Intersubband Transitions in Lead Halide Perovskite-Based Quantum Wells for Mid-Infrared Detectors

TL;DR

This paper models intersubband transitions in lead halide perovskite quantum wells, demonstrating their potential for tunable mid-infrared detectors due to high absorption and adjustable energy levels.

Contribution

It provides a theoretical analysis of intersubband transitions in lead halide perovskite quantum wells, highlighting their suitability for infrared photodetector applications.

Findings

Transition energies can be tuned by adjusting well and barrier thicknesses.

Lead halide perovskite quantum wells exhibit high absorption coefficients.

Potential for broad infrared wavelength coverage.

Abstract

Due to their excellent optical and electrical properties as well as versatile growth and fabrication processes, lead halide perovskites have been widely considered as promising candidates for green energy and opto-electronic related applications. Here, we investigate their potential applications at infrared wavelengths by modeling the intersubband transitions in lead halide perovskite-based quantum well systems. Both single-well and double-well structures are studied and their energy levels as well as the corresponding wavefunctions and intersubband transition energies are calculated by solving the one-dimensional Schr\"odinger equations. By adjusting the quantum well and barrier thicknesses, we are able to tune the intersubband transition energies to cover a broad range of infrared wavelengths. We also find that the lead-halide perovskite-based quantum wells possess high absorption coefficients, which are beneficial for their potential applications in infrared photodetectors. The widely tunable transition energies and high absorption coefficients of the perovskite-based quantum well systems, combined with their unique material and electrical properties, may enable an alternative material system for the development of infrared photodetectors.