JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xin Li,Jian Zhang,Jie Liu,Feng Zhang,Siyuan Luo,Huaiqiang Ba,Yu Zhang,Xuhui Xu,Zhichao Liu
Due to the sensitivity to water, the all-inorganic CsPbBr 3 nanocrystals have been widely applied in information encryption with spatial dimensions. However, the absence of time-dimension information limits the information capacity for the application of CsPbBr 3 . In this work, the CsPbBr 3 nanocrystal was combined with water-sensitive borophosphate glass, achieving decomposing/recrystallization of CsPbBr 3 nanocrystal with multi-dimension. The addition of SiO 2 confirms that the collapse of the borophosphate glass network structure causes the exposure of the CsPbBr 3 nanocrystals. The decomposition and recrystallization mechanism of CsPbBr 3 nanocrystals in glass-ceramics upon encountering water has been verified. Finally, an information encryption strategy, using the mixture of CsPbBr 3 glass ceramic and sodium carboxymethylcellulose as ink, is designed via adopting screen-printing technology, which not only provides a new idea for the preparation of CsPbBr 3 nanocrystals, but also establish a new avenue for the information encryption technology.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 23
·13925-13932
·
IF 10.7
Ruichen Bai,Bangzhi Ge,Xin Liu,Xinkai Peng,Xin Zhang,Shilin Liu,Menghua Zhu,Chongjian Zhou,Alain Dubois,Wanqi Jie,Yadong Xu
The understanding and suppression of grown-in defects are expected to promote the semiconductor radiation detector performance. Here, we report the origin of liquid inclusion defects in CsPbBr3 crystals grown using the inverse temperature crystallization (ITC) method. The formation process of liquid inclusions is observed in situ and simultaneously the formation mechanism for liquid inclusions in CsPbBr3 bulk crystals is proposed. Based on the COMSOL Multiphysics simulation, a model is developed combining concentration and temperature gradients, associated with natural convection during crystallization, and is responsible for the liquid inclusions. By introducing forced convection to eliminate liquid inclusions, the crystalline quality of CsPbBr3 has been significantly improved, with the half-peak width of X-ray rocking curves optimized from 0.101° to 0.037°. A near one order of magnitude increase in bulk resistivity has been obtained while the hole mobility was improved to 142.95 cm−2 V−1 s−1, evaluated by the time-of-flight technique according to α particle induced pulses. Furthermore, the CsPbBr3 crystals free from liquid inclusions enable the fabrication of an asymmetric planar Au/CsPbBr3/Sn device with an energy resolution of 7.2% illuminated with 137Cs@662 keV γ-rays.
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2020
·Vol. 8
·期 20
·2000977
·
IF 8.286
Qian Xiong,Sihao Huang,Juan Du,Xiaosheng Tang,Fanju Zeng,Zhengzheng Liu,Zeyu Zhang,Tongchao Shi,Jie Yang,Daofu Wu,Hao Lin,Zhongtao Luo,Yuxin Leng
In recent years, it has been reported that using ligands modification to passivate the surface is one reasonable approach to improve the optical properties and stability of perovskite quantum dots (QDs). However, a simple and effective way to diminish the aggregation phenomenon of perovskite QDs is still challenging. Herein, a ligand-engineering strategy is adopted to fabricate CsPbBr 3 QDs by applying a shorter capping ligand octylamine (OLA) to replace the commonly used long ligand oleylamine (OAm). After the ligand modification, the photoluminescence quantum yield of CsPbBr 3 QDs is enhanced from 62.4% to 91.3%. No aggregation or degradation phenomenon can be observed in solution even after being exposed to the air for 100 days. Moreover, the OLA-CsPbBr 3 QDs film can keep 96.8% of initial photoluminescence intensity even when stored under ambient condition for 5 weeks. Furthermore, the stimulated emission performance is investigated in terms of amplified spontaneous emission (ASE), and the ASE threshold of OLA-CsPbBr 3 QDs is only 24% of the OAm-CsPbBr 3 QDs threshold, and the ASE photostability is also enhanced. All the results suggest that the OLA ligand modification is an available strategy to improve the properties of CsPbBr 3 QDs and to shed light on the potential practical applications for photoelectric devices.
