ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Zhi-Hong Zhang,Shan-Shan Yan,Yu-Long Chen,Zhen-Dong Lian,Ai Fu,You-Chao Kong,Lin Li,Shi-Chen Su,Kar-Wei Ng,Zhi-Peng Wei,Hong-Chao Liu,Shuang-Peng Wang
The rapid evolution of the Internet of Things has engendered increased requirements for low-cost, self-powered UV photodetectors. Herein, high-performance self-driven UV photodetectors are fabricated by designing asymmetric metal–semiconductor–metal structures on the high-quality large-area CsCu2I3 microwire arrays. The asymmetrical depletion region doubles the photocurrent and response speed compared to the symmetric structure device, leading to a high responsivity of 233 mA/W to 355 nm radiation. Notably, at 0 V bias, the asymmetric device produces an open-circuit voltage of 356 mV and drives to a short-circuit current of 372 pA; meanwhile, the switch ratio (Iph/Idark) reaches up to 103, indicating its excellent potential for detecting weak light. Furthermore, the device maintains stable responses throughout 10000 UV-light switch cycles, with negligible degradation even after 90-day storage in air. Our work establishes that CsCu2I3 is a good candidate for self-powered UV detection and thoroughly demonstrates its potential as a passive device.
研究领域:
材料科学
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光子学
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纳米技术
·
电子学
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DOI
PubMed
高影响因子
ACS Nano
·
2025
·
IF 16
Xiankan Zeng,Qiming Yin,Lunyao Pan,Yongjian Chen,Chenglong Li,Maolin Mu,Qungui Wang,Wen Li,Weiqing Yang
CsCu2I3 light-emitting diodes (LEDs) have attracted tremendous interest due to their environmental friendliness, low-cost processing, and broadband luminescence properties. However, their hole injection efficiency usually towers over electron injection efficiency owing to the intrinsic Cu vacancy-mediated excess hole concentration and wide bandgap of CsCu2I3, generating severe charge imbalance. Here, we designed an inorganic interfacial dipole layer (IDL) based on lithium chloride to exert a hole delayed-release effect for charge balance in CsCu2I3 LEDs by selectively modulating the energy levels of the contact layers. Accordingly, the IDL-based CsCu2I3 LEDs exhibit a record champion brightness of 2620 cd/m2 along with a three times enhanced peak external quantum efficiency of 3.73% at 565 nm. Meanwhile, the universality of the hole delayed-release effect of inorganic IDLs is verified by demonstrating enhanced CsCu2I3 LEDs incorporated with other alkali metal salt-based IDLs. This work provides a comprehensive guideline for optimizing the charge transport of lead-free LEDs by charge delayed-release effect of IDLs toward next-generation eco-friendly display applications.
研究领域:
材料科学
·
光电技术
·
能源与环境
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DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 28
·2002634
·
IF 16.836
Ziqing Li,Ziliang Li,Zhifeng Shi,Xiaosheng Fang
Low-dimensional metal halides at molecular level, which feature strong quantum confinement effects from intrinsic structure, are emerging as ideal candidates in optoelectronic fields. However, developing stable and nontoxic metal halides still remains a great challenge. Herein, for the first time, high-crystalline and highly stable CsCu 2 I 3 single crystal, which is acquired by a low-cost antisolvent vapor assisted method, is successfully developed to construct high-speed ( t rise / t decay = 0.19 ms/14.7 ms) and UV-to-visible broadband (300–700 nm) photodetector, outperforming most reported photodetectors based on individual all-inorganic lead-free metal halides. Intriguingly, facet-dependent photoresponse is observed for CsCu 2 I 3 single crystal, whose morphology consists of {010}, {110}, and {021} crystal planes. The on–off ratio of {010} crystal plane is higher than that of {110} crystal plane, mainly owing to lower dark current. Furthermore, photogenerated electrons are localized in twofold chains created by [CuI 4 ] tetrahedra, leading to relatively small effective mass and fast transport mobility along the 1D transport pathway. Anisotropic carrier transport characteristic is related to stronger confinement and higher electron density for {110} crystal planes. This work not only demonstrates the great potential of CsCu 2 I 3 single crystal in high-performance optoelectronics, but also gives insights into 1D electronic structure associated with fast photoresponse and high anisotropy.
