Article
Chemistry, Multidisciplinary
Zhizhen Chang, Zhengjun Lu, Wei Deng, Yandi Shi, Yuye Sun, Xiujuan Zhang, Jiansheng Jie
Summary: Narrow-bandgap Sn-Pb mixed perovskite single crystals show great potential as photoactive materials for efficient and low-cost near-infrared (NIR) photodetectors. However, the phase separation issue during crystallization process leads to the degradation of optical and electronic properties. In this study, a low-temperature space-confined technique (LT-SCT) is proposed to reduce the crystallization velocities and create pure-phase (FASnI(3))(0.1)(MAPbI(3))(0.9) single crystals. These crystals exhibit excellent crystallinity, high hole mobility, and low surface trap density, enabling their application in self-powered NIR photodetectors with outstanding performance. The work contributes to the development of Sn-Pb mixed perovskite single crystals and offers a promising candidate for efficient and low-cost NIR photodetection.
Article
Materials Science, Multidisciplinary
Enliu Hong, Ziqing Li, Fa Cao, Xiaolei Deng, Xinyu Zhang, Xiaosheng Fang
Summary: Non-layered all-inorganic perovskite single crystals (AIPSCs) with ultralow trap density and exceptional optoelectronic properties have been synthesized using a universal liquid-air interfacial assembly strategy, enabling the development of high-performance perovskite optoelectronic devices. Photodetectors based on these AIPSCs show excellent performance, with CsPbBr3 PDs achieving responsivity up to 120 A W-1 and detectivity exceeding 2 x 10(13) Jones. The fabrication of vertically integrated heterojunctions of mixed-dimensions further enhances the self-powered characteristics of 2D/3D heterostructure PDs.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Rudai Zhao, Ting Zhang, Shiheng Wang, Lutong Guo, Zhenkun Gu, Yiqiang Zhang, Yanlin Song
Summary: Intercalation regulation using hydrogen bonds to insert dimethyl sulfoxide into a synthesized perovskite allows for tuning its photophysical properties without changing the organic cations. The new intercalated perovskite can be stored for over two months without encapsulation at room temperature and 60% relative humidity. The potential to regulate optoelectronic properties of perovskites by reversibly binding intercalated molecules with perovskites is demonstrated.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Tehinke Achille Malo, Zhengjun Lu, Wei Deng, Yuye Sun, Chaoqiang Wang, Azhar Ali Ayaz Pirzado, Jiansheng Jie, Xiujuan Zhang, Xiaohong Zhang
Summary: An effective and universal strategy is reported for large-scale patterned growth of high-quality perovskite single-crystal microplates. By modulating the wettability of gold nanoparticles, random and multiple nucleation are suppressed, leading to the formation of uniform perovskite microplates with exceptional properties.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xiaojun Su, Xuehua Hou, Qinglei Zhang, Zengqi Xie, Zhipeng Wei, Linlin Liu
Summary: A fast photomultiplier photodetector with a broad/narrowband dual mode is achieved using a new 3D heterostructure based on embedded perovskite micro-sized single crystals. By dividing the active layer into a perovskite microcrystalline part for charge transport and a polymer-embedded part for charge storage, an additional radial interface is formed, resulting in a photogenerated built-in electric field in the radial direction. This heterojunction exhibits high external quantum efficiency (EQE) and microsecond response in a wide range of ultraviolet to visible light and a narrow-band response with a small full width at half minimum (FWHM) of 20 nm, showing great potential for integrated multifunctional photodetectors.
ADVANCED MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Hye Ri Jung, Yunae Cho, William Jo
Summary: Understanding the mechanism of photogenerated charge transport in perovskite-based devices is crucial for their improvement. In this study, low-defect perovskite single crystals were used to fabricate photodetectors with different electrodes and interlayers. The transport mechanism of photogenerated carriers was analyzed under different illuminations. The results showed improved photocurrent in devices with hole-dominant and electron-dominant crystals under specific illuminations. The study suggests a promising strategy for designing efficient photodetectors using trap-assisted photocarriers.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Physics, Applied
Hye Ri Jung, Maryam Bari, Yunae Cho, Yeon Soo Kim, Trang Thi Thu Nguyen, Yejin Kim, Seokhyun Yoon, Young Chan Jo, Jae Hoon Kim, Shavkat Yuldashev, Zuo-Guang Ye, William Jo
Summary: This study investigates the excitonic behaviors of CH3NH3PbCl3 perovskite single crystal, revealing the free and bound excitonic transitions through temperature- and power density-dependent photoluminescence and optical transmission spectra. Different structural phases of the perovskite show distinct excitonic behaviors, contributing to the understanding of optoelectronic properties and potential applications in photonic devices. Excitonic phenomena in perovskite materials offer a fundamental approach for the development of optoelectronic applications.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Ting Xiao, Jie Zhao, Peng Sun, Peng Li, Yaokang Zhang, Ni Zhao, Zhiwei Ren, Gang Li, Zhifeng Huang, Zijian Zheng
Summary: The study introduces a new type of broadband-transmitting built-in TiO2 metalens that can enhance the sensitivity, speed, and efficiency of photodetectors.
