Noble Metals Doping in Lead-Free Double Perovskite Single Crystals: Achieving Near-Infrared to X-ray Broadband Photodetection.

ABSTRACT: Semiconductor materials capable of broadband photodetection, spanning X-rays to near-infrared (NIR), are essential for applications in medical imaging, industrial inspection, security, and telecommunications. Conventional photodetectors like Si, Ge, InGaAs, and amorphous Se (a-Se) often encounter tradeoffs in efficiency or cost-effectiveness. Halide perovskites (HPs) offer competitive or superior optoelectronic properties with low-cost, solution-based processing. However, lead-based HPs pose toxicity and stability challenges, while lead-free tin-based HPs suffer from Sn2+ oxidation and structural degradation. The lead-free double perovskite Cs2AgBiBr6 has emerged as a stable, nontoxic alternative for X-ray and visible-light photodetection. Despite its advantages, its high bandgap (≈1.9 eV)

SUBMITTER: Valli D 

PROVIDER: S-EPMC12362788 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature