講演情報
[16a-W9_326-9]Compositional and Plasmonic Engineering of Lead-Free Cs3Bi2I9 for Enhanced Optoelectronic Performance
〇(DC)Anjana Yadav1, Akhilesh Kumar Singh1 (1.Banasthali Vidyapith)
キーワード：
Lead-free bismuth-based Perovskite、Plasmonic nanoparticles、Optoelectronics
Bismuth-based halide perovskites (HPs) have emerged as an environmentally friendly alternative compared to toxic lead-based HPs. This comparative study explores the effect of Ag substitution and plasmonic AgNPs on pristine Cs3Bi2I9 HPs. The Ag substitution modulates the bandgap from 1.78 eV to 1.7 eV, enhances the photoluminescence intensity by a factor of three, and promotes unidirectional crystal growth. Whereas the plasmonic AgNPs exhibit distinct optical properties owing to the localized surface plasmon resonance. The AgNPs integration with Cs3Bi2I9 HPs exhibits a reduced average lifetime, indicating increased charge transfer across the AgNPs and HPs interface. The as-fabricated photodetectors (PDs) with an active layer of Cs2.5Ag0.5Bi2I9, and Cs3Bi2I9 + Ag NPs exhibit significant enhancement in photocurrent in comparison to pristine PDs. The peak responsivity and specific detectivity of Cs3Bi2I9 + Ag NPs, Cs2.5Ag0.5Bi2I9, and Cs3Bi2I9-based PDs were found to be 2.1 mA/W and 1.03 × 1010 Jones, 1.3 mA/W and 1.73 × 1010 Jones, and 0.67 mA/W and 7.51 × 109 Jones at 400 nm, respectively.