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 16
·165502
·
IF 3.551
Muhammad Imran Saleem,Shengyi Yang,Muhammad Sulaman,Jinming Hu,Perumal Veeramalai Chandrasekar,Yuansheng Shi,Ruonan Zhi,Attia Batool,Bingsuo Zou
Colloidal quantum dots (CQDs) are very promising nanomaterials for optoelectronics due to their tunable bandgap and quantum confinement effect. All-inorganic CsPbX3 (X = Br, Cl and I) perovskite nanocrystals (NCs) have attracted enormous interests owing to their promising and exciting applications in photovoltaic devices. In this paper, all-solution-processed UV-IR broadband trilayer photodetectors ITO/ZnO/PbS/CsPbBr3/Au and ITO/ZnO/CsPbBr3/PbS/Au with high performance were presented. The role of CsPbBr3 QDs layer as the carriers-extracting layer in the trilayer devices was discussed. As compared with bilayer device ITO/ZnO/PbS/Au, both the dark currents and photocurrents under illumination from trilayer photodetectors are enhanced, but the trilayer photodetector ITO/ZnO(80 nm)/PbS(150 nm)/CsPbBr3(50 nm)/Au showed a maximum specific detectivity (D*) of 8.3 × 1012 Jones with a responsivity (R) of 35 A W−1 under 1.6 mW cm−2 980 nm illumination. However, another trilayer photodetector ITO/ZnO(80 nm)/CsPbBr3(50 nm)/PbS(150 nm)/Au showed a maximum D* of 1.73 × 1012 Jones with a R of 5.31 A W−1 under 6.8 mW cm−2 405 nm illumination. Further, the underlying mechanism for the enhanced performance of trilayer photodetectors was discussed. Thus, this strategy of all-solution-processed heterojunction configuration paves a facile way for broadband photodetectors with high performance.
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Xuandong Wang,Jie He,Jieyuan Li,Gang Lu,Fan Dong,Tetsuro Majima,Mingshan Zhu
Direct conversion CO 2 to useful chemical fuels by photocatalysis has been considered to be a promising strategy for renewable energy production. The realization of this goal relies mainly on the development of photocatalysts with ideal charge separation efficiency. Here, we use all-inorganic perovskite nanocrystals (CsPbBr 3 ) immobilized on two-dimensional (2D) black phosphorus nanosheets (BP), resulting in a new and effective CsPbBr 3 /BP photocatalyst for CO 2 photoreduction. Compare to pristine CsPbBr 3 , the introduction of BP generates more active sites for facilitating CO 2 activation and trapped the excited electrons from CsPbBr 3 with high charge separation efficiency. Time-resolved photoluminescence and transient absorption measurements together with density functional theory calculations provide a clear elucidation of the charge separation pathways that contribute to the enhanced CO 2 conversion rate. This significant feature provides a new venue for constructing all-inorganic perovskite-based photocatalyst by combining with BP for solar energy conversion and artificial photosynthesis.
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2019
·
IF 2.687
Zhiliang Chen,Yating Zhang,Yu Yu,Yongli Che,Lufan Jin,Yifan Li,Qingyan Li,Tengteng Li,Haitao Dai,Jianquan Yao
Write Once Read Many (WORM) Memory, as one of the most important nonvolatile memory type, has widespread used in a variety of permanent storage applications in the Big Data age. As an excellent material, CsPbBr 3 quantum dots have widely used in a lot of photoelectric devices, but CsPbBr 3 quantum dots based memory device remain to be studied. In this work a WORM memory device based on CsPbBr 3 quantum dots is demonstrated. The CsPbBr 3 QDs based WORM shows great reproducibility, good data retention ability, irreversible electrical transition from the high resistance state (HRS) or OFF state to the low resistance state (LRS) or ON state and the resistance ratio (ON/OFF) can reach almost 10 4 . Additionally, the device exhibits high performances under low power consumption — low reading voltage (−0.5 V) and writing voltage (−1.1V). To study the CsPbBr 3 QDs based WORM provides an opportunity to develop the next generation high-performance and stable WORM devices.
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
·
IF 14.7
Zhang Xin,Bai Ruichen,Fu Yuhao,Hao Yingying,Peng Xinkai,Wang Jia,Ge Bangzhi,Liu Jianxi,Hu Yongcai,Ouyang Xiaoping,Jie Wanqi,Xu Yadong
α particles must be monitored to be managed as radioactive diagnostic agents or nuclear activity indicators. The new generation of perovskite detectors suffer from limited energy resolution, which affects spectroscopy and imaging applications. Here, we report that the solution-grown CsPbBr 3 crystal exhibits a low and stable dark current (34.6 nA·cm −2 at 200 V) by thinning the as-grown crystal to decrease the high concentration CsPb 2 Br 5 phase near the surface. The introduction of the Schottky electrode for the CsPbBr 3 detector further reduces the dark current and improves the high-temperature stability. An energy resolution of 6.9% is achieved with the commercial electronic system, while the effects of air scattering and absorption are investigated. Moreover, 1.1% energy resolution is recognized by a full-customized readout application-specific integrated circuit without any additional signal processing, which matches well with the given parameters of the CsPbBr 3 detector by reducing the parasitic capacitance and electronic noise.
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Yucong Ji,Lumeng Liang,Teng Ma,Jinning Hu,Ziyi Chen,Jun Chen
Inorganic perovskites have attracted much attention due to their excellent optical properties , making them a potential material for optoelectronic devices . In order to better apply it to optoelectronic devices, researchers have developed many synthesis schemes, for example, hