Lead-Free Layered Perovskites Boost Optoelectronics

Perovskite materials have emerged as promising candidates for next-generation solar cells, light-emitting diodes, and photodetectors because of their remarkable optical and electronic properties. However, the widespread use of lead-containing perovskites has raised environmental and sustainability concerns. Lead-free halide double perovskites offer an attractive alternative, but their performance is strongly influenced by complex structural, electronic, and defect-related factors.

In this review, Soo-Yeon Yang and Hyojung Kim examine recent advances in 2D and quasi-2D LFHDPs, focusing on how structural design translates into material properties and ultimately device performance. The review goes beyond a conventional classification of perovskite compositions by establishing a structure-property-device performance framework.