Ultra-dense 2D material based photodetector arrays on flexible substrates

2D materials and specifically Transition Metal Dichalcogenides have received much attention as photoactive materials in photodetectors. These materials possess attractive properties, including a direct bandgap in the visible range and mechanical resilience to strain, making them an attractive material for flexible photodetectors. Here we demonstrate 4x4 pixel photodetector arrays on flexible and non-flexible substrates based on mechanically exfoliated flakes of MoS2. The arrays have a minimum pitch between array pixels of 9.5 µm in both vertical and horizontal directions. Demonstrating, to our knowledge, the densest 2D material based photodetector array to date.