1
|
Li Y, Chen H, Hao Z, Wang Z, Wu X, Lu X, Li X, Zhang J. Toward Low-Voltage and High-Sensitivity Direct X-ray Detectors Based on Thick Bulk Heterojunction Organic Device. ACS Appl Mater Interfaces 2024; 16:10417-10426. [PMID: 38375798 DOI: 10.1021/acsami.3c18529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
Organic semiconducting materials are promising for the fabrication of flexible ionizing radiation detectors for imaging because of their tissue equivalence, simple large-scale processing, and mass production. However, it is challenging to achieve high-sensitivity detection for organic direct detectors prepared by low-cost solution processing because of the compromise between thickness and carrier transport. In this study, high-performance organic direct X-ray detectors were fabricated by building a micrometer-thick bulk heterojunction (BHJ) using poly(3-hexylthiophene-2,5-diyl) (P3HT):(6,6)-phenyl c71 butyric acid methyl ester. A 5 μm BHJ film was fabricated by drop-casting and enhanced crystallization of P3HT using binary solvents and high-boiling-point additives to improve the charge carrier mobility. Furthermore, this organic direct X-ray detector has a sensitivity of >654.26 μC Gyair s-1 and a self-powered response. Because of the architecture of the thick active layer and the energy cascade in this diode detector, it has a very low dark current of 46.26 pA at -2 V. A fast and efficient approach was developed for fabricating thick, highly mobile organic BHJ films for high-performance direct X-ray detectors. It has great potential for application in a new generation of flexible and portable large-area flat-panel detectors.
Collapse
Affiliation(s)
- Yi Li
- School of Microelectronics, Shanghai University, Shanghai 200444, China
| | - Hu Chen
- Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, Shanghai 200072, China
| | - Zhao Hao
- School of Microelectronics, Shanghai University, Shanghai 200444, China
| | - Zixuan Wang
- Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, Shanghai 200072, China
| | - Xingyang Wu
- Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, Shanghai 200072, China
| | - Xiuzhen Lu
- School of Microelectronics, Shanghai University, Shanghai 200444, China
| | - Xifeng Li
- Key Laboratory of Advanced Display and System Applications, Ministry of Education, Shanghai University, Shanghai 200072, China
| | - Jianhua Zhang
- School of Microelectronics, Shanghai University, Shanghai 200444, China
| |
Collapse
|
2
|
Jin P, Tang Y, Xu X, Ran P, Wang Y, Tian Y, Huang Y, Zhu B, Yang YM. Solution-Processed Perovskite/Metal-Oxide Hybrid X-Ray Detector and Array with Decoupled Electronic and Ionic Transport Pathways. Small Methods 2022; 6:e2200500. [PMID: 35754169 DOI: 10.1002/smtd.202200500] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 05/26/2022] [Indexed: 06/15/2023]
Abstract
Lead halide perovskites possess heavy elements and excellent mobility-lifetime (µτ) product, becoming desirable candidates for X-ray detectors. However, current perovskite photoconduction detectors (PCDs) with vertical geometry, where electronic signals and mobile ions share the same conduction path, are facing with extremely challenging ion-migration issue. Herein, a hybrid X-ray detector device structure, in which perovskite is vertically stacked onto an indium oxide (In2 O3 ) transistor with lateral transport geometry is designed, perovskite mainly acts as X-ray sensitizer to activate In2 O3 conduction channel, the actual electrical signal is conducted and collected in the lateral metal-oxide device. With the decoupled ionic and electronic transportation, hybrid detectors are insensitive to the ionic motion of perovskite, hence demonstrating no hysteresis and almost no shifting of baseline that are often observed in PCDs, hybrid detectors also exhibit reduced dark current, improved response time, and four times higher photocurrent signals. Finally, array integration of hybrid detectors and preliminary X-ray imaging is realized. The work provides an effective device strategy in addition to the mere material alternations to attain high-performance perovskite-based X-ray detectors and arrays.