Article
Materials Science, Multidisciplinary
Yazhou Yang, Xiangquan Liu, Taoran Liu, Dan Chen, Zhenglan Ye, Jiayi Li, Qinxing Huang, Yupeng Zhu, Yaqing Pang, Diandian Zhang, Zhi Liu, Buwen Cheng, Jun Zheng, Yuhua Zuo
Summary: In this study, the widest detection range from 254 nm to 1800 nm was achieved by integrating CsPb(BrCl)(3): Yb3+ nanocrystals with Germanium on a Si substrate. A down conversion technology was proposed to convert UV light to 980 nm infrared light, overcoming the response speed limitation of the UV region. The hybrid photodetector showed a significant improvement in response time at 275 nm and enhanced responsivity in the entire detection band, especially at 1310 nm.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Physical
Shuo Liu, Shujie Jiao, Hongliang Lu, Yiyin Nie, Shiyong Gao, Dongbo Wang, Jinzhong Wang, Liancheng Zhao
Summary: A sensitive, high-detectivity and self-powered UVA detector based on polycrystalline CH3NH3PbCl3/amorphous Ga2O3 hybrid structure is presented in this work, showing superior performance compared to most reported devices based on CH3NH3PbCl3 single crystal. The heterojunction between amorphous Ga2O3 and CH3NH3PbCl3 accelerates carrier separation and reduces recombination, while the high resistivity and low surface roughness of Ga2O3 contribute to device parameter improvement.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Jinshuai Zhang, Jiajia Zhao, Yongfeng Zhou, Yufei Wang, Karen Silva Blankenagel, Xuechun Wang, Madeeha Tabassum, Lei Su
Summary: Hybrid organic-inorganic perovskite single crystals show promise in high-performance optoelectronic devices due to their lack of grain boundaries and fewer defects. Research has found that surface nanopatterns on these crystals can lead to high polarization photodetection sensitivity under specific light conditions, which may have potential applications in future optoelectronic devices.
ADVANCED OPTICAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Xiangyu Xu, Yuxuan Fu, Li Zhang, Chao Li, Han Gao, Yan Kuai, Zhijia Hu, Zhigang Cao, Siqi Li
Summary: This paper successfully synthesized high-quality Cs4PbBr6 single crystals and found that they possess excellent performance in visible light communication, including high-speed and wide-angle data transmission.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Review
Materials Science, Multidisciplinary
Wenchao Xu, Wenjun Huang, Xiujia Wu, Xiangfeng Wei, Fancheng Meng, Jiehua Liu
Summary: Regarding the research on 2D perovskite single crystals, this paper systematically reviews crystal growth methods and their properties, as well as the potential in applications for single-crystal photodetectors.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Chwen-Haw Liao, Chiung-Han Chen, Jueming Bing, Christopher Bailey, Yi-Ting Lin, Twishi Mukul Pandit, Laura Granados, Jianghui Zheng, Shi Tang, Bi-Hsuan Lin, Hung-Wei Yen, Dane R. McCamey, Brendan J. Kennedy, Chu-Chen Chueh, Anita W. Y. Ho-Baillie
Summary: The first inorganic-cation pseudohalide 2D phase perovskite single crystal Cs2Pb(SCN)(2)Br-2 is reported in this study, synthesized by the antisolvent vapor-assisted crystallization method at room temperature. This 2D single crystal exhibits a low exciton binding energy and demonstrates respectable responsivity and detectivity at low bias voltage.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Jun Liu, Dongwei Hei, Qiang Xu, Xinjian Tan, Jinlu Ruan, Xiaoping Ouyang, Jing Nie, Kun Wei, Qing Xu, Bin Sun
Summary: The radioluminescence characteristics of a single-crystalline hybrid lead halide perovskite were investigated, showing several times enhancement of scintillation performance at low temperatures. This indicates that these materials can serve as stable scintillating materials for pulsed gamma detectors, providing a pathway for perovskite application and attracting attention to investigating low-temperature scintillators.
