Room-Temperature Synthesis of Lead-Free Copper-Antimony-Based Double Perovskite Nanocrystals for Photovoltaic Application
Shizhe Wang a, Dan Han a, Rik Hooijer a, Andreas Weis a, Florian Wolf a, Hubert Ebert a, Thomas Bein a
a Department of Chemistry, University of Munich, Butenandtstrasse 5-13, 81377 Munich, Germany
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
València, Spain, 2022 May 19th - 25th
Organizers: Pablo Docampo, Eva Unger and Elizabeth Gibson
Poster, Shizhe Wang, 235
Publication date: 20th April 2022

In the field of perovskite solar cells, explorations of new lead-free all-inorganic perovskite materials are of great importance to solve the instability and toxicity issues of lead-based hybrid perovskites. Recently, copper-antimony-based double perovskite nanoparticles have been reported with ideal bandgap and good air stability, which possess great potential as absorbers for photovoltaic applications.[1-2] Here, for the first time, we demonstrate a facile and fast synthesis method for copper-antimony-based double perovskite nanocrystals (PNCs) by using a modified room-temperature ligand-assisted reprecipitation (RT-LARP) method[3] at ambient conditions. Comparing to commonly used solvents like dimethylformamide, less-toxic methanol is chosen as the solvent for precursor salts. We systematically study the effect of the types of anti-solvents and the amount of ligands on the size and morphology of the resulting PNCs. Interestingly, both layered Cs4CuSb2Cl12 double perovskites and cubic Cs2CuSbCl6 double perovskites can be achieved by changing the amount of precursor of the Cs source during the synthesis. Taking advantage of the solution processability, smooth and dense perovskite nanocrystal films are successfully fabricated. The photovoltaic performance of Cs2CuSbCl6 double perovskites (device structure: ITO/PEDOT:PSS/PNCs/bathocuproine/Ag) is reported with an initial power conversion efficiency of 0.13%.

We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info