Nanometric Chemical Analysis of Beam‐Sensitive Materials: A Case Study of STEM‐EDX on Perovskite Solar Cells DOI Creative Commons
Felix Utama Kosasih, Stéfania Cacovich, Giorgio Divitini

et al.

Small Methods, Journal Year: 2020, Volume and Issue: 5(2)

Published: Nov. 17, 2020

Quantitative chemical analysis on the nanoscale provides valuable information materials and devices which can be used to guide further improvements their performance. In particular, emerging families of technologically relevant composite such as organic-inorganic hybrid halide perovskites metal-organic frameworks stand benefit greatly from characterization. However, these nanocomposites are also vulnerable damage induced by analytical probes electron, X-ray, or neutron beams. Here effect electrons a model perovskite is investigated, focusing acquisition parameters appropriate for energy-dispersive X-ray spectroscopy in scanning transmission electron microscope (STEM-EDX). The systematically varied examine relationship between dose, data quality, beam damage. Five metrics outlined assess quality STEM-EDX severity damage, validated dark field STEM imaging. Loss iodine through vacancy creation found primary manifestation specimen, content seen decrease exponentially with dose. This work demonstrates strategies that studying achieving reliable quantification broad range beam-sensitive materials.

Language: Английский

Toolsets for assessing ionic migration in halide perovskites DOI
Natalia Yantara, Nripan Mathews

Joule, Journal Year: 2024, Volume and Issue: 8(5), P. 1239 - 1273

Published: March 18, 2024

Language: Английский

Citations

15
Imaging Electron Beam-Sensitive Twisted Hybrid Perovskite Bilayers at One-Angstrom Resolution DOI

Yuan Lu,

Hongsheng Shi, Shuchen Zhang

et al.

ACS Nano, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

Twisted halide perovskite bilayers, a type of moiré material, show square patterns with exciting optical properties. Atomic-scale structure analysis and its correlation properties are difficult to achieve due the extreme sensitivity organic–inorganic perovskites illuminated electron beam in conventional/scanning transmission microscopy. Here, we developed low-dose exit wave reconstruction methodology real-space resolution one angstrom at ∼50 e/Å2, which recovers phase information on fringes CH3NH3PbI3 (MAPbI3) twisted bilayers atomic scale, enabling detailed structural defects corresponding strain distribution such materials. This work provides an atomic-level understanding beam-sensitive bilayer

Language: Английский

Citations

1
In Situ Characterization for Understanding the Degradation in Perovskite Solar Cells DOI
Xin Meng, Minghao Yin, Shasha Zhang

et al.

Solar RRL, Journal Year: 2022, Volume and Issue: 6(7)

Published: April 15, 2022

In the past decade, organic–inorganic hybrid perovskite solar cells (PSCs) have made unprecedented progress and recently achieved high efficiency of over 25%, comparable with commercial silicon cells. However, PSCs still face poor long‐term stability hindering their application. Because undergo severe degradation under environmental stress factors, such as moisture, heat, light, electrical bias. Thus, exploring evaluating pathways perovskites mechanisms is quite essential. situ diagnostic techniques can track real‐time changes structure, morphology, optoelectronic properties materials in device during process. Herein, on characterization for understanding reviewed, including advanced aspects electron microscopy, X‐Ray, spectroscopy. Besides, tracking process material films from typical methylamine (MA) to formamidinium (FA)–cesium (Cs) mixed‐cation dependent external factors also discussed. This overview provide a further solve problems road commercialization. Finally, future perspectives are provided at end this review.

Language: Английский

Citations

32
Perovskite micro-/nanoarchitecture for photonic applications DOI Creative Commons
Yang Liu, Fushan Li, Wei Huang

et al.

Matter, Journal Year: 2023, Volume and Issue: 6(10), P. 3165 - 3219

Published: June 25, 2023

Language: Английский

Citations

17
Surface‐Engineered Methylammonium Lead Bromide Single Crystals: A Platform for Fluorescent Security Tags and Photodetector Applications DOI Creative Commons
Somnath Mahato, Magdalena Tamulewicz‐Szwajkowska, Sudarshan Singh

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(10)

Published: Jan. 31, 2024

Abstract Surface/interface engineering of methylammonium lead bromide (MAPbBr 3 ) single crystals (SCs) is crucial for carrier generation/recombination, separation, and transportation, thereby enabling superior optoelectronics. Herein, a surface‐engineered crystallization technique presented in which thin polycrystalline MAPbBr layer situ grown on the surface bulk mm‐sized SCs. The growth direction atomic distribution both crystalline core have been analyzed by damage‐free atomic‐resolution transmission electron microscopy (TEM). nature gives rise to bright green emission under UV light. Scanning probe results show that current at emissive film/MAPbBr SC five times higher than non‐emissive when illuminated. Lateral photodetectors based SCs can achieve excellent detectivities (≈10 13 Jones) high photoresponsivities (≈20 A W −1 ). Furthermore, semiconductor‐based fluorescence quick response (FQR) code patterned same green‐emitting using picosecond laser pulse, with scalability × mm 2 . An FQR integrated photodetector may serve as potential double security tag bank cards, passports, door security, etc.

