Tin halide perovskites are rising as promising materials for lead-free perovskite solar cells (PSCs). However, the crystallization rate of tin halide perovskites is much faster than the lead-based analogs, leading to more rampant trap states and lower efficiency. Here, we disclose a key finding to modulate the crystallization kinetics of FASnI through a non-classical nucleation mechanism based on pre-nucleation clusters (PNCs). By introducing piperazine dihydriodide to tune the colloidal chemistry of the FASnI perovskite precursor solution, stable clusters could be readily formed in the solution before nucleation. These pre-nucleation clusters act as intermediate phase and thus can reduce the energy barrier for the perovskite nucleation, resulting in a high-quality perovskite film with lower defect density. This PNCs-based method has led to a conspicuous photovoltaic performance improvement for FASnI -based PSCs, delivering an impressive efficiency of 11.39 % plus improved stability.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/anie.202012280 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Theoretical and Experimental Research on the Short-Range Structure in Gallium Melts Based on the Wulff Cluster Model.
Materials (Basel)
December 2024
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, China.
In this paper, the short-range ordering structures of Ga melts has been investigated using the Wulff cluster model (WCM). The structures with a Wulff shape outside and crystal symmetry inside have been derived as the equivalent system to describe the short-range-order (SRO) distribution of the Ga melts. It is observed that the simulated HTXRD patterns of the Ga WCM are in excellent agreement with the experimental data at various temperatures (523 K, 623 K, and 723 K).
View Article and Find Full Text PDFEfficient Blade-Coated Wide-Bandgap and Tandem Perovskite Solar Cells via a Three-Step Restraining Strategy.
Adv Mater
November 2024
Key Lab of Artificial Micro- and Nano-Structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan, 430072, China.
Article Synopsis
- Blade-coating techniques for perovskite solar cells (PSCs) are appealing due to their efficiency in precursor use and ease of application, but they struggle with lower power conversion efficiency (PCE) compared to spin-coated cells because of issues in controlling film formation.
- A new three-step strategy using glycine amide hydrochloride has been developed to improve perovskite film quality by managing pre-nucleation and crystallization processes, resulting in better crystal formation and reduced defects.
- The enhanced blade-coated PSCs achieved a maximum PCE of 19.97%, and two-terminal tandem cells using this method reached a stabilized PCE of 26.87%, demonstrating potential for high-performance solar energy devices.
Resolving heterogeneous particle mobility in deeply quenched liquid iron: an ultra-fast assembly-free two-step nucleation mechanism.
Phys Chem Chem Phys
October 2024
Centre for Energy Research, HUN-REN, Research Institute for Technical Physics and Material Science, Dept. of Nanostructures, Konkoly Thege u. 29-33, Budapest, Hungary.
Despite intensive research, little is known about the intermediate state of phase transforming materials, which may form the missing link between liquids and solids on the nanoscale. The unraveling of the nanoscale interplay between the structure and dynamics of the intermediate state of phase transformations (through which crystal nucleation proceeds) is one of the biggest challenges and unsolved problems of materials science. Here we show using unbiased molecular dynamics simulations and spatially resolved atomic displacement maps (d-maps) that upon deep quenching the solidification of undercooled liquid iron proceeds through the formation of metastable pre-nucleation clusters (PNCs).
View Article and Find Full Text PDFColloidal pathways of amorphous calcium carbonate formation lead to distinct water environments and conductivity.
Nat Commun
January 2024
Department of Chemistry, University of Konstanz, Universitätsstr. 10, 78464, Konstanz, Germany.
CaCO is the most abundant biomineral and a major constituent of incrustations arising from water hardness. Polycarboxylates play key roles in controlling mineralization. Herein, we present an analytical and spectroscopic study of polycarboxylate-stabilized amorphous CaCO (ACC) and its formation via a dense liquid precursor phase (DLP).
View Article and Find Full Text PDFMesoscale Clusters in the Crystallisation of Organic Molecules.
Angew Chem Int Ed Engl
March 2024
Chemical Sciences Department, SSPC, The Science Foundation Ireland Research Centre for Pharmaceuticals, Bernal Institute, University of Limerick Castletroy, Limerick, V94 T9PX, Ireland.
Article Synopsis
- The initial phases of molecular self-assembly are crucial for determining the purity and properties of organic materials.
- This review highlights the importance of organic mesoscale clusters in the nucleation process and examines how their properties can be affected by sample treatment.
- It discusses various detection methods used in research, such as light scattering and microscopy, and emphasizes the potential of these clusters to aid in discovering new crystal forms, especially for complex pharmaceutical ingredients.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!