxU30 light source.

For more research and analysis of this industry, please refer to the Prospective Industry Research Institute's "China Perovskite Battery (PSCs) Industry Development Prospect Forecast and Investment Strategic Planning Analysis Report".

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