On 26-30 June 2023, Ivan Caño, Dr. Zacharie Jehl, Dr. Sergio Giraldo and Prof. Edgardo Saucedo attended and participated in the 11 th International Conference on Materials for Advanced Technologies (ICMAT 2023), which takes place biannually in Singapore.

ICMAT 2023 is the premier scientific platform to present research to an interdisciplinary and international audience. It provides a window on the future of materials science and offers an opportunity for researchers (from students and postdocs, to Nobel Laureates) to share expertise, exchange technical information and network with colleagues.

Ivan Caño presented his work “Solution-based synthesis of narrow bandgap anti-perovskite Ag-based chalcohalides for energy applications”, present a new procedure to synthesize Ag-based chalco-halides by a low-temperature solution-based methodology, using thiol-amine molecular precursor inks. Through this process, it has been possible to fabricate Ag3S(IxBr1-x) (x=0-1) films, which have been characterized by XRD, demonstrating the formation of the unique anti-perovskite structure. Optical characterization results were also presented, demonstrating bandgap values between 0.9 eV (Ag3SI) and 1.0 eV (Ag3SBr).

Prof. Edgardo Saucedo presented an invited talk: “The Steady Rise of Thin Film Photovoltaics Based on van der Waals Compounds with Low Dimensionality”. He discussed about recent progresses in quasi one-dimensional van der Waals materials such as (Sb,Bi)2(S,Se)3. The presentation introduced a novel family of materials based on mixed Sb and Bi chalco-halides [(Sb,Bi)(S,Se)(Br,I)]. The first part was devoted to reviewing the most relevant results reported so far, along with a deep review of the fundamental properties of these compounds obtained by DFT modelling. In the second part, the complexity of the synthesis of mixed chalco-halides was discussed, and a new methodology for their synthesis developed by the members of the SENSATE team (based on the combination of co-evaporation of chalcogenides and high-pressure reactive annealing under halogen atmosphere) was presented. The last part of the presentation was devoted to the
challenges and possible technological solutions of low-dimensional chalcohalide materials.

Prof. Saucedo, Dr. Jehl, Dr. Giraldo and Ivan had a great time discussing and spending time with researchers and students attending the conference. In their free time, they visited the impressive multi-cultural city state of Singapore, its parks and gardens, and they also experienced the local cultures and cuisine.