Korean Varsity Finds Way To Increase Efficiency Of Perovskite Solar Cells

Korean Varsity Finds Way To Increase Perovskite Cell Efficiency

Tin halide perovskites (Sn-HPs) are promising materials for next-generation solar cell technology. However, they still face issues related to stability and conversion efficiency, requiring addressal. Recently, researchers from Korea revealed that using a special additive namely “4-phenylthiosemicarbazide “can significantly enhance the performance and durability of Sn-HP-based solar cells by controlling crystal formation, passivating defects, and protecting the material from oxidation and moisture. These findings could pave the way for more accessible solar energy.

In particular, tin halide perovskites (Sn-HPs) serve as powerful alternatives to the exceptionally high-performing lead (Pb)-based perovskites. Given that Sn is significantly less toxic to the environment than Pb, research into Sn-HPs is a worthwhile endeavor. Unfortunately, perovskite solar cells (PSCs) made from Sn-HPs still face several challenges that need to be addressed. Specifically, the rapid and disordered crystallization during production leads to the formation of defects in the crystal structure of the perovskite layer, which hampers conversion efficiency. Additionally, Sn-HPs suffer from low stability and high sensitivity to moisture and ambient conditions, limiting the overall lifetime of PSCs made from them.

However, a research team from Korea seems to have found an efficient solution to these issues. Their study was recently published in Advanced Energy Materials and was led by Associate Professor Dong-Won Kang from Chung-Ang University. In this study, the team revealed that introducing 4-Phenylthiosemicarbazide (4PTSC) as an additive during the production of Sn-HPs can boost the performance of PSCs. Their findings were made available published recently.

The researchers showcased the multiple functionalities of 4PTSC as an additive. “We purposely chose a multifunctional molecule that acts as a coordination complex and a reducing agent, passivates defect formation, and improves stability,” explains Kang. But what does this mean?

Given that Sn-HPs are relatively inexpensive to manufacture and demonstrate good performance and great durability, the findings of this study could pave the way to more accessible and long-lasting solar panels. In turn, this can help in making energy cheaper for the general population while staying in line with current sustainability goals.

“Addressing the key challenges of Sn-HPs and significantly improving their performance aligns with our goal of contributing to developing efficient and sustainable renewable energy solutions, thereby advancing green technologies and promoting a sustainable future,” concludes Kang.