Engineering Large‐Grain Metal Halide Perovskite Films via Chemical Vapor Deposition for High‐Performance, Ultralow‐Noise Perovskite Photodetectors
4 affiliations
- 1Molecular Imaging and Photonics, Department of Chemistry KU Leuven Leuven Belgium
- 2Max‐Planck‐Institute for Polymer Research Mainz Germany
- 3Fakultät Physik/DELTA Technische Universität Dortmund Dortmund Germany
- 4Henan University Zhengzhou China
Abstract
Metal halide perovskites have emerged as promising semiconductors for high‐performance photodetectors and X‐ray sensors due to their high‐Z composition, excellent charge transport, and intrinsic defect tolerance. However, scalable fabrication of thick, pinhole‐free films with controlled crystallinity and long‐term stability remains challenging, limiting their device performance. Here, we demonstrate the chemical vapor deposition of large‐grain, phase‐pure CsPbBr3 films with thicknesses of ∼3 µm and grain sizes up to 35 µm, an order of magnitude larger than those obtained by conventional spin coating. By optimizing deposition parameters and substrate selection, we achieve smooth, uniform films with prolonged carrier decay times and enhanced charge transport, as evidenced by time‐resolved photoluminescence and Drude‐like behavior in terahertz photoconductivity measurements. Photodetectors based on these films exhibit ultralow dark currents (<1 pA cm− 2 at 0 V), high switching ratios (∼104), responsivities up to 0.176 A W− 1, and detectivities of 8.4 × 101 2 Jones, while maintaining exceptional operational and ambient stability over one year. X‐ray sensitivity measurements further confirm the potential of these devices for low‐dose detection applications. This work establishes CVD as a reproducible, solvent‐free route to high‐quality halide perovskite films, providing a clear pathway to next‐generation photodetectors and X‐ray sensors with superior performance and long‐term stability.
Related
- Enhanced UV-C Detection Performance of Perovskite Photodetectors via Controlled Surface Patterning
- Printed High-Performance Visible-Light Photodetectors Using CsPbBr3 Perovskite Quantum Dots and Integrated Lithography
- Fluorite–Perovskite Heterointerface Engineering Boosts CO2 Electrolysis Performance in Solid Oxide Electrolysis Cells
- Engineering efficient RbGeCl3 perovskite solar cells: A simulation-driven computational approach to performance optimization
- Perovskite Nanocrystal-Based Scintillators: Synthesis Routes, Matrix Engineering, and Performance Optimization for Radiation Detection
BibTeX
@article{brande2026engineering,
title = {{Engineering Large‐Grain Metal Halide Perovskite Films via Chemical Vapor Deposition for High‐Performance, Ultralow‐Noise Perovskite Photodetectors}},
author = {Roel Vanden Brande and Sudipta Seth and Lei Gao and Bapi Pradhan and Dilkhush Khicher and Anastasiia Bazylevska and Wei Qu and Christian Sternemann and Hai Wang and Steven De Feyter and Weidong Xu and Fei Zhang and Mischa Bonn and Johan Hofkens and Elke Debroye},
journal = {Advanced Science},
year = {2026},
month = aug,
doi = {10.1002/advs.77049},
url = {https://doi.org/10.1002/advs.77049},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Engineering Large‐Grain Metal Halide Perovskite Films via Chemical Vapor Deposition for High‐Performance, Ultralow‐Noise Perovskite Photodetectors
AU - Roel Vanden Brande
AU - Sudipta Seth
AU - Lei Gao
AU - Bapi Pradhan
AU - Dilkhush Khicher
AU - Anastasiia Bazylevska
AU - Wei Qu
AU - Christian Sternemann
AU - Hai Wang
AU - Steven De Feyter
AU - Weidong Xu
AU - Fei Zhang
AU - Mischa Bonn
AU - Johan Hofkens
AU - Elke Debroye
PY - 2026
DA - 2026/08/10
JO - Advanced Science
DO - 10.1002/advs.77049
UR - https://doi.org/10.1002/advs.77049
AB - Metal halide perovskites have emerged as promising semiconductors for high‐performance photodetectors and X‐ray sensors due to their high‐Z composition, excellent charge transport, and intrinsic defect tolerance. However, scalable fabrication of thick, pinhole‐free films with controlled crystallinity and long‐term stability remains challenging, limiting their device performance. Here, we demonstrate the chemical vapor deposition of large‐grain, phase‐pure CsPbBr3 films with thicknesses of ∼3 µm and grain sizes up to 35 µm, an order of magnitude larger than those obtained by conventional spin coating. By optimizing deposition parameters and substrate selection, we achieve smooth, uniform films with prolonged carrier decay times and enhanced charge transport, as evidenced by time‐resolved photoluminescence and Drude‐like behavior in terahertz photoconductivity measurements. Photodetectors based on these films exhibit ultralow dark currents (<1 pA cm− 2 at 0 V), high switching ratios (∼104), responsivities up to 0.176 A W− 1, and detectivities of 8.4 × 101 2 Jones, while maintaining exceptional operational and ambient stability over one year. X‐ray sensitivity measurements further confirm the potential of these devices for low‐dose detection applications. This work establishes CVD as a reproducible, solvent‐free route to high‐quality halide perovskite films, providing a clear pathway to next‐generation photodetectors and X‐ray sensors with superior performance and long‐term stability.
SN - 2198-3844
ER -