研究领域:
材料科学
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光电领域
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半导体物理
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DOI
高影响因子
Materials Horizons
·
2022
·Vol. 9
·期 5
·1479-1488
·
IF 15.717
Can Zou,Qing Liu,Kai Chen,Fei Chen,Zixuan Zhao,Yunxuan Cao,Congcong Deng,Xingfu Wang,Xiaohang Li,Shaobin Zhan,Fangliang Gao,Shuti Li
Polarization-sensitive photodetectors are the core of optics applications and have been successfully demonstrated in photodetectors based on the newly-emerging metal-halide perovskites. However, achieving high polarization sensitivity is still extremely challenging. In addition, most of the previously reported photodetectors were concentrated on 1D lead-halide perovskites and 2D asymmetric intrinsic structure materials, but suffered from being external bias driven, lead-toxicity, poor stability and complex processes, severely limiting their practical applications. Here, we demonstrate a high-performance polarization-sensitive and stable polarization-sensitive UV photodetector based on a dendritic crystal lead-free metal-halide CsCu2I3/GaN heterostructure. By combining the anisotropic morphology and asymmetric intrinsic structure of CsCu2I3 dendrites with the isotropic material GaN film, a high specific surface area and built-in electric field are achieved, exhibiting an ultra-high polarization selectivity up to 28.7 and 102.8 under self-driving mode and −3 V bias, respectively. To our knowledge, such a high polarization selectivity has exceeded those of all of the reported perovskite-based devices, and is comparable to, or even superior to, those of the conventional 2D heterostructure materials. Interestingly, the unsealed device shows outstanding stability, and can be stored for over 2 months, and effectively maintained the performance even after repeated heating (373K)-cooling (300K) for different periods of time in ambient air, indicating a remarkable temperature tolerance and desired compatibility for applications under harsh conditions. Such excellent performance and simple method strongly show that the CsCu2I3/GaN heterojunction photodetector has great potential in practical applications with high polarization-sensitivity. This work provides a new insight into designing novel high-performance polarization-sensitive optoelectronic devices.
研究领域:
材料科学
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光学工程
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电子器件
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DOI
PubMed
高影响因子
ACS Photonics
·
2025
·
IF 6.7
Weidong Song,Junxing Lv,Jiaquan Li,Xiaopeng Huang,Huimin Duan,Hainan Qin,Sheng Ma,Jun Wei,Xin He,Ziqing Li
Large-grained perovskite films are critical for mitigating carrier recombination and ensuring device robustness. Here, we report a microgap thermal sublimation (MGTS) method for fabricating high-quality, large-grained CsCu2I3 films designed for air-stable UV photodetection. By engineering a submillimeter sublimation zone under low-vacuum conditions, our approach enables self-regulated deposition that yields densely packed, highly crystalline films with preferential (221) orientation on both crystalline GaN and amorphous glass substrates. Kinetic gas theory analysis suggests that our microgap configuration maintains a vapor collision probability below 40%, facilitating efficient precursor transport and uniform film growth with grain sizes exceeding 20 μm. The resulting CsCu2I3/GaN heterojunction UV photodetectors, operating in self-powered mode, achieve a responsivity of 106.34 mA/W, a detectivity of 9.24 × 1011 Jones, and rise/fall times of 4.12 μs/2.12 ms. Notably, the devices demonstrate picowatt-level detection limits and imaging capability. This work establishes MGTS as a scalable, cost-effective platform for developing air-stable, wide-bandgap copper halide perovskites for next-generation UV optoelectronics.
研究领域:
光电子学
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材料科学
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半导体器件
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薄膜技术
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光子学
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产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 27
·2300364
·
IF 13.3
Qiuchun Lu,Yufei Zhang,Guanlin Yang,Meiling Xiong,Wenqiang Wu,Zhangsheng Xu,Hui Lu,Yegang Liang,Zeping He,Yang Yu,Xiaoming Mo,Xun Han,Caofeng Pan
Cesium copper halide perovskite is one of the promising materials for solar-blind light detection. However, most of the cesium copper halide perovskite-based photodetectors (PDs) are focused on ultraviolet A detection and realized on the rigid substrate in the single device configuration. Here, a flexible solar-blind PDs array (10 × 10 pixels) based on the CsCu 2 I 3 film patterns for ultraweak light sensing and light distribution imaging is reported. Large-scale CsCu 2 I 3 film arrays are synthesized with various shapes and uniform dimensions through a simple vacuum-heating-assisted solution method. Benefiting from excellent air stability and superior resistance to the photodegrading of the CsCu 2 I 3 film, the array device exhibits long-term stable photoswitching behavior for 8 h and ultralow light detection capability to resolve the light intensity of 6.1 nW cm −2 with a high responsivity of 62 A W −1 , and the array device can acquire clear images of “G”, “X”, and “U” showing the input light distribution. Moreover, the flame detection and warning system based on a curved solar-blind PDs array is demonstrated, which can be used for multi-flame monitoring and locating. These results can encourage potential applications of the CsCu 2 I 3 film-based PDs array in the field of optical communication and environment monitoring.
研究领域:
材料科学
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光电技术
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光子学
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环境监测
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DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2021
·
IF 5.097
Xing Xu,Chao Fan,Zhuodong Qi,Sha Jiang,Qin Xiao,Huikang Liang,Huigao Duan,Qinglin Zhang
Cesium copper (I) halides, as a lead-free halide material system, have shown great potential in optoelectronic devices due to their environmental friendliness, high quantum efficiency, and extraordinary air stability. However, most of the previous reports are on quantum dots, bulk crystals, or free-standing wires. It is still challenging to realize the in-plane growth of one-dimensional (1D) cesium copper (I) halides on various substrates, which is essential for nanodevices with high integration density. Herein, we report the planar growth of CsCu2I3 nanoribbons (NBs) with high-quality single crystals on diverse substrates through a spatial-confined method. The in situ investigation of the growth process reveals that the morphology evolution of the NBs is controlled by both thermodynamics and kinetics that are dependent on the local supersaturation near the NBs. The CsCu2I3 NB-based photodetectors (PDs) exhibit an outstanding ultraviolet (UV) detection performance with a high responsivity (0.27 A/W), a specific detectivity (6.38 × 108 Jones), and a fast photoresponse speed (trise/tdecay = 5.8/6.0 ms). Furthermore, the PDs exhibit high stability to light illumination and excellent flexibility to bending. The direct in-plane growth of the lead-free CsCu2I3 NBs on various substrates would promote the practical application of copper (I) halides in electronics and optoelectronics.
研究领域:
材料科学
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光电材料
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纳米技术
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DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2026
·
IF 3.6
Yanyan Peng,Haoran Tu,Hepeng Zhao,Mingyang Li,Man Zhao
Perovskite materials have been widely developed for use in photodetectors due to their unique advantages, but most perovskites contain environmentally harmful lead. Herein, spin-coating is employed to fabricate nontoxic Cu-based perovskite films. By constructing a CsCu2I3 and ZnO heterojunction and incorporating a PEDOT:PSS hole transport layer, the ZnO/PEDOT:PSS/CsCu2I3 UV photodetector demonstrates a significantly enhanced spectral range and improved optoelectronic performance compared to a CsCu2I3 photodetector. Specifically, the photocurrent of ZnO/PEDOT:PSS/CsCu2I3 is enhanced by 3 orders of magnitude, reaching 1.43 × 10–4 A, and the responsivity is improved 57-fold to 0.67 A/W. This achievement provides an effective route for fabricating highly responsive Cu-based perovskite photodetectors.
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Lingling Zhang,Chunli Jiang,Chunhua Luo,Hechun Lin,Chang Yang,Xiaodong Tang,Yan Cheng,Hui Peng
Polarization provides a critical yet often overlooked dimension of visual information, enabling enhanced perception of scattering, object orientation, and material anisotropy. However, conventional polarization-sensitive photodetectors are limited to passive sensing and lack the capability directly encode and retain polarization information in a neuromorphic manner. Here, we report a polarization-sensitive optoelectronic synaptic device based on lead-free anisotropic CsCu 2 I 3 single crystals. Benefiting from the intrinsic one-dimensional chain-like crystal structure of CsCu 2 I 3 , the device exhibits pronounced polarization-dependent photoresponses with a high dichroic ratio of up to 2.71, together with broadband UV–Vis sensitivity. More importantly, the polarization state of incident light directly modulates the synaptic response (ΔEPSC), enabling device-level coupling between polarization-sensitive photodetection and synaptic-state modulation. The device successfully emulates essential synaptic behaviors, including pair-pulse facilitation and spike-dependent plasticity modulated by pulse width, frequency, intensity, and number. In addition, polarization-dependent image reconstruction and contrast enhancement are demonstrated based on the experimentally measured polarization-dependent synaptic responses. This work establishes anisotropic lead-free halide single crystals as a promising material platform for energy-efficient and polarization-aware neuromorphic optoelectronic devices.
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DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 20
·2201107
·
IF 10.05
Xing Xu,Sha Jiang,Chao Fan,Qi Deng,Lei Shen,Qinglin Zhang
Lead-free CsCu 2 I 3 has attracted tremendous research interests for photonics and photoelectronics due to their nontoxicity, unique electronic structure, and excellent stability. However, it is still challenging to achieve large-scale ordered arrays of CsCu 2 I 3 micro/nanowires, which limits their functional applications in integrated optoelectronic devices. Herein, unidirectional CsCu 2 I 3 wire arrays are achieved in centimeter scale through a modified microchannel-assisted spatial confinement strategy, which can confine the precursor solution into the pre-fabricated microchannel arrays in large area and control its evaporation. The microstructure characterizations reveal that the orthorhombic CsCu 2 I 3 wires are grown along the c -axis with high crystallinity. The control experiments and theoretical studies indicate that the initial CsCu 2 I 3 nucleation at the front of the solution in the channels and the stable solute supply maintained by the movement of the coverslip determine the growth of the wires. The photodetectors based on the CsCu 2 I 3 wires show a high responsivity (80 mA W −1 at 365 nm; 1.29 A W −1 at 330 nm) and fast response speed ( t rise / t decay = 640 µs/7.1 ms). Furthermore, these CsCu 2 I 3 wire arrays exhibit great potential in future flexible electronic and UV imaging applications. This work opens a new way to grow well-aligned copper-based halides nano/microwire arrays for the integrated optoelectronics applications.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
半导体物理
·
光电探测器
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Lingfeng Li,Zutao Fan,Jie Zhang,Dianyuan Fan,Xiaogang Liu,Yu Wang
Recently, low-dimensional copper(I)-based perovskite or derivatives have gained extensive attention in scintillator applications because of their environmental friendliness and good stabilities. However, the unsatisfactory scintillation performance and complex fabrication processes hindered their practical applications. Herein, efficient yellow emissive CsCu2I3 nanocrystals (NCs) were successfully prepared via a simple Mn2+-assisted hot-injection method. The added Mn2+ effectively induced the phase transformation from Cs3Cu2I5 to CsCu2I3, leading to the preparation of single-phase CsCu2I3 NCs with few defects and a high fluorescence performance. The as-prepared “optimal CsCu2I3 NCs” exhibited superior photoluminescence (PL) performance with a record-high PL quantum yield (PLQY) of 61.9%. The excellent fluorescence originated from the radiative recombination of strongly localized one-dimension (1D) self-trapped excitons (STEs), which was systematically investigated via the wavelength-dependent PL excitation, PL emission, and temperature-dependent PL spectra. These CsCu2I3 NCs also exhibited outstanding X-ray scintillation properties with a high light yield (32000 photons MeV–1) and an ultralow detection limit (80.2 nGyair s–1). Eventually, the CsCu2I3 NCs scintillator film achieved an ultrahigh (16.6 lp mm–1) spatial resolution in X-ray imaging. The CsCu2I3 NCs also exhibited good stabilities against X-ray irradiation, heat, and environmental storage, indicating their great application potential in flexible X-ray detection and imaging.
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产品关联
DOI
PubMed
高影响因子
Applied Materials Today
·
2025
·
IF 6.9
Lingling Zhang,Zhenyu Li,Juan Luo,Jinli Fu,Chunli Jiang,Chunhua Luo,Chang Yang,Xiaodong Tang,Hechun Lin,Yan Cheng,Hui Peng
Lead-free halide perovskite materials have attracted increasing attention for neuromorphic applications owing to their non-toxicity, photoresponsivity, and transport properties. Herein, a two-terminal optoelectronic synaptic device based on CsCu 2 I 3 thin films was fabricated via a single-source thermal evaporation method. The ITO/CsCu 2 I 3 /Au device exhibited the versatile synaptic behaviours under both electrical and optical stimulation, benefiting from the excellent optoelectronic properties of CsCu 2 I 3 . Under electrical stimulation, the device achieved reliable resistive switching, low energy consumption (10.8 nJ), and a digit recognition accuracy of 97.17 %. Under optical stimulation, the device demonstrated reversible learning-forgetting-relearning behaviour, and frequency-dependent responses that enable high-pass filter for image sharpening. Notably, a classical Pavlovian conditioning process was successfully mimicked owing to its multi-wavelength photoresponsivity. This work provides a scalable and eco-friendly platform for multifunctional neuromorphic computing, in-sensor processing, and artificial perception systems.
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高影响因子
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