Article
Physics, Applied
Qichao Hou, Kewei Liu, Dongyang Han, Yongxue Zhu, Xing Chen, Binghui Li, Lei Liu, Dezhen Shen
Summary: Epitaxial MgGa2O4 thin films were grown on a sapphire substrate by using metal organic chemical vapor deposition. The films showed high crystalline quality and low oxygen vacancy concentration after oxygen annealing. The oxygen-annealed MgGa2O4 photodetector exhibited excellent solar-blind ultraviolet photodetection characteristics, including quick response speed, low dark current, and high UV/Visible rejection ratio. The study also investigated the effects of annealing atmosphere on the film's photoelectric properties.
APPLIED PHYSICS LETTERS
(2022)
Article
Optics
Yuzhou Sun, Mingming Jiang, Binghui Li, Xiuhua Xie, Chongxin Shan, Dezhen Shen
Summary: In this work, individual ZnO microbelts doped with Ga (ZnO:Ga) were studied for their applicability in lateral microresonator Fabry-Perot (FP) microlasers. Introducing Ag nanoparticles (AgNPs) on the microbelts improved the FP lasing characteristics, including lower threshold and enhanced output. Notably, large AgNPs showed a redshift and broadening of lasing peaks with increasing excitation fluence. The stimulated radiation in an AgNPs@ZnO:Ga microbelt was attributed to the Mott transition from excitonic state to electron-hole plasma (EHP) state. This study provides insights into the transition between excitonic and EHP states and offers a new approach for developing high-efficiency and ultra-low threshold microlasing diodes.
Article
Optics
Yanshuang Li, Xiuhua Xie, Huan Zeng, Binghui Li, Zhenzhong Zhang, Shuangpeng Wang, Jishan Liu, Dezhen Shen
Summary: The observation of deeply trapped excitons in twist-stacked hexagonal boron nitride (hBN) motivates further studies of bosonic strongly correlation physics based on this material.
Review
Engineering, Electrical & Electronic
Jialin Yang, Kewei Liu, Xing Chen, Dezhen Shen
Summary: This review presents recent research on Ultrawidebandgap (UWBG) semiconductors in optoelectronics and microelectronics, and discusses the challenges and opportunities faced by these semiconductors.
PROGRESS IN QUANTUM ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Zhiyao Zheng, Baoshi Qiao, Zhenzhong Zhang, Xiaoqian Huang, Xiuhua Xie, Binghui Li, Xing Chen, Kewei Liu, Lei Liu, Dezhen Shen
Summary: Detectivity, the key parameter in weak-signal photodetection, depends on high photoresponse and low noise simultaneously. In this study, metal-semiconductor-metal solar-blind UV detectors with internal gain were created using high resistant and a certain oxygen vacancy density Ga2O3 thin films. Electrical measurements and electric field simulation demonstrated the importance of thickening the active layer for high responsivity. The gain was determined by the tunneling effect in high electric field under the electrodes. A high photoresponse of 371 A/W and a normalized detectivity up to 6.6 x 10(16) Jones were achieved.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2022)
Article
Materials Science, Multidisciplinary
Qichao Hou, Kewei Liu, Xing Chen, Jialin Yang, Qiu Ai, Zhen Cheng, Yongxue Zhu, Binghui Li, Lei Liu, Dezhen Shen
Summary: Mg x Ga2O4 epitaxial films with different Mg component ratios were prepared, and their structure, composition, crystalline quality, and optical properties were investigated. The results indicate that the crystalline quality and photoelectric response characteristics of Mg x Ga2O4 films depend on the Mg content.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Peixuan Zhang, Kewei Liu, Yongxue Zhu, Qiu Ai, Jialin Yang, Xing Chen, Zhen Cheng, Binghui Li, Lei Liu, Dezhen Shen
Summary: A metal-semiconductor-metal (MSM) vacuum ultraviolet (VUV) photodetector is realized on polycrystalline AlN film grown by molecular beam epitaxy. The device exhibits low dark current, high rejection ratio, and ultra-fast response speed, while maintaining stability and repeatability at high temperatures. This research is significant for the design and preparation of AlN-based VUV photodetectors.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Yanshuang Li, Huan Zeng, Xiuhua Xie, Binghui Li, Jishan Liu, Shuangpeng Wang, Dengyang Guo, Yuanzheng Li, Weizhen Liu, Dezhen Shen
Summary: We observe the phonon splitting of soliton networks in reconstructed moire superlattices of bilayer MoS2 nanostructures, and find a distinct hysteresis behavior by tuning a perpendicular displacement field. Additionally, we demonstrate a proof-of-principle moire ferroelectric tunneling junction. Our findings provide a potential pathway for future moire-based nanodevices.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Physical
