In a groundbreaking experiment, researchers from Tsinghua University have proven that two-dimensional (2D) semiconductor materials can withstand the harsh conditions of space. The team, led by Professor Ruitao Lv from the School of Materials Science and Engineering, sent 2D materials and field-effect transistors (FETs) into orbit aboard China’s reusable recoverable satellite—Shijian-19 . After 14 days in space, the materials returned to Earth, showing remarkable stability despite exposure to radiation, microgravity, and high/low temperatures.
The experiment focused on 2D transition metal dichalcogenides (TMDCs), specifically WSe₂ and Nb-doped WSe₂, which were synthesized using chemical vapor deposition (CVD). These materials were used to fabricate FETs, which were then tested for their optical and electrical performance before and after the space flight. The results were impressive: the materials maintained their structural integrity, and the FETs exhibited stable switching characteristics with on/off current ratios between 106 and 107.
One of the most surprising findings was that the 2D materials stored inside the space capsule showed higher photoluminescence (PL) intensity compared to those stored on Earth, suggesting that the space environment might have a “preservation” effect on these materials. This discovery opens up new possibilities for using 2D semiconductors in advanced space technologies, such as radiation-resistant electronics and high-sensitivity optical sensors.
The success of this experiment was made possible by China’s cutting-edge aerospace technology, particularly the Shijian-19 satellite, which is China’s first reusable recoverable satellite. This mission not only marks a significant milestone in space exploration but also demonstrates the potential of 2D materials to revolutionize satellite technology.
The findings, published in the National Science Review, highlight the adaptability of 2D TMDCs in extreme environments and provide a solid foundation for future research in space electronics.
About Tsinghua University:
Tsinghua University is one of China’s leading research institutions, renowned for its contributions to science, engineering, and technology. The School of Materials Science and Engineering focuses on cutting-edge research in materials design, synthesis, and application, with a strong emphasis on innovation and interdisciplinary collaboration.
