ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Lili Gao,Pei Fang,Ye Yang,Ping Hu,Siyan Yang,Jiale Zhu,Fan Yang,Hua Wang,Kui Zhao
Because of their excellent stability and photoelectric properties, perovskite single crystals have been widely applied in fields such as detection and photovoltaics. This study demonstrated a ligand-assisted gas pump method for perovskite crystallization, in which the influence of the pressure change rate on the morphology of perovskite crystals and the quality of ligand-assisted crystallization were investigated. CH3NH3PbBr3 single crystals were obtained via the gas pump method assisted with 3-(decyldimethylazaniumyl)propanesulfonate (DPSI) as the ligand for crystallization. With varying rates of environmental pressure variation, the (100) crystal surface exhibited a step-like growth process, and the steps were “center-initiated, outward-expanding”. When the pressure changes rapidly, the steps are wide and steep; as the pressure change rate gradually slows, the slope of the steps becomes gentler. When the growth rate reached 20 Pa/h, the crystal surface became flat, and the growth steps disappeared. The rate of pressure change enables control of the crystal step morphology. To further control crystal growth and quality, the DPSI ligand was employed during the crystal growth process under low-pressure conditions. The −SO3– group in DPSI anchors uncoordinated Pb2+, effectively suppressing solution nucleation. This interaction significantly enhances crystal quality, increases crystal stability, and effectively expands the size of MAPbBr3 crystals. The optimized MAPbBr3 detector achieved an outstanding X-ray sensitivity of up to 10798 μC Gyair–1 cm–2 at a bias of 50 V, along with a minimum detectable dose rate of 0.19 μGyair s–1 for 40 kVp X-rays. These advancements have contributed to reducing radiation exposure for patients during medical X-ray diagnostics. The methodology employed in this study enables the fabrication of high-quality crystals through controlled growth rate modulation, demonstrating significant potential for detector applications.
研究领域:
材料科学
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光电子学
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晶体生长
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辐射探测
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钙钛矿半导体
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产品关联
DOI
PubMed
高影响因子
Advanced Optical Materials
·
2018
·Vol. 6
·期 20
·1800411
·
IF 7.43
Jun Xing,Xin Zheng,Zhi Yu,Yuhao Lei,Lei Hou,Yuting Zou,Chen Zhao,Bin Wang,Haotian Yu,Dexin Pan,Yuechen Zhai,Jinluo Cheng,Ding Zhou,Songnan Qu,Jianjun Yang,Rashid A. Ganeev,Weili Yu,Chunlei Guo
Single crystal perovskites are used in solar cells, photodetectors, and other devices due to their excellent light absorption and carrier transport characteristics. However, for light-emitting applications, photoluminescence (PL) is usually weak for MAPbBr 3 (MA = CH 3 NH 3 + ) single crystals (MBSCs) compared with their polycrystalline counterpart. Therefore, developing novel techniques to process MBSCs with different morphologies for PL-related applications is greatly needed. The current strategies for making perovskite crystals are mostly based on bottom-up method (chemical synthesis and assembling). Here, an easy method to achieve top-down fabrication of MBSCs, i.e., femtosecond laser processing MBSC surface by controlling the laser parameters is demonstrated. The femtosecond laser processing technology can achieve two orders of magnitude enhancement under ambient conditions in PL. In addition, the processed regions also show three times enhancement in PL under nitrogen environment. It is assumed that this is mainly due to the texture based on photon recycling and light out-coupling mechanism, and the passivation of surface recombination centers on MBSC. This study not only provides a convenient top-down strategy to achieve a range of morphological micro-/nanostructures with enhanced PL on MBSC surface, but also paves the way for applications of MBSCs in light emitting or PL imaging devices.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
Advanced Optical Materials
·
2024
·Vol. 12
·期 24
·2400707
·
IF 8
Ningfang He,Longzhen Zhang,Xin He,Jiahao Guo,Xiaochao Wu,Qingkui Li,Jilin He
Heterojunctions combining 2D and 3D perovskites have caused a surge in the research on X-ray detectors. The enhanced charge transport facilitated by the built-in electric field further amplifies the potential of this material system, paving the way for highly sensitive and efficient X-ray detectors. In this study, PA 2 PbBr 4 single-crystal film with a thickness of 10 µm is successfully grown on the surface of MAPbBr 3 substrate via liquid phase epitaxial method, forming a 2D/3D heterojunction. This innovative detector exhibits a dramatically enhanced sensitivity of 3.81 × 10 4 µC Gy −1 cm −2 at an X-ray tube voltage of 70 keV and a bias of 50 V mm −1 , along with an ultra-low detection limit of 11.84 nGy s −1 , surpassing the performance of the conventional MAPbBr 3 X-ray detectors by a factor of four and 2 × 10 3 times higher than that of commercialized α -Se detectors. Furthermore, the 2D/3D heterojunction exhibits exceptional self-powered X-ray detection capabilities, achieving a remarkable sensitivity of 3562.26 µC Gy −1 cm −2 at 70 keV X-ray tube voltage. This superior performance implies reduced energy consumption, high portability, decreased ion migration, and provides inspiration for the next generation of high-performance X-ray detectors.