Chao Zhang, Kewei Liu, Qiu Ai, Xiaoqian Huang, Xing Chen, Yongxue Zhu, Jialin Yang, Zhen Cheng, Binghui Li, Lei Liu, Dezhen Shen
Summary: In this study, high-performance solar-blind ultraviolet photodetection in thin films was achieved by combining high-temperature oxygen annealing and oxygen plasma treatment. The improved performance was attributed to the reduction of defects and modification of surface states in the films.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Wushuang Han, Kewei Liu, Jialin Yang, Xing Chen, Qiu Ai, Yongxue Zhu, Zhen Cheng, Binghui Li, Lei Liu, Dezhen Shen
Summary: This study demonstrates a high-performance self-powered UV-visible photodetector enhanced by the ferroelectric effect on amorphous BaTiO3/p-Si heterojunction. The device achieves significantly improved responsivities of 14 mA/W, 27 mA/W, and 223 mA/W at 254 nm, 365 nm, and 600 nm, respectively, outperforming other BaTiO3-based self-driven photodetectors reported. The device also exhibits a fast response speed with rising/fall times of 450 μs/460 μs at 254 nm and 80 μs/140 μs at 600 nm. The defect-assisted recombination of photogenerated carriers at the amorphous BaTiO3/p-Si interface and grain boundaries enables the visualization of transient photocurrent spikes under 254 nm illumination. This work presents a novel strategy for the design and research of high-performance self-powered photodetectors.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Yongxue Zhu, Kewei Liu, Xiaoqian Huang, Peixuan Zhang, Qiu Ai, Zhen Cheng, Jialin Yang, Xing Chen, Binghui Li, Lei Liu, Dezhen Shen
Summary: In this work, a self-driven p-GaN/i-ZnGa2O4/n-ITO heterojunction broadband ultraviolet (BUV) photodetector with high working temperature was demonstrated. The device exhibits excellent and stable BUV photodetection performance in the temperature range of 25-300 degrees C, with a peak responsivity of similar to 132 mA/W, a broad UV response band ranging from 250 to 400 nm, a high UV-to-visible rejection ratio of nearly 104, and a high -3 dB cutoff frequency of 20 kHz even at 300 degrees C.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Physics, Multidisciplinary
Zhen Cheng, Kewei Liu, Baoshi Qiao, Jialin Yang, Xing Chen, Qiu Ai, Yongxue Zhu, Binghui Li, Lei Liu, Dezhen Shen
Summary: Heterojunctions consisting of hybrid organic-inorganic lead halide perovskites and other semiconductors have attracted attention for their potential application in photodetectors. However, their performance is limited by the low crystalline quality of perovskites and the difficulty in adjusting response spectra. This study successfully fabricated high quality CH3NH3PbCl3 micro-sized crystals on one side of individual ZnO microwires to form a heterojunction photodetector, which showed low dark current and rapid response speed. The modulation of response spectra and responsivity can be achieved by front or back illumination due to self-filtering properties, providing a promising method for high-performance heterojunction photodetectors.
Article
Engineering, Electrical & Electronic
Peixuan Zhang, Kewei Liu, Yongxue Zhu, Qiu Ai, Zhen Cheng, Jialin Yang, Xing Chen, Binghui Li, Lei Liu, Dezhen Shen
Summary: An AlN thin-film vacuum ultraviolet (VUV) photodetector was prepared on a c-Al2O3 substrate using molecular beam epitaxy (MBE) device without a buffer layer. The device exhibited ultralow dark current, high rejection ratio, high responsivity, and fast response time at room temperature. Interestingly, the device showed excellent temperature tolerance and maintained its performance at high temperatures. These results demonstrate the high-performance and high-temperature detection ability of the AlN VUV photodetector without the need for a buffer layer.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Chemistry, Multidisciplinary
Yanshuang Li, Xiuhua Xie, Binghui Li, Xiaoli Sun, Yichen Yang, Jishan Liu, Jiying Feng, Ying Zhou, Yuanzheng Li, Weizhen Liu, Shuangpeng Wang, Wei Wang, Huan Zeng, Zhenzhong Zhang, Dawei Shen, Dezhen Shen
Summary: Two-dimensional van der Waals crystals allow for novel combinations of physical properties by controlling the stacking order or twist angle of individual layers. However, the current exfoliation methods lack sufficient information on lattice orientation, hindering the systematic study of multilayer assemblies. This paper presents a distinguishable exfoliation method based on gold favor epitaxy, which enables the precise control of lattice orientation while achieving high-quality and large-size monolayers. This approach has the potential to facilitate the development of ordered stacking in multilayer structures.
