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Jiang W, Li H, Xing Z, Zhao Y, Liu D, Di H, Zhao C, Liu Y, Zhao Y. PEAI Surface Treatment for Low Ion Migration and High-Performance FAPbBr 3 Single-Crystal X-ray Detectors. ACS APPLIED MATERIALS & INTERFACES 2024; 16:51630-51638. [PMID: 39269916 DOI: 10.1021/acsami.4c09253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/15/2024]
Abstract
Organometal halide perovskite single crystals (SCs) are the most promising candidates for the next generation of radiation detection materials. However, surface defects severely affect their detection performance and limit further applications. Here, we identified the surface defect types of FAPbBr3 SCs and employed phenethylammonium iodide (PEAI) solution to treat the crystal surface and to investigate their effects on ion migration, photoelectric performance, and X-ray detection performance. Our experimental results demonstrated that the surface defects, such as the metallic Pb and Br vacancies, can be effectively passivated by both the PEAI and the two-dimensional (2D) PEA2PbI4 layers. The PEAI layer can elongate the carrier lifetime, lower the trap density, and suppress ion migration in FAPbBr3 SCs. The 2D PEA2PbI4 layer can form a dense and full surface coverage, suppress ion migration, and lower the dark current of the SCs. The X-ray sensitivity of the PEAI-passivated FAPbBr3 SC detectors is 227.93 μCGyair-1 cm-2, which is an order of magnitude higher than that of the pristine FAPbBr3 SC detectors. This work demonstrates that surface treatment plays a critical role in the crystal quality and the X-ray detection performance of SCs.
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Affiliation(s)
- Wei Jiang
- Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China
| | - Haibin Li
- Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China
| | - Zhenning Xing
- Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China
| | - Yingying Zhao
- Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China
| | - Dan Liu
- Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China
| | - Haipeng Di
- Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China
| | - Chen Zhao
- Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China
| | - Yinke Liu
- Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China
| | - Yiying Zhao
- Institute of Materials, China Academy of Engineering Physics, Jiangyou 621908, China
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Zhang Z, Pugliano TM, Cao D, Kim D, Annam RS, Popy DA, Pinky T, Yang G, Garg J, Borunda MF, Saparov B. Crystal Growth, Structural and Electronic Characterizations of Zero-Dimensional Metal Halide (TEP)InBr 4 Single Crystals for X-Ray Detection. JOURNAL OF MATERIALS CHEMISTRY. C 2023; 11:15357-15365. [PMID: 38304018 PMCID: PMC10829011 DOI: 10.1039/d3tc02787b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
Recently, metal halides have shown great potential for applications such as solar energy harvesting, light emission, and ionizing radiation detection. In this work, we report the preparation, structural, thermal, and electronic properties of a new zero-dimensional (0D) halide (TEP)InBr4 (where TEP is tetraethylphosphonium organic cation, C8H20P+). (TEP)InBr4 single crystals are obtained within a few days of continuous crystal growth time via a solution growth methodology. (TEP)InBr4 shows a relatively large optical bandgap energy of 4.32 eV and a low thermal conductivity between 0.33±0.05 and 0.45±0.07 W/m-K. Based on the density functional theory (DFT) calculations, the highest occupied molecular orbitals (HOMOs) of (TEP)InBr4 are dominated by the Br states, while the lowest unoccupied molecular orbitals (LUMOs) are constituted by both In and Br states. (TEP)InBr4 single crystals exhibit a semiconductor resistivity of 1.73×1013 Ω·cm and a mobility-lifetime (mu-tau) product of 2.07×10-5 cm2/V. Finally, a prototype (TEP)InBr4 single crystal-based X-ray detector with a detection sensitivity of 569.85 uCGy-1cm-2 (at electrical field E=100 V/mm) was fabricated, indicating the potential use of (TEP)InBr4 for radiation detection applications.
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Affiliation(s)
- Zheng Zhang
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, OK 73019
| | - Tony M. Pugliano
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, OK 73019
| | - Da Cao
- Department of Nuclear Engineering, North Carolina State University, Raleigh, NC 27607
| | - Doup Kim
- Department of Nuclear Engineering, North Carolina State University, Raleigh, NC 27607
| | - Roshan S. Annam
- School of Aerospace and Mechanical Engineering, University of Oklahoma, Norman, OK 73019
| | - Dilruba A. Popy
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, OK 73019
| | - Tamanna Pinky
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, OK 73019
| | - Ge Yang
- Department of Nuclear Engineering, North Carolina State University, Raleigh, NC 27607
| | - Jivtesh Garg
- School of Aerospace and Mechanical Engineering, University of Oklahoma, Norman, OK 73019
| | - Mario F. Borunda
- Department of Physics, Oklahoma State University, Stillwater, OK 74078
| | - Bayram Saparov
- Department of Chemistry and Biochemistry, University of Oklahoma, Norman, OK 73019
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Di H, Zeng W, Li B, Liao F, Zhao C, Liang C, Li H, Wang J, Cheng D, Ren Z, Zhao Y. Regulating 3D Phase in Quasi-2D Perovskite Films for High-Performance and Stable Photodetectors. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2302917. [PMID: 37401139 PMCID: PMC10502668 DOI: 10.1002/advs.202302917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/14/2023] [Indexed: 07/05/2023]
Abstract
The charge transport in quasi-2D perovskites limits their applications despite the superior stability and optoelectronic properties. Herein, a novel strategy is proposed to enhance the charge transport by regulating 3D perovskite phase in quasi-2D perovskite films. The carbohydrazide (CBH) as an additive is introduced into (PEA)2 MA3 Pb4 I13 precursors, which slows down the crystallization process and improves the phase ratio and crystal quality of the 3D phase. This structure change results in a significant improvement in charge transport and extraction, leading to the device demonstrating an almost 100% internal quantum efficiency, a peak responsivity of 0.41 A W-1 , and a detectivity of 1.31 × 1012 Jones at 570 nm under 0 V bias. Furthermore, the air and moisture stability of (PEA)2 MA3 Pb4 I13 films is not deteriorated but gets significantly improved due to the better crystal quality and the passivation of defects by the residual CBH molecule. This work demonstrates a strategy for improving the charge transport properties of quasi-2D perovskites and also sheds light on solving the stability issue of 3D perovskite films via the proper passivation or additives, which will inspire the fast development of the perovskite community.
