Pure Blue Perovskites Nanocrystals in Glass: Ultrafast Laser Direct Writing and Bandgap Tuning

Abstract

Chemical engineering in lead halide perovskite nanocrystals (PNCs) has garnered significant attention for tailoring optoelectronic properties, such as bandgap, quantum yield (QY), and stability. Here, pure blue emissive PNCs in glass by using ultrafast laser are reported. The emission wavelength is tuned in the range from 461 to 520 nm by engineering the chemical composition in the B-site Cd/Pb mix-cation system. The photoluminescence (PL) QY of CsCd x Pb 1−x Br 3 PNCs reaches 13.4% for the pure blue emission at 467 nm, which is twice that of CsPbBr y Cl 3−y PNCs. The pure blue emissive PNCs exhibit remarkable stability when exposed to ultraviolet (UV) radiation, heat, and ethanol solvents. The ultrafast laser print patterns can be encrypted and decrypted for information, which shows great potential for crucial information security applications. These results imply that B-site engineering for lead halide PNCs embedded in glass is effective to tailor the PL spectra and increase the PL QY. The pure blue emissive PNCs hold great potential in the applications of blue and full-color emissive devices.

Laser Technology for Perovskite: Fabrication and Applications

“…Reproduced with permission. [ 55 ] Copyright 2023, WILEY‐VCH f) Schematic illustrations of one‐step precipitation of CsPbBr 3 QDs and lattices thermal expansion in heating‐cooling cycle. Reproduced under the terms of the Creative Commons Attribution (CC BY) license.…”

Direct Lithography of Perovskite Quantum Dots Inside an Organic Transparent Medium

“…In recent years, crystallization of perovskite quantum dots (PQDs) inside a glass medium using a femtosecond laser has been extensively researched. − Perovskite nanocrystals induced by femtosecond laser in a solid transparent medium could possess the advantages of both crystalline materials and homogeneous medium . Transparent nanocrystal-in-glass composite combined the attractive spectroscopic properties of nanocrystals and the high transparency, extreme stability, and flexible processing properties of glass. − PQDs with variable chemical compositions and different luminescence properties have been fabricated inside glass media .…”

Highly efficient luminescent solar concentrators based on selective laser-induced crystallization in CsPbBrxCl3−x (x = 0–3) doped glass

“…Perovskite NCs embedded in glass can have their PL spectrum effectively adjusted and their photoluminescence quantum yield (PL QY) improved by using B-position engineering. 42 However, the research in the field of photovoltaics with fs laser-induced perovskite NCs in glass is still in its early stages and requires further investigation.…”