Details

Autor(en) / Beteiligte

• Brennan, Michael C
• Kuno, Masaru
• Rouvimov, Sergei

Titel

Crystal Structure of Individual CsPbBr3 Perovskite Nanocubes

Ist Teil von

• Inorganic chemistry, 2019-01, Vol.58 (2), p.1555-1560

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The atomic structure of CsPbBr3 nanocubes (NCs) was studied at the single-particle level via a high-resolution transmission electron microscopy (HRTEM) defocus-series analysis. The technique entails acquiring lattice-resolved HRTEM images of individual NCs over progressive defocus values. CsPbBr3 NC atomic structure was evaluated by comparing acquired experimental data to simulated lattice-resolved images and corresponding Fourier transform patterns of both orthorhombic (Pnma) and cubic (Pm3̅m) CsPbBr3 polymorphs. Herein, CsPbBr3 NCs with average edge lengths (l) of l ∼ 10 and 5 nm are analyzed using the aforementioned technique. In the former, we find evidence for the coexistence of both cubic and orthorhombic lattices. In the latter, solely cubic character is observed, illustrating a potential size dependency to the crystal symmetry of CsPbBr3 NCs. Such structural measurements provide critical insight into elucidating the structure/(optical and electrical) function relationship of CsPbBr3 NCs.