Liquid Crystals Breakthrough Boosts Perovskite Solar Cell Efficiency to Record Levels
The research team achieved a remarkable 22 percent efficiency and a stabilized efficiency of 21 percent for solar modules, featuring enhanced damp heat stability and a size of 31 sq. centimeters.
February 05, 2024. By Abha Rustagi
The research team achieved a remarkable 22 percent efficiency and a stabilized efficiency of 21 percent for solar modules, featuring enhanced damp heat stability and a size of 31 sq. centimeters. This marks a substantial leap from the previous plateau of approximately 19.5 percent for perovskite solar modules exceeding 30 sq. centimeters.
The key to this success lies in the use of liquid crystals that respond to temperature changes, preventing precipitation accumulation and enabling the protection of large-area perovskite films. Unlike previous methods that used liquid crystals as common additives without considering their temperature-responsive properties, this novel approach regulates crystal growth and prevents defects in perovskite films on a larger scale.
Yi Yang, a postdoctoral fellow in the research groups of Professors Ted Sargent and Mercouri Kanatzidis, emphasized the significance of this liquid crystal strategy in addressing scalability issues. He stated, "From a practical perspective, it underscores the limitation of applying well-established methods for small-sized devices to large-scale implementations. It highlights the necessity for developing tailored solutions to minimize performance gaps in the scale-up process."
The breakthrough opens new possibilities for the future, with Yang suggesting that the methodology could be extended to the slot-die coating process, facilitating the production of even larger-area perovskite submodules. Additionally, exploring the functionality and phase structure of liquid crystal molecules presents opportunities to enhance passivation effects and bolster device stability.
This development represents a major step forward in advancing perovskite solar cell technology, offering a more efficient and stable solution for solar energy generation on a larger scale.
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