Controllable Growth of Preferential (110)-Oriented MAPbBr3 Single Crystals via Additive Engineering for X-Ray Detection
4 affiliations
- 1Shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology, Center for Intense Laser Application Technology (iLaT), Shenzhen Technology University, Shenzhen 518118, China
- 2College of Engineering Physics, Shenzhen Technology University, Shenzhen 518118, China
- 3School of Optoelectronic Engineering, Xidian University, Xi’an 710071, China
- 4Engineering and Research Center for Integrated New Energy Photovoltaics & Energy Storage Systems of Hunan Province, School of Electrical Engineering, University of South China, Hengyang 421001, China
Abstract
Metal halide perovskite single crystals stand out for their exceptional optoelectronic properties, and targeted facet regulation is a key pathway to further elevate their device performance by leveraging the anisotropic characteristics of different crystallographic planes. However, existing protocols for preferentially growing (110)-faceted MAPbBr3 single crystals require precise stoichiometric control, complex temperature programming, or time-consuming processes, hindering their reproducible and scalable fabrication. In this work, we develop a facile seed-assisted isothermal solvent evaporation strategy to prepare MAPbBr3 single crystals with preferential (110) facet exposure, using isopropyl alcohol (IPA) as a multifunctional growth additive at a fixed temperature of 47 °C. Experiments and theoretical calculations reveal that the three synergistic roles of IPA—surface coordination to stabilize growth kinetics, solubility-induced reduction in the effective MABr/PbBr2 ratio, and facet-selective adsorption to modulate relative growth rates—collectively enable the controlled growth of MAPbBr3 SCs with large-area (110) facet exposure. The as-prepared (110)-faceted crystals exhibit lower defect density and longer carrier lifetimes than their conventional (100)-faceted counterparts. When assembled into X-ray detectors, the (110)-based devices deliver a sensitivity of 10,532.9 μC Gyair−1 cm−2 and a limit of detection of 0.18 μGyair s−1, corresponding to a ~3.7-fold sensitivity improvement and a 45-fold detection limit reduction relative to (100)-based devices. This work provides a reliable and facile approach for perovskite single-crystal facet engineering and advances the development of low-dose, high-sensitivity X-ray detection technology.
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BibTeX
@article{liu2026controllable,
title = {{Controllable Growth of Preferential (110)-Oriented MAPbBr3 Single Crystals via Additive Engineering for X-Ray Detection}},
author = {Guanhao Liu and Chuanyun Hao and Bin Zhang and Shengyu Dai and Guowei Zhu and Shengqiao Zeng and Xingzhu Wang and Zhang Qu and Bin Xue and Shuang Xiao},
journal = {Inorganics},
year = {2026},
month = oct,
doi = {10.3390/inorganics14100258},
url = {https://www.mdpi.com/2304-6740/14/10/258},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Controllable Growth of Preferential (110)-Oriented MAPbBr3 Single Crystals via Additive Engineering for X-Ray Detection
AU - Guanhao Liu
AU - Chuanyun Hao
AU - Bin Zhang
AU - Shengyu Dai
AU - Guowei Zhu
AU - Shengqiao Zeng
AU - Xingzhu Wang
AU - Zhang Qu
AU - Bin Xue
AU - Shuang Xiao
PY - 2026
DA - 2026/10/03
JO - Inorganics
DO - 10.3390/inorganics14100258
UR - https://www.mdpi.com/2304-6740/14/10/258
AB - Metal halide perovskite single crystals stand out for their exceptional optoelectronic properties, and targeted facet regulation is a key pathway to further elevate their device performance by leveraging the anisotropic characteristics of different crystallographic planes. However, existing protocols for preferentially growing (110)-faceted MAPbBr3 single crystals require precise stoichiometric control, complex temperature programming, or time-consuming processes, hindering their reproducible and scalable fabrication. In this work, we develop a facile seed-assisted isothermal solvent evaporation strategy to prepare MAPbBr3 single crystals with preferential (110) facet exposure, using isopropyl alcohol (IPA) as a multifunctional growth additive at a fixed temperature of 47 °C. Experiments and theoretical calculations reveal that the three synergistic roles of IPA—surface coordination to stabilize growth kinetics, solubility-induced reduction in the effective MABr/PbBr2 ratio, and facet-selective adsorption to modulate relative growth rates—collectively enable the controlled growth of MAPbBr3 SCs with large-area (110) facet exposure. The as-prepared (110)-faceted crystals exhibit lower defect density and longer carrier lifetimes than their conventional (100)-faceted counterparts. When assembled into X-ray detectors, the (110)-based devices deliver a sensitivity of 10,532.9 μC Gyair−1 cm−2 and a limit of detection of 0.18 μGyair s−1, corresponding to a ~3.7-fold sensitivity improvement and a 45-fold detection limit reduction relative to (100)-based devices. This work provides a reliable and facile approach for perovskite single-crystal facet engineering and advances the development of low-dose, high-sensitivity X-ray detection technology.
SN - 2304-6740
ER -