Collapse
Affiliation(s)
- Peng Jin
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310007, China
| | - Yingjie Tang
- Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, Zhejiang, 310024, China
- Zhejiang University, Hangzhou, Zhejiang, 310007, China
| | - Xuehui Xu
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310007, China
| | - Peng Ran
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310007, China
| | - Yan Wang
- Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, Zhejiang, 310024, China
- Zhejiang University, Hangzhou, Zhejiang, 310007, China
| | - Yue Tian
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310007, China
| | - Yong Huang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310007, China
- Science and Technology Industrial Park, Xidian Wuhu Research Institute, Wuhu, 241002, China
| | - Bowen Zhu
- Key Laboratory of 3D Micro/Nano Fabrication and Characterization of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, Zhejiang, 310024, China
| | - Yang Michael Yang
- State Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering, Zhejiang University, Hangzhou, Zhejiang, 310007, China
| |
Collapse
|
3
|
Xu X, Qian W, Wang J, Yang J, Chen J, Xiao S, Ge Y, Yang S. Sequential Growth of 2D/3D Double-Layer Perovskite Films with Superior X-Ray Detection Performance. Adv Sci (Weinh) 2021; 8:e2102730. [PMID: 34495577 PMCID: PMC8564448 DOI: 10.1002/advs.202102730] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Indexed: 05/30/2023]
Abstract
Perovskite materials in different dimensions show great potential in direct X-ray detection, but each with limitations stemming from its own intrinsic properties. Particularly, the sensitivity of two-dimensional (2D) perovskites is limited by poor carrier transport while ion migration in three-dimensional (3D) perovskites causes the baseline drifting problem. To circumvent these limitations, herein a double-layer perovskite film is developed with properly aligned energy level, where 2D (PEA)2 MA3 Pb4 I13 (PEA=2-phenylethylammonium, MA=methylammonium) is cascaded with vertically crystallized 3D MAPbI3 . In this new design paradigm, the 3D layer ensures fast carrier transport while the 2D layer mitigates ion migration, thus offering a high sensitivity and a greatly stabilized baseline. Besides, the 2D layer increases the film resistivity and enlarges the energy barrier for hole injection without compromising carrier extraction. Consequently, the double-layer perovskite detector delivers a high sensitivity (1.95 × 104 μC Gyair -1 cm-2 ) and a low detection limit (480 nGyair s-1 ). Also demonstrated is the X-ray imaging capacity using a circuit board as the object. This work opens up a new avenue for enhancing X-ray detection performance via cascade assembly of various perovskites with complementary properties.
Collapse
Affiliation(s)
- Xiuwen Xu
- Guangdong Key Lab of Nano‐Micro Material ResearchSchool of Chemical Biology and BiotechnologyShenzhen Graduate SchoolPeking UniversityShenzhen518055China
| | - Wei Qian
- Guangdong Key Lab of Nano‐Micro Material ResearchSchool of Chemical Biology and BiotechnologyShenzhen Graduate SchoolPeking UniversityShenzhen518055China
| | - Jian Wang
- Guangdong Key Lab of Nano‐Micro Material ResearchSchool of Chemical Biology and BiotechnologyShenzhen Graduate SchoolPeking UniversityShenzhen518055China
- Institute of Biomedical EngineeringShenzhen Bay LaboratoryShenzhen518055China
| | - Jiecheng Yang
- Research Center for Medical Artificial IntelligenceShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China
- Paul C. Lauterbur Research Center for Biomedical ImagingShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China
| | - Jianwei Chen
- Research Center for Medical Artificial IntelligenceShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China
- Paul C. Lauterbur Research Center for Biomedical ImagingShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China
| | - Shuang Xiao
- Guangdong Key Lab of Nano‐Micro Material ResearchSchool of Chemical Biology and BiotechnologyShenzhen Graduate SchoolPeking UniversityShenzhen518055China
| | - Yongshuai Ge
- Research Center for Medical Artificial IntelligenceShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China
- Paul C. Lauterbur Research Center for Biomedical ImagingShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen518055China
| | - Shihe Yang
- Guangdong Key Lab of Nano‐Micro Material ResearchSchool of Chemical Biology and BiotechnologyShenzhen Graduate SchoolPeking UniversityShenzhen518055China
- Institute of Biomedical EngineeringShenzhen Bay LaboratoryShenzhen518055China
| |
Collapse
|