Work

Air-Stable Thin Films of Tin Halide Perovskite Nanocrystals by Polymers and Al2O3 Encapsulation

Year: 2024

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide Tin halide perovskites are promising for optoelectronics, although their sensitivity to ambient conditions due to Sn(II) oxidation presents a challenge. Encapsulation techniques can mitigate degradation and facilitate advanced studies of the intrinsic properties. To study and improve the ambient stability of CsSnBr 3 and CsSnI 3 nanocrystal (NC) thin films, we explored various encapsulation methods: organic, inorganic, and hybrid. We employed three methods for organic encapsulation: co-deposition with NCs, co-deposition with an additional top layer, and in situ polymerization with NCs. We synthesized thin layers of alumina by using atomic layer deposition for inorganic encapsulation. While individual methods offered marginal improvements, the hybrid approach provided the best results. By employing a hybrid heterostructured thin-film strategy, with the NC layer covered by a thin layer of poly(methyl methacrylate) followed by a 40 nm alumina layer, the stability in air was improved from a few seconds to a record period of 15 days, a crucial advancement for the further exploration of tin halide perovskites.

Source: Chemistry of Materials

DOI: 10.1021/acs.chemmater.4c02261

Authors: Kushagra Gahlot, Lorenzo di Mario, Rixt Bosma, Maria A. Loi, Loredana Protesescu

Institutions: University of Groningen, Zernike Institute for Advanced Materials

Language: English

Topic: Perovskite Materials and Applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,500