"It's cloudy again. The test data of photovoltaic cells is going to be inaccurate once more." "The simulation of space light is always a bit off. The safety assessment of spacecraft is stuck." "The light in the winter greenhouse is insufficient. The sweetness of strawberries won't increase and they won't fetch a good price."... The uncontrollability of natural light was once a major obstacle on the path of innovation in fields such as photovoltaics, aerospace, and agriculture. For two decades, Saifan Optoelectronics has been deeply engaged in the optoelectronic field. With a solar simulator that integrates precision, stability, customization and energy conservation, it has brought "obedient light" to various industries, allowing innovation to bid farewell to being "dependent on the weather".
Photovoltaic R&D: 0.3% light intensity stability, accelerating efficiency breakthrough
When a certain photovoltaic enterprise was developing perovskite/silicon tandem cells, it once got into trouble due to fluctuations in natural light. The conversion efficiency measured in the morning was 25.1%, but it dropped to 23.8% in the afternoon on a cloudy day. The data deviation exceeded 5%, and the core issue remained unidentified for half a year. Wang, the director of R&D, said helplessly. After the introduction of the Saifan solar simulator, the situation was completely reversed.
This device is like A "precision calibrator of light", with a spectral coverage of the entire band from 400nm to 1100nm. It is equipped with the 5th generation intelligent spectral fitting algorithm, achieving a spectral matching degree of A + (0.875-1.125). Even for the near-infrared region of 780-1100nm, which is often overlooked by traditional devices, The accuracy of energy distribution restoration also exceeds 98%. More importantly, its stability is crucial. The light intensity fluctuation is as low as ±0.3% per hour. After a continuous 10-hour test, the change in light intensity does not exceed "the brightness of a night light". The spatial uniformity reaches ±2%, and every inch of the battery cell can receive light evenly. The data deviation is strictly locked within 1%.
With the help of the equipment, Wang's team discovered in just 12 days that the battery's absorption efficiency in the near-infrared band was 13% lower. After optimizing the materials, the battery conversion efficiency jumped to 27.3%, and the results were published in ACS Energy Letters. In the mass production stage, an automated testing line composed of 8 Saifan simulators is seamlessly integrated with the MES system of the production line. The testing speed reaches 60 pieces per minute, and the A-grade product rate has increased from 88% to 94%, reducing defective product losses by over 16 million yuan annually. Meanwhile, the equipment adopts LED light sources, with an overall power consumption of only 650W, which is 70% more energy-efficient than traditional xenon lamp equipment. A 1GW photovoltaic production line can save 200,000 yuan in electricity costs annually. "This device from Saifan has enabled us to break through technical bottlenecks quickly and economically, directly accelerating the R&D pace by 60%!" " Engineer Wang sighed.
Aerospace testing: Resistant to -40℃ to 60℃, strengthening the safety defense line in space
"In-orbit life assessment of spacecraft battery wings: A 1% light intensity deviation may lead to a three-year error. Traditional simulators have a light intensity drift of over 4% at a low temperature of -40 ℃, and the test data is not suitable for use." " The concerns of Sister Li, a test engineer from a certain team of China Aerospace, were all resolved in front of the Saifan simulator.
To adapt to the extreme environment of space, the Saifan simulator adopts a military-grade 6061-T6 aluminum alloy body, and is equipped with an airtight encapsulation of the optical chamber and transmission chamber, just like wearing a "space protective suit". Within the temperature range of -40 ℃ to 60℃, the temperature fluctuation is ≤±0.3℃, and the spectral output deviation is always ≤±0.5%. When simulating the AM0 spectrum in space (solar radiation without atmospheric filtering), through calibration of 200,000 sets of space spectral data, atmospheric interference is precisely removed, with an irradiance error of ≤±1%, achieving a "1:1 replication" of space lighting. The equipment is also equipped with a 0.1ms high-sensitivity sensor, which can correct the light intensity fluctuations in real time. After continuous 720-hour low-temperature irradiation test, the light intensity deviation is always ≤±1.2%, fully recording the aging law of the material.
