23% Efficient 'n-i-p' Hybrid Solar Cells

• The new monolithic tandem solar cell developed by Chonnam National University achieved 23% efficiency and a 2.1V open-circuit voltage. Fusing all-inorganic halide perovskites and other materials, it promises to revolutionize artificial photosynthesis and agri-voltaic applications.

Researchers at Chonnam National University in South Korea have developed a new monolithic tandem solar cell incorporating all-inorganic halide perovskites and other materials. This hybrid device combines a wide bandgap material and a narrow bandgap material with a suitable interconnecting layer. When integrated, their device achieved an efficiency of 23.07% and an open-circuit voltage of 2.1 V, and retained over 90% of its efficiency for over 600 hours at maximum power. The process used a hot-air assisted spin coating technique to avoid complicated sputtering or atomic layer deposition processes. The researchers are hopeful their device could be used in commercial applications, such as artificial photosynthesis and agri-voltaic applications. In future studies, they plan to implement this concept into triple or multi-junction tandem solar cells in order to further evaluate their potential.

What Efficiency and Open-Circuit Voltage Achieved with New Monolithic Tandem Solar Cell?

• The new monolithic tandem solar cell achieved an efficiency of 23.07% and an open-circuit voltage of 2.1 V.
• The device retained 90% of its efficiency for over 600 hours at maximum power.
• The process used a hot-air assisted spin coating technique to avoid complicated sputtering or atomic layer deposition processes.
• The new monolithic tandem solar cell could be used in commercial applications, such as artificial photosynthesis and agri-voltaic applications.
• The researchers plan to implement the concept into triple or multi-junction tandem solar cells to further evaluate their potential.