Language: Английский

Citations

7
One-step precipitated all-inorganic perovskite QDs from amorphous media for backlighting display and reproducible laser-driven white lighting DOI
Ze Yang, Hao Zhang,

Zhaohui Fang

et al.

Chemical Engineering Journal, Journal Year: 2021, Volume and Issue: 427, P. 131379 - 131379

Published: Aug. 12, 2021

Language: Английский

Citations

34
Nacre inspired robust self-encapsulating flexible perovskite photodetector DOI
Yan Zhan, Qunfeng Cheng,

Jingsong Peng

et al.

Nano Energy, Journal Year: 2022, Volume and Issue: 98, P. 107254 - 107254

Published: April 12, 2022

Language: Английский

Citations

21
Phase offset method of ptychographic contrast reversal correction DOI Creative Commons
Christoph K. Hofer, Chuang Gao, Tamazouzt Chennit

et al.

Ultramicroscopy, Journal Year: 2024, Volume and Issue: 258, P. 113922 - 113922

Published: Jan. 8, 2024

The contrast transfer function of direct ptychography methods such as the single side band (SSB) method are signed, yet these still sometimes exhibit reversals, most often where projected potentials strong. In thicker samples central focusing provides best ptychographic this leads to defocus variations within sample canceling out. However away from entrance surface is undesirable degrades annular dark field (ADF) signal. Here we discuss how phase wrap asymptotes in frequency response SSB give rise without need for dynamical scattering, and can be counteracted by manipulating phases that either shifted higher frequencies or damped via amplitude modulation. This what enables post collection correction reversals. However, offset counteracting reversals introduce here generally found superior application defocus, with greater reliability stronger contrast. Importantly, also works thin thick does not. Finally, independence focus useful optical sectioning involving ptychography, improving interpretability better disentangling effects strong focus.

Language: Английский

Citations

4
Unveiling the Interaction Mechanisms of Electron and X‐ray Radiation with Halide Perovskite Semiconductors using Scanning Nanoprobe Diffraction DOI Creative Commons
Jordi Ferrer Orri, Tiarnan A. S. Doherty, Duncan N. Johnstone

et al.

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(18)

Published: March 15, 2022

The interaction of high-energy electrons and X-ray photons with beam-sensitive semiconductors such as halide perovskites is essential for the characterization understanding these optoelectronic materials. Using nanoprobe diffraction techniques, which can investigate physical properties on nanoscale, studies electron radiation state-of-the-art (FA0.79 MA0.16 Cs0.05 )Pb(I0.83 Br0.17 )3 hybrid perovskite films (FA, formamidinium; MA, methylammonium) are performed, tracking changes in local crystal structure a function fluence using scanning synchrotron nano techniques. Perovskite grains identified, from additional reflections, corresponding to PbBr2 , appear crystalline degradation phase after fluences 200 e- Å-2 . These concomitant formation small PbI2 crystallites at adjacent high-angle grain boundaries, pinholes, transition tetragonal cubic. A similar pathway caused by photon irradiation nano-X-ray diffraction, suggesting common underlying mechanisms. This approach explores limits materials provides description pathways nanoscale. Addressing boundaries will be critical further improvement polycrystalline film stability, especially applications vulnerable space photovoltaics.

Language: Английский

Citations

19
Direct Patterning of CsPbBr3 Nanocrystals via Electron-Beam Lithography DOI Creative Commons
Christian D. Dieleman,

Julia van der Burgt,

Neha Thakur

et al.

ACS Applied Energy Materials, Journal Year: 2022, Volume and Issue: 5(2), P. 1672 - 1680

Published: Jan. 18, 2022

Lead-halide perovskite (LHP) nanocrystals have proven themselves as an interesting material platform due to their easy synthesis and compositional versatility, allowing for a tunable band gap, strong absorption, high photoluminescence quantum yield (PLQY). This tunability performance make LHP optoelectronic applications. Patterning active materials like these is useful way expand applicability it may allow more intricate designs that can improve efficiencies or increase functionality. Based on technique II-VI dots, here we pattern colloidal using electron-beam lithography (EBL). We create patterns of the order 100s nanometers several microns use form designs. The patterning mechanism induced by ligand cross-linking, which binds adjacent together. find luminescent properties are somewhat diminished after exposure, but structures nonetheless still emissive. believe this step toward at nanoscale device fabrication.

Language: Английский

Citations

17