In this talk I will present our latest activities in the field of nanomaterials for integrated optoelectronics with emphasis on the best candidates for convergence with light detection (solar cells), biosensing and resistive memories (memristors). I will first address nanomaterials and basic devices for optoelectronics, which we believe are the basis and the core for solving many new societal challenges. Silicon nanocrystals (Si-nc) in the form of superlattices can be used for fabricating tandem solar cells with improved efficiency over silicon ones. At the same time, Si-nc embedded in dielectrics are routinely used as low-power light emitters with good possibilities for integration with silicon technology. More exotic combinations like for instance i) Multilayered nanostructures with Al and rare earths sandwiched between SiO₂ walls and ii) Quaternary compounds with variable composition such as SiAlON, have shown amazing properties aiming at light emission in the visible, and have also demonstrated behavior as memory resistors (memristors). In the field of biosensing, we have recently shown that we can take advantage of nanostructured ITO electrodes for general purpose amperometric biosensors. Finally, we will also show that ZnO based materials in the form of layers and/or quantum dot/wires can be used for convergence as they demonstrate in elemental devices light emission, light detection, biosensing and memristive properties.