研究领域:
材料科学
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光电子学
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辐射探测
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半导体器件
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钙钛矿电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Kai Cui,Yang Li,Wenjing Wei,Qianqian Teng,Tianyu Zhang,Guangyao Hou,Hongjun Kang,Wei Qin,Xiaohong Wu
As deep space exploration is getting further and further away, it is necessary to develop novel packaging shielding material with lightweight and high performance to improve the service life of spacecraft integrated circuits in space radiation environment. However, up to now, constructing a lightweight perovskite/epoxy composite packaging shielding material for spacecraft integrated circuits has not been reported. Hence, in this work, a novel MAPbBr 3 /epoxy (CH 3 NH 3 PbBr 3 /EP) composite is firstly reported, which shows excellent gamma-rays shielding performance with high linear attenuation coefficient (3.082 cm −1 ) and high mass attenuation coefficient (2.047 cm 2 /g). Radiation shielding mechanism indicates that gamma-rays mainly interact with MAPbBr 3 dispersed in epoxy. In other words, MAPbBr 3 forms a radiation blocking path in epoxy, which significantly attenuates the intensity of incident gamma-rays. In addition, MA + in MAPbBr 3 crystal structure effectively blocks the penetrating behavior of secondary electrons. This work provides a novel strategy for the design and synthesis of high-performance radiation shielding packaging materials.
研究领域:
材料科学
·
空间辐射防护
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2026
·
IF 3.4
Ting Zhao,Lin Ma,Haoyang Guan,Chaofan Guo,Qian Zhang,Yuhang Huang,Weiran Chen,Taifeng Lin,Jiawen Xiao,Zheng-Guang Yan
Rare-earth (RE) doping has proven to be effective in enhancing the luminescent and optoelectronic properties of halide perovskites (HPs). However, the growth of RE-doped halide perovskite single crystals remains challenging. Herein, we successfully synthesized nine distinct MAPbBr3:RE (RE = Yb, Eu, Tb) single crystals (6–8 mm in size, RE/Pb = 0.008–0.053%) through systematic optimization of RE reagents, growth temperature, and solution concentration. Structural and optical characterization revealed RE-induced lattice expansion and band gap modulation, confirming the effective incorporation into the perovskite lattice. Furthermore, RE doping significantly improved the charge transport properties of MAPbBr3 single crystals. After doping Yb into MAPbBr3 (Yb/Pb = 0.013%), the trap density decreased from 9.2 × 109 to 2.5 × 109/cm3, carrier mobility increased from 59 to 799 cm2/(V s), and carrier lifetime increased from 199 to 2766 ns. These enhancements translated to exceptional γ-ray detection performance, with the energy resolution (ER) value for 241Am (59.5 keV) improved from 11.0% (for pristine MAPbBr3) to 6.3% (MAPbBr3:Yb) under a 5 V bias. This work not only establishes RE doping as a powerful strategy for optimizing the properties of halide perovskite semiconductors but also opens new avenues for the development of advanced radiation sensing materials.
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DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Yu Li,Anqi Sun,Yufan Yang,Zhouping Wang,Junsong Yang
As emerging luminescent materials, perovskite quantum dots (PQDs) have attracted considerable attention due to their exceptional fluorescence properties. However, their practical application is hindered by inherent instability and high toxicity. In this study, we developed a “turn-on” fluorescent aptasensor for azlocillin detection by integrating aptamer A58-modified ZIF-8-encapsulated MAPbBr 3 (ZIF-8@MAPbBr 3 @A58) with complementary DNA-functionalized magnetic beads (MBs@cDNA). We first rationally designed a 2-aminobenzimidazole and Mn 2+ co-doped ZIF-8@MAPbBr 3 composite, exhibiting enhanced stability, strong luminescence, low biotoxicity and facile modification. The ZIF-8@MAPbBr 3 was further functionalized with A58 to serve as a highly specific signal probe (ZIF-8@MAPbBr 3 @A58), while MBs@cDNA acted as a magnetic separation probe. In the present of azlocillin, the ZIF-8@MAPbBr 3 @A58 probe displayed high affinity toward the targe, leading to the dissociation of the ZIF-8@MAPbBr 3 @A58-MBs@cDNA complex and resulting in enhanced fluorescence intensity. Subsequently, the complementary region between aptamer and cDNA was optimized guided by the molecular docking. Under optimal conditions, the proposed aptasensor achieved a limit of detection of 0.014 ng/mL, with a linear range of 0.1-100 ng/mL. This work demonstrates that ZIF-8 encapsulation combined with ion doping effectively addresses PQD instability. And the strategy paves the way for developing stable PQD-based aptasensors for trace antibiotic monitoring.
