On October 1, 2026, Kunshan GCL Optoelectronic Material Co., Ltd. completed the pre-launch assembly of single-junction perovskite solar cell modules for an in-orbit verification mission. These modules are scheduled to launch aboard B300 series small cargo spacecraft developed by Beijing Ziwei Yutong Technology, entering a near-Earth circular orbit at approximately 360 kilometers altitude and 41.5 degrees inclination to conduct performance validation. This marks a significant engineering test for domestic perovskite cells targeting space power applications.
But this is far from an isolated event. Across the globe, a wave of perovskite space missions is unfolding-and for good reason.
Why Space Needs a New Kind of Solar Cell
Since the launching of the Vanguard 1 spacecraft in 1958, solar energy has been used in spacecrafts. Currently, III-V multijunction solar cells formed from gallium arsenide is the leading technology in the space photovoltaic sector as they have conversion efficiency rates of up to 30% and they are highly radiation resistant as well; however, in spite of those advantages, III-V multijunction cells have expensive materials and manufacturing processes. The direct cost of gallium arsenide space battery is about 300 CNY (44 USD) for every watt of energy produced from it while the price of the complete solar array systems is about 500 CNY (73 USD) for every watt of power; thus, it can be calculated that about 100,000 CNY (14,750 USD) is paid for one square meter of solar panels used in the space.
As commercial space activities scale up, especially with the deployment of large low-Earth-orbit satellite constellations, this cost structure is becoming unsustainable. The space industry needs a lighter, cheaper, and equally capable alternative.
Perovskite solar cells offer precisely that. These thin-film devices can be processed onto flexible polymer substrates, enabling exceptional specific power-the amount of electrical power obtainable per unit of mass. While conventional silicon space solar panels deliver less than 1 W/g, and III-V triple-junction cells reach about 3 W/g, perovskite devices have achieved specific power densities of 23–30 W/g-a 10–15× improvement over silicon and a 4–6× improvement over III-V cells. Some ultra-thin perovskite cells have even reached 50 W/g under laboratory conditions.
This matters enormously in space, where every gram of payload translates into launch costs. Perovskite cells can generate more than 10 times the power of conventional rigid solar cells at the same weight, potentially reducing satellite mass and launch costs dramatically.
The Challenges of Operating in Space
Unfortunately, the space environment is ruthless. In Low Earth Orbit, solar cells are subjected to effects of atomic oxygen fatigue, extreme ultraviolet radiation, impact of high-energy particles, and thermal shocks ranging from -100°C to +150°C as the spacecraft moves through the shadow of Earth. These factors work together and cannot be entirely duplicated with the help of Earth-based tests.
The GCL program aims at putting an end to this problem. The modules launched on the 1st of October contain 8 single-junction perovskite cells of 7cm x 7cm in size which were provided in 2 strings. The team applied some advanced material formulations and interface passivation methods by using ultra-thin UTG glass as the cover for the cells together with other materials. The modules are designed so to operate in conditions of atomic oxygen fatigue, hard exposure to ultraviolet radiation, and temperature changes over the range of -100°C to +150°C with the operation period of more than one year.
During the mission, the team will conduct in-orbit current-voltage (I-V) measurements to continuously track efficiency and output changes throughout the mission cycle, comparing these with orbital environmental data and ground simulation results to analyze comprehensive degradation patterns that single-factor testing cannot reveal.
A Global Verification Wave
GCL's mission is part of a broader international push. On the same day as GCL's assembly milestone, Singapore's Nanyang Technological University launched the CRIMSON-1 satellite aboard a SpaceX Falcon 9 rocket, carrying perovskite solar cells developed by NTU researchers and Singfilm Solar for a year-long in-orbit test.
In China, the pace is equally intense. On September 17, 2026, Yanhe Technology's flexible perovskite photovoltaic modules entered orbit aboard the Tianyi-52 satellite, initiating China's first commercial-space component-level full-condition engineering verification of flexible perovskite. Previously, in May 2026, Renshuo Photovoltaic's perovskite cells were delivered to China's space station aboard the Shenzhou-23 crewed spacecraft for external in-orbit testing expected to last one year. In the same month, Peking University's perovskite-based tandem cells began the first dynamic service experiment on the space station, enabling real-time monitoring of photovoltaic performance changes under extreme conditions.
The Road Ahead
As per the reports from industry analysts, the global market for space photovoltaic technology is expected to reach CNY 56.9 billion (USD 8.3 billion) in 2026 and may almost touch CNY 1.1 trillion (USD 162.3 billion) by 2035 with the increased use of low Earth orbit satellite constellations. Perovskite-based tandem cells theoretically have efficiency of about 45%, which is already much higher than the efficiency being achieved through conventional single-junction silicon whose efficiency is about 29.4%.
By collecting information about real conditions, transition of technology from laboratory stage to commercial usage is becoming more evident. Initially, this technology was regarded as merely an academic exercise, however, it is currently regarded as a significant engineering challenge that might change the approach mankind has towards ensuring its presence in space.
