Post by Center for Advanced Technologies - Centrum Zaawansowanych Technologii

🤩 Success of researchers from the Laboratory of Special Purpose Materials Synthesis and multidisciplinary, inter-university collaboration! 🔊 A paper titled “Rational Design of Rhodanine-Based Hole-Selective Layers for Optimizing Interfacial Passivation in High-Performance Wide-Bandgap Perovskite Solar Cells” has been published in the prestigious journal Advanced Materials Wiley [IF = 26.8]! 📲 LINK: https://lnkd.in/dMDZA5qC 👩🏻‍🔬👨🏻‍🔬 The authors of the publication are: prof. Ireneusz Kownacki; Dr. hab. Tomasz Pędziński, prof. UAM; Dr. Hab. Maciej Zalas, prof. UAM (Faculty of Chemistry, Uniwersytet im. Adama Mickiewicza w Poznaniu); Dr. Bartosz Orwat, Prof. Przemysław Data, and Prof. Beata Łuszczyńska (Politechnika Łódzka); Dr. Aleksandra Bartkowiak (Institute of Bioorganic Chemistry, Polish Academy of Sciences); Dr. Hab. Przemysław Ledwoń, prof. PŚ (Politechnika Śląska); Dr. Hab. Waldemar Tejchman, prof. UKEN (Uniwersytet Komisji Edukacji Narodowej w Krakowie), as well as Zhong-En Shi, Yu-Hung Wang, Yang-Yen Yu, Yan-Ru Lin, and Prof. Chih-Ping Chen (Ming Chi University of Technology). ⚙️ Wide-bandgap (WBG) perovskite solar cells are a very promising solution for powering indoor devices (e.g., under artificial lighting). However, their performance is limited by energy losses at the interfaces between layers inside the cell. In this publication, the researchers proposed a clever solution to this problem. 💡 The scientists used ultrathin molecular layers (so-called SAMs) that combine: ▪️ an electron donor (TPA) ▪️ special anchoring groups (rhodanine — RH or its derivative RA) 😎 This led to more efficient charge-transporting layers (so-called hole-selective layers). 🔍 What was discovered? The use of a double layer (NiOx + SAM) significantly improves interfacial properties. The RA group is particularly effective at “repairing” surface defects and reducing energy losses. 🧪 The molecular structure influences the growth of perovskite crystals: more “bulky” molecules → smaller crystals and more defects flatter molecules → larger crystals and fewer charge traps. ⚡ Results? 💡 Very high indoor efficiency: up to 41.81% (under LED lighting); outdoor — 18.68%. 💡High stability: the device retained 84% of its performance after 1600 hours.