Novel two-dimensional perovskites for high-efficiency solar cells

Purpose and goal

The power conversion efficiency of lead halide perovskite solar cells has increased to over 25%. However, the toxicity of lead may hamper the commercialization. The main objective of this project was to find new lead-free halide perovskite materials and develop environmentally friendly solar cells. A series of lead-free perovskite systems have been explored, and Rb2SbBr6 has been confirmed to be a promising light absorber material for photovoltaic applications. Efficient lead-free perovskite solar cells based on Sb-containing compounds are expected to be fabricated.

Expected results and effects

A series of lead-free perovskite compounds have been synthesized and characterized, and Rb2SbBr6 has been found to be a promising light absorber for photovoltaic applications. As antimony is much less toxic than lead, Rb2SbBr6 can be used as a substitute for lead-based perovskites. Further studies will result in new efficient lead-free perovskite solar cells based on Sb-containing compounds, which may be commercialized, bring economic benefits and promote the international academic reputation for Linköping University in the field of solar cell technology.

Planned approach and implementation

According to the planned approach, a series of lead-free halide perovskite systems were explored, and many perovskite crystals were synthesized and characterized. Rb2SbBr6 was identified as a potential solar absorber, and uniform films of Rb2SbBr6 were further prepared. Fabrication of solar cell based on Rb2SbBr6 was also been tried. Moreover, I have visited the University of Oxford and worked closely with many world-leading scientists, which improved my academic level towards my career goal, as well as strengthening the collaborations between Linköping University and Oxford.