Perovskite Multiple Quantum Well Superlattices: Potentials and Challenges

The rapid advancement of metal halide perovskites has sparked interest in strategies for manipulating their optoelectronic characteristics. In the ambit of group III–V materials, multiple quantum well (MQW) superlattices have previously demonstrated unique and advantageous photophysical properties, driving record efficiencies in both photovoltaic and light emission devices. Recently, perovskite-based MQWs have become feasible, owing to significant progress in physical vapor deposition techniques. In this Perspective, we outline the desirable optoelectronic traits of MQWs, some observed in established semiconductors and the few examples of perovskite-based ones. We elucidate the associated advantages and explore their potential prospects. Finally, we discuss some potential challenges that may be encountered in the pursuit of seamless integration of perovskite MQWs into efficient devices.