Relying on these precise data, the team has developed a new type of anti-radiation coating, which has extended the in-orbit lifespan of the battery wing by three times. During the Mars exploration mission, the Saifan team demonstrated "ultra-fast customization capabilities", completing the development of the "AM0 + Infrared Enhancement" module in just 7 days. This increased the irradiance in the 800-1100nm band by 30%, perfectly regenerating the surface light of Mars. It also helped improve the power generation efficiency of the Mars rover's solar panels by 22%, resolving the "energy anxiety" in deep space exploration. "With this' Space Light replication machine 'from Saifan, we have more confidence in the power safety of our space missions!" " Sister Li said.
Scientific research agriculture: 1% precision control, allowing "light formula" to bear fruits of prosperity
To study photocatalytic hydrogen production, it is necessary to adjust the proportion of the ultraviolet band from 5% to 15%. Traditional equipment only has a fixed spectrum, and the experiment has been stuck for half a year with no progress. The predicament of Teacher Zhou from Qingdao University of Science and Technology was broken by the "customization capability" of Saifan Simulator.
The Saifan simulator can be called a "palette of light". It supports 1% precision adjustment in the ultraviolet (350-400nm), visible (400-760nm), and near-infrared (760-1100nm) bands. The light intensity can be freely switched from 0.1sun (overcast light) to 2sun (midday strong light). It can also simulate eight lighting scenarios such as the alternation of day and night, seasonal changes, and pulsed light. Professor Zhou's team increased the efficiency of photocatalytic hydrogen production by 40% through precise control, and the results were published in "Applied Catalysis B: Environmental".
In the agricultural sector, it is even more of a "green production-increasing wonder". Lao Yang, a strawberry grower in Shandong Province, once suffered from insufficient winter sunlight. The sweetness of his strawberries was only 8 degrees, with an average yield of less than 2,000 kilograms per mu and a selling price of 6 yuan per jin. After the introduction of Saifan equipment, the technical team customized a solution of "65% red light + 10% blue light +2 hours of 380nm ultraviolet light", supplementing 6 hours of "customized light" every day. After one growing season, the sweetness of strawberries soared to 11 degrees, the anthocyanin content increased by 18%, the yield per mu rose to 2,150 kilograms, the price per jin rose to 12 yuan, and the annual income of 20 mu of land increased by more than 200,000 yuan. "Before, we relied on the weather for a living. Now, we make money from 'Saifan Light', and the equipment consumes less electricity. The monthly electricity bill is half that of traditional supplementary lights!" " Lao Yang said with a smile that this plan has been promoted in over ten strawberry bases across the country, driving nearly a hundred households to increase their income by an average of 150,000 yuan per year.
Full-cycle service: On-site service within 48 hours, ensuring innovation is worry-free
Saifan Optoelectronics is well aware that good equipment cannot do without good service. The seven major regional spare parts centers across the country have over 95% of the commonly used spare parts in stock, providing a 7× 24-hour response. Equipment malfunctions can be repaired within 48 hours. A photovoltaic enterprise's production line simulator suddenly broke down. Engineers from Saifan arrived at the scene within 2 hours and completed the repair within 3 hours, without affecting the production of the day. For research institutions, we offer "one-on-one" training. After a certain university's laboratory made the purchase, engineers provided on-site guidance for three consecutive days, helping the team master core operations such as spectral regulation and data calibration within a week. When purchasing the equipment, you can also enjoy the first spectral calibration service for free. The lifespan of the LED light source is up to 10,000 hours. Assuming it is used for 8 hours a day, it does not need to be replaced in 3 years, saving 50,000 yuan in replacement costs compared to traditional equipment annually.
Today, Saifan solar simulators have served over 200 customers worldwide. The repurchase rate of core customers is 82%, and 85% of new customers come from referrals by existing customers. From the efficient and energy-saving operation of photovoltaic production lines to the safe execution of space missions, and then to the green harvests in the fields, Saifan has always been helping various industries break the shackles of light with "controllable light". If your innovation is also hindered by the problem of light exposure, this "light that understands your needs" might just be the key for you to break through the bottleneck.
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