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Affiliation(s)
- Haipeng Di
- Institute of MaterialsChina Academy of Engineering PhysicsJiangyou621908China
| | - Wen Zeng
- State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China
- University of Chinese Academy of Science19A Yuquan RoadBeijing100049China
| | - Bo‐Han Li
- State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China
| | - Feiyi Liao
- Institute of MaterialsChina Academy of Engineering PhysicsJiangyou621908China
| | - Chen Zhao
- Institute of MaterialsChina Academy of Engineering PhysicsJiangyou621908China
| | - Chuanhui Liang
- Institute of MaterialsChina Academy of Engineering PhysicsJiangyou621908China
| | - Huang Li
- State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China
| | - Jia‐Cheng Wang
- State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China
- University of Chinese Academy of Science19A Yuquan RoadBeijing100049China
| | - Da‐Bing Cheng
- State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China
| | - Zefeng Ren
- State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China
| | - Yiying Zhao
- Institute of MaterialsChina Academy of Engineering PhysicsJiangyou621908China
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Liu D, Di H, Ren J, Jiang W, Li H, Zhao C, Xin D, Xing Z, Zheng X, Zhao Y. X-Site Substituted 2D Cs 2 Pb(SCN) 2 Br 2 Perovskites for X-Ray Detection. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023:e2304201. [PMID: 37658508 DOI: 10.1002/smll.202304201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 08/23/2023] [Indexed: 09/03/2023]
Abstract
2D Ruddlesden-Popper (RP) perovskites have been intensively investigated due to their superior stability and outstanding optoelectrical properties. However, investigations on 2D RP perovskites are mainly focused on A-site substituted perovskites and few reports are on X-site substituted perovskites especially in X-ray detection field. Here, X-site substituted 2D RP perovskite Cs2 Pb(SCN)2 Br2 polycrystalline wafers are prepared and systematically studied for X-ray detection. The obtained wafers show a large resistivity of 2.0 × 1010 Ω cm, a high ion activation energy of 0.75 eV, a small current drift of 2.39 × 10-6 nA cm-1 s-1 V-1 , and charge carrier mobility-lifetime product under X-ray as high as 1.29 × 10-4 cm2 V-1 . These merits enable Cs2 Pb(SCN)2 Br2 wafer detectors with a sensitivity of 216.3 µC Gyair -1 cm-2 , a limit of detection of 42.4 nGyair s-1 , and good imaging ability with high spatial resolution of 1.08 lp mm-1 . In addition, Cs2 Pb(SCN)2 Br2 wafer detectors demonstrate excellent operational stability under high working field up to 2100 V cm-1 after continuous X-ray irradiation with a total dose of 45.2 Gyair . The promising features such as short octahedral spacing and weak ion migration will open up a new perspective and opportunity for SCN-based 2D perovskites in X-ray detection.
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Affiliation(s)
- Dan Liu
- Institute of Materials, China Academy of Engineering Physics, Jiangyou, 621908, China
| | - Haipeng Di
- Institute of Materials, China Academy of Engineering Physics, Jiangyou, 621908, China
| | - Jiwei Ren
- Institute of Materials, China Academy of Engineering Physics, Jiangyou, 621908, China
| | - Wei Jiang
- Institute of Materials, China Academy of Engineering Physics, Jiangyou, 621908, China
| | - Haibin Li
- Institute of Materials, China Academy of Engineering Physics, Jiangyou, 621908, China
| | - Chen Zhao
- Institute of Materials, China Academy of Engineering Physics, Jiangyou, 621908, China
| | - Deyu Xin
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900, China
| | - Zhenning Xing
- Institute of Materials, China Academy of Engineering Physics, Jiangyou, 621908, China
| | - Xiaojia Zheng
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang, 621900, China
| | - Yiying Zhao
- Institute of Materials, China Academy of Engineering Physics, Jiangyou, 621908, China
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