Between the perovskite/silicon tandem cell R&D laboratory and the GW-level photovoltaic module production workshop, there is a key technical connection point - the LED solar simulator of Beijing Saifan Optoelectronics. It can not only provide researchers with spectral data accurate to the nanometer level, but also complete battery efficiency detection at a speed of three cells per second on the mass production line. It has become the "light link" for the photovoltaic industry to move from laboratory innovation to industrial application, promoting photovoltaic technology to continuously advance towards higher efficiency and lower cost.
I. Building a "light Bridge" between R&D and Mass Production
The Saifan LED solar simulator, with its unique technical design, has achieved a perfect integration of scientific research-level precision and industrial efficiency
Dual-mode operation system: The same device can seamlessly switch between "R&D mode" and "mass production mode". In the R&D mode, the spectral resolution reaches 1nm, supporting 1000-level light intensity fine-tuning, meeting the detailed data requirements for defect state research of perovskite materials. After switching to mass production mode, the testing speed increased by three times, and the accuracy remained within ±0.5%. Through this, a certain enterprise achieved a rapid transition from small-scale laboratory trials to medium-scale trials, and the R&D cycle was shortened by 40%.
Reverse mapping of process parameters: By comparing and analyzing the battery efficiency data on the mass production line with the spectral response curves in the R&D stage, a parameter mapping model from the laboratory formula to the production process is constructed. A certain enterprise has successfully converted the laboratory efficiency of 26.5% of the TOPCon battery it developed into a mass production efficiency of 25.8% by taking advantage of this function, with a conversion rate ranking among the top in the industry.
Cross-technology route compatibility: Whether it is crystalline silicon technology routes such as PERC, TOPCon, and HJT, or thin-film technology routes such as perovskite and cadmium telluride, Saifan simulators can provide customized test solutions. A certain research and development institution, leveraging its multi-technology route compatibility capabilities, completed a comparative study of five battery technologies within one year, providing a scientific basis for the enterprise's technology route selection.
Second, accelerate the industrialization process of new technologies
In the process of photovoltaic new technologies moving from the laboratory to the market, Saifan LED solar simulators play a key driving role:
Research on the mechanism of efficiency attenuation: Through long-term light experiments simulating different light intensifies, temperatures and humidity conditions, the key nodes of battery efficiency attenuation are precisely captured. By taking advantage of this function, a certain HJT enterprise discovered the degradation law of amorphous silicon layers under long-term light exposure. After targeted optimization of the process, the first-year degradation rate of the module was reduced from 2.5% to 1.8%.
Extreme environmental adaptability test: It can simulate the solar spectral characteristics of different regions such as high altitude, deserts, and tropical areas, as well as environmental factors such as diurnal temperature difference and ultraviolet intensity. When a certain enterprise was developing photovoltaic modules for the Middle East market, it utilized the desert intense light simulation function of the Saifan simulator to optimize the heat dissipation design of the modules, increasing the power generation efficiency of the product by 2.3% in a 60℃ environment.
Rapid verification of new materials: For photovoltaic materials such as new slurries, backsheets, and encapsulation films, the Saifan simulator can quickly assess their impact on battery performance. A new type of low-iron ultra-clear glass developed by a certain materials enterprise was found to have a 5% increase in light transmittance in the 300-400nm band through simulator tests. Based on this, after improving the production process, the component efficiency was increased by 0.6 percentage points.
Iii. Promote the upgrading of industrial standards
Saifan Optoelectronics actively participates in the formulation and upgrading of photovoltaic industry standards, leading the industry's development with advanced testing technology
Participating in the formulation of the new generation of battery testing standards: In response to the particularity of perovskite/silicon tandem cells, Saifan, in collaboration with industry associations, has formulated the "Performance Testing Specification for Tandem Solar Cells", which for the first time clearly defined the spectral segmentation testing method, solving the industry problem of inaccurate efficiency testing of tandem cells.
Establish an internationally recognized calibration system: Reach mutual recognition of calibration data with international authoritative institutions such as the Fraunhofer Institute in Germany and the NREL in the United States, enabling the battery efficiency test data of domestic enterprises to be internationally recognized. A certain enterprise thus smoothly entered the high-end photovoltaic market in Europe, with its annual export volume increasing by 30%.
Releasing technical white papers to guide industry development: Every year, the "White Paper on the Development of Photovoltaic Testing Technology" is released, analyzing the testing difficulties and solutions of different technical routes, providing direction guidance for the technological development of the industry. It has become an important reference material for the research and development and production of photovoltaic enterprises.
Iv. Case Evidence: The Transformation from Technological Innovation to Industrial Value
A research and development team from a certain university, using the Saifan simulator, discovered the abnormal photoelectric response of perovskite materials under light of specific wavelengths. Based on this, they developed a new type of interface modification layer, which enabled the laboratory efficiency of perovskite batteries to exceed 31%. After the technology was transferred to the enterprise, with the assistance of Saifan Simulator, it achieved mass production in just 18 months, with a mass production efficiency of 29.2%, setting an industry benchmark.
In the intelligent manufacturing factory of a certain component enterprise, the Saifan simulator was linked with the AI visual inspection system. By analyzing the correlation between the spectral response data of the solar cells and their appearance defects, an intelligent sorting model was established. As a result, the power deviation rate of the components was reduced from ±3% to ±1.5%, significantly enhancing the product's premium capacity and increasing the selling price per watt by 0.05 yuan. The annual increase in profit exceeded 200 million yuan.
The technological progress of the photovoltaic industry cannot be achieved without precision and efficiency in every link. The Saifan LED solar simulator, with its unique bridging role between R&D and mass production, has become the "light engine" driving the photovoltaic industry to continuously break through technical bottlenecks and achieve cost reduction. On the path of pursuing the "lowest cost per kilowatt-hour", Saifan Optoelectronics will continue to take technological innovation as the core and inject a continuous stream of "photopower" into the sustained development of the photovoltaic industry.
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