Selenides and Hybrid Halide Perovskites for Superconducting, Quantum and Optical Absorber Applications

The excitonic and multibody interactions in some semiconducting two-dimensional (2D) crystallites, their strain-dependent properties and pristine atomically flat interfaces, coupled with the ability to solution-process these materials, offer a rich playground to unveil fundamental physical mechanisms for exciting and innovative devices. Amongst these, the transition metal dichalcogenides (TMDCs), such as tungsten diselenide (WSe₂) and niobium diselenide (NbSe₂) are finding promise in nanoelectronics, optoelectronics, sensors and quantum photonics. On the other hand, halide perovskites in their 2D form exhibit equally intriguing optoelectronic properties for photo absorbers and solar cells. In this work, we have analysed the light-matter interactions in superconducting NbSe₂, semiconducting WSe₂ and 2D perovskites toward sensing devices enabled by quantum phenomena. Solution-processing of some of these 2D materials has provided a pathway to realize a rich plethora of flexible and bendable sensing devices which will also be discussed.