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DOI
PubMed
高影响因子
Advanced Optical Materials
·
2024
·Vol. 12
·期 15
·2302918
·
IF 8
Abida Perveen,Yubing Xu,Syed Muhammad Abubakar,Premkumar Sellan,Wang Xin,Fawad Saeed,Sajid Hussain,Byung Seong Bae,Jianming Zhou,Ying Zhu,Wei Lei
The perovskite single crystals (PSC) produced by solution-processed metallic ions doping have a thick p–n junction (greater than 10 µm). Meanwhile, to achieve high responsivity, the carrier drift length (µτE) has to be larger than the dimensions of the detector. If the p–n junction is quite thick, a high bias voltage is required. For the practical application of photodiode, it is imperative to find a means to generate a thin p–n junction. A productive technique is suggested for forming a thin p–n junction by diffusing metallic ions, resulting in a longer drift length of the carrier than the depletion width. Thinner p–n junction leads to reduced dark current density (0.5 µA cm −2 ), low trap density (5.71 × 10 8 cm −3 ), high mobility (417 cm 2 V −1 s −1 ), and hence increased responsivity (77.69 A W −1 ) for 30 µW cm −2 UV illumination under a low applied voltage of −15 V. A quick response time with a rise/fall duration of 22 ms/30 ms under 0 V and long-term stability for over 3 months in ambient airis achieved. To comprehend the performance with the thinner p–n junction-based photodiodes, the results under UV–Vis illumination are examined and compared. The outcomes hint at a method that holds promise for producing efficient photodiodes.
研究领域:
材料科学
·
光电技术
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Xianwei Meng,Bangdeng Du,Xueqing Chen,Qian Li,Jing Liu
The exceptional electron transport performance and high stability of titanium dioxide (TiO 2 ) make it widely used in the electron transport layer (ETL). However, the presence of numerous surface defects in TiO 2 layer can lead to unnecessary non-radiative recombination, which reduces carrier mobility and affects the photoelectric conversion efficiency (PCE) of perovskite solar cells (PSCs). Therefore, tremendous researches have been focused on reducing surface defects and improving carrier mobility in TiO 2 layer. In this study, we adopted metal gallium (Ga) with high conductivity at room temperature as an optimization strategy to enhance the performance of TiO 2 layer. By incorporating metal Ga into the TiO 2 precursor solution, we successfully fabricated a TiO 2 -Ga layer that exhibits reduced surface defects and optimized energy level structure. This provides an efficient pathway for electron transport in perovskite layer. Experimental results demonstrate that (methyl ammonium lead tribromide) MAPbBr 3 perovskite solar cell devices based on TiO 2 -Ga layer achieve nearly 24% higher PCE compared to those based on pure TiO 2 layer. This successful optimization strategy utilizing metal Ga offers novel insights and approaches for enhancing the performance of PSCs.
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Luoran Chen,Hu Wang,Wenqing Zhang,Fenghua Li,Zhiyuan Wang,Xueyan Wang,Yuchuan Shao,Jianda Shao
Recently, organometal halide perovskites (OHPs) have achieved significant advancement in photovoltaics, light-emitting diodes, X-ray detectors, and transistors. However, commercialization and practical applications were hindered by the notorious ion migration issue of OHPs. Here, we report a simple solvent-based surface passivation strategy with organic halide salts (methylammonium bromide (MABr) and phenylethylammonium bromide (PEABr)) to suppress the ion migration of MAPbBr3 single crystals. The surface passivation effect is evidenced by the stronger photoluminescence (PL) intensity and extended PL lifetime. Using the pulse voltage and continuous voltage current–voltage measurements, we found that single crystals with surface passivation showed negligible hysteresis on the surface due to the suppression of ion migration. As a result, the dark current stability of coplanar structure devices was significantly improved. Moreover, the vertical structure X-ray detectors with PEABr treatment exhibited a high sensitivity of 15 280 μC Gyair–1 cm–2 and a low detection limit of 87 nGyair s–1 under 5 V bias. The proposed technology would be a versatile tool to improve the performance of perovskite photoelectronic devices.
