Recent progress and prospective of zero-dimensional Cs₂B^(IV)X₆ lead-free double perovskite

Abstract

The zero-dimensional (0D) ordered lead-free double perovskites (DPs) Cs₂B^(IV)X₆ have recently been recognized as promising candidates in the optoelectronics domain. Their exceptional stability and environmentally benign nature position them as ideal alternatives to their toxic and unstable lead-based halide perovskite counterparts. Recent years have witnessed notable progress in the optical properties of Cs₂B^(IV)X₆, propelled by techniques such as ion doping, surface coating and ligand modification, which has been instrumental in broadening their applications in various optoelectronic domains. Herein, a comprehensive overview is provided on the recent progress regarding synthesis methods, optimization strategies, bandgap engineering, photoluminescence (PL) optimization, and device applications related to Cs₂B^(IV)X₆ materials. It also explores critical aspects including structural diversity, tunable emission, photophysical mechanisms, and material stability. Moreover, the review addresses the prevailing challenges in this field and outlines future research directions aimed at enhancing the photoluminescence quantum yield and stability of Cs₂B^(IV)X₆.

Keywords

double perovskites / ions doping / efficiency / stability / optoelectronic properties

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