地上並びに軌道上試験を通じてのペロブスカイト太陽電池の宇宙利用の実用性研究

Solar energy is used by majority of spacecraft and satellites as their source of power using triple-junction solar cells which have high power conversion efficiency but expensive making the idea of space infrastructures like space solar power plant and space factories economically unviable. The emergence of organic-inorganic metal halide Perovskite solar cells (PSCs) in 2009 lead to the development of lightweight and cost-efficient solar energy converter that has achieved record efficiency of 25.6% for single junction and 29.5% for tandem cells, as of the writing of this paper. Due to its high conversion efficiency and high power density, it is seen as a viable candidate to be used in satellites and spacecraft. This paper discusses the ground tests and the on-orbit demonstration of Perovskite solar cell with different hole-transport material that would verify the feasibility of Perovskite solar cell in space. Ground test results showed HTM free PSCs made with Carbon as back electrode have better stability than PSC with organic and inorganic HTM, albeit HTM free PSC has lower power conversion efficiency. In-orbit data was only obtained for the inorganic CuSCN HTM which showed slower degradation in space compared with the ground test done on fresh samples. Ageing of the PSCs prior to launch to space is pointed as the cause of slower degradation that allowed for stabilization of materials and reduced reaction with the environment and was demonstrated when ground tests were repeated on aged cells. Comparison between the ground test and in-orbit data showed different degradation rate values, hence improvements to ground test methodology and in-orbit data gathering were discussed to possibly arrive at the same value. Based on the derived lifetime of Perovskite solar cells in ground test and in-orbit, the tested CuSCN samples are not yet ready for space applications. Improvements in materials used, as well as encapsulation method is needed to be developed to allow PSC’s future use in space.九州工業大学博士学位論文 学位記番号：工博甲第538号 学位授与年月日：令和3年12月27日1: Introduction|2: Related Work|3: Research Methodology and Perovskite fabrication|4: Simulated space environment test|5: Perovskite solar cell mission and In-orbit data|6: Comparison between Ground test and In-orbit data|7: Conclusion九州工業大学令和3年