研究领域:
材料科学
·
光电技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Yunxiao Du,Pei Liu,Fangjie Li,Xiaoyi Hou,Huijie Zhang,Yunfan Shi,Shaofu Wang,Yuan Wang,Shishang Guo,Qidong Tai,Xingzhong Zhao
An optimized two-step sequential deposition method to fabricate hole-transport-layer-free carbon-based methyl ammonium lead bromide (MAPbBr 3 ) perovskite solar cells is reported. Small amounts of MABr are introduced into the PbBr 2 precursor solution during the first step to prepare MAPbBr 3 perovskite films (labeled as MAPB-xMABr), which promotes the conversion of PbBr 2 into perovskite phase and results in denser perovskite films with increased crystallinity, lower trap density, and longer carrier lifetime. After optimization, a maximum power conversion efficiency (PCE) of 7.64% ( V OC = 1.36 V) is obtained for MAPB-0.2MABr based solar cells. Significantly, the non-encapsulated devices exhibit excellent long-term stability in ambient air (25–30 °C and 20–30% relative humidity), showing no degradation after a year’s exposure. While, it also shows superior thermal stability with PCE retaining 95% of the initial efficiency after 120 h under thermal stress of 80 °C and 40–70% relative humidity.
研究领域:
材料科学
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能源工程
·
光伏技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Maosheng Chen,Xu Zhang,Chunhua Luo,Ruijuan Qi,Hui Peng,Hechun Lin
Waterborne polymers are advantageous in terms of cost, convenience, sustainability, and environmental friendliness. As lead halide perovskite (LHP) nanocrystals suffer from fast degradation in the presence of water, it is challenging to encapsulate LHP nanocrystals in waterborne polymers. In this work, luminescent MAPbBr3@PbBr(OH) nanocrystals were synthesized via the aqueous grinding process in the presence of 2-methyl-imidazole (2-MIM) and oleylamime (OAm). 2-MIM triggers the formation of the PbBr(OH) matrix, and OAm acts as a size-control ligand to control the size of MAPbBr3@PbBrOH particles in the nanoscale range. Highly stable waterborne luminescent inks were successfully prepared by blending MAPbBr3@PbBr(OH) nanocrystals with waterborne polymers, including poly(vinylpyrrolidone), poly(vinyl acetate), and acrylate resins. Owning to the dual protection of the polymer matrix and PbBr(OH) to LHP quantum dots (QDs), the luminescent films exhibit excellent stability to the environment under thermal and light irradiation. The ink can be used as a phosphor to fabricate down-converting green and white light-emitting diodes (LEDs). Waterborne anticounterfeiting inks suitable for screen printing were prepared via formula tuning for the anticounterfeit purpose. The anticounterfeiting luminescent patterns can be screen printed on paper, cloth, and poly(ethylene terephthalate) (PET), with encryption and decryption of information being accurately and conveniently realized by switching UV irradiation.
研究领域:
材料科学
·
光学工程
·
化学工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Dong Liu,Li Jiang,Xianyuan Jiang,Xue Sun,Guodong Zhang,Ying-Bo Lu,Yong Wang,Zhongchen Wu,Zongchen Ling
Comprehensive understanding and precise manipulation of the crystallization process for organic–inorganic hybrid perovskite materials are crucial for advancing perovskite single-crystal optoelectronic technology. In this study, we theoretically and experimentally investigated the influence of interface tension on the synthesis of perovskite single crystals. On the basis of the understanding of the nucleation and growth mechanisms, we developed a polydimethylsiloxane-assisted temperature-gradient growth technique to prepare high-quality MAPbBr3 single crystals. Using this technique, we harvested some high-quality MAPbBr3 single crystals, with the narrowest reported full width at half-maximum (0.00806°) of X-ray diffraction rocking curve, the longest carrier lifetime of 1002 ns, and an ultralow trap-state density of 4.25 × 109 cm–3. Furthermore, the X-ray detector fabricated using our MAPbBr3 single crystal exhibited a high sensitivity of 7275 μC Gy1– cm2 and a low minimum detection limit of 0.67 μGy s–1. This paper presents a novel method to control the crystallization and growth processes of high-quality perovskite single crystals.
研究领域:
材料科学
·
光电技术
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DOI
PubMed
高影响因子
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