Cesium-formamidinium (Cs-FA) perovskites have garnered widespread interest owing to their excellent thermal- and photostability in achieving stable perovskite solar cells (PSCs). However, Cs-FA perovskite typically suffers from Cs and FA mismatches, affecting the Cs-FA morphology and lattice distortion, resulting in an enlarged bandgap (E ). In this work, "upgraded" CsCl, Eu -doped CsCl quantum dots, are developed to solve the key issues in Cs-FA PSCs and also exploit the advantage of Cs-FA PSCs on stability. The introduction of Eu promotes the formation of high-quality Cs-FA films by adjusting the Pb-I cluster. CsCl:Eu also offsets the local strain and lattice contraction induced by Cs , which maintains the inherent E of FAPbI and decreases the trap density. Finally, a power conversion efficiency (PCE) of 24.13% is obtained with an excellent short-circuit current density of 26.10 mA cm . The unencapsulated devices show excellent humidity stability and storage stability, and an initial PCE of 92.2% within 500 h under continuous light illumination, and bias voltage conditions is achieved. This study provides a universal strategy to address the inherent issues of Cs-FA devices and maintain the stability of MA-free PSCs to satisfy future commercial criteria.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/adma.202302393 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Surface Structure of Lecithin-Capped Cesium Lead Halide Perovskite Nanocrystals Using Solid-State and Dynamic Nuclear Polarization NMR Spectroscopy.
ACS Nano
August 2024
Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada.
Inorganic colloidal cesium lead halide perovskite nanocrystals (NCs) encapsulated by surface capping ligands exhibit tremendous potential in optoelectronic applications, with their surface structure playing a pivotal role in enhancing their photophysical properties. Soy lecithin, a tightly binding zwitterionic surface-capping ligand, has recently facilitated the high-yield synthesis of stable ultraconcentrated and ultradilute colloids of CsPbX NCs, unlocking a myriad of potential device applications. However, the atomic-level understanding of the ligand-terminated surface structure remains uncertain.
View Article and Find Full Text PDFTrivalent Europium-Doped CsCl Quantum Dots for MA-Free Perovskite Solar Cells with Inherent Bandgap through Lattice Strain Compensation.
Adv Mater
October 2023
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China.
Cesium-formamidinium (Cs-FA) perovskites have garnered widespread interest owing to their excellent thermal- and photostability in achieving stable perovskite solar cells (PSCs). However, Cs-FA perovskite typically suffers from Cs and FA mismatches, affecting the Cs-FA morphology and lattice distortion, resulting in an enlarged bandgap (E ). In this work, "upgraded" CsCl, Eu -doped CsCl quantum dots, are developed to solve the key issues in Cs-FA PSCs and also exploit the advantage of Cs-FA PSCs on stability.
View Article and Find Full Text PDFSalt-flux growth of HoCuMg single crystals.
Dalton Trans
July 2023
Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstrasse 30, D-48149 Münster, Germany.
Polycrystalline samples of the magnesium-rich intermetallic compounds RECuMg (RE = Dy, Ho, Er, Tm) were synthesized by reaction of the elements in sealed tantalum ampoules heated in a high-frequency induction furnace. Phase purity of the RECuMg phases was ascertained by powder X-ray diffraction patterns. Well-shaped single crystals of HoCuMg could be grown in a NaCl/KCl salt flux and the crystal structure was refined from single crystal X-ray diffraction data: TbCuMg structure-type, space group , = 1361.
View Article and Find Full Text PDFRoom-Temperature Solid-State Synthesis of CsCuI Thin Films and Formation Mechanism for Its Unique Local Structure.
J Am Chem Soc
May 2023
MDX Research Center for Element Strategy, International Research Frontiers Initiative, Tokyo Institute of Technology, Yokohama 226-8503, Japan.
Blue-emitting CsCuI has attracted attention owing to its near-unity PL quantum yield and applications in DUV photodetectors and scintillators. Its PL properties originate from the unique local structure around the luminescent center, the [CuI] polyhedron iodocuprate anion consisting of the edge-shared CuI triangle and the CuI tetrahedron dimer, which is isolated by Cs ions. We found that solid-state reactions between CsI and CuI occur near room temperature (RT) to form CsCuI and/or CsCuI phases.
View Article and Find Full Text PDFHigh-Performance Quasi-Two-Dimensional CsPbBrCl:PEABr Perovskite Sky-Blue LEDs with an Interface Modification Layer.
Nanoscale Res Lett
July 2022
Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei, Taiwan.
This paper elucidates the increased luminescence efficiency of CsPbBrCl sky-blue perovskite light-emitting diodes (PeLEDs) achieved through the interface modification of 3,4 ethylenedioxythiophene (PEDOT):polystyrene sulfonic acid (PSS)/quasi-two-dimensional (QTD) perovskite using CsCl and CsBr materials, respectively. QTD films were fabricated using ratios of CsPbBrCl doped with phenethylamine hydrobromide (PEABr) at 60%, 80%, and 100%. The solvent dimethyl sulfide (CHOS) was employed under the excitation of ambient and 365-nm laser lights.
View Article and Find Full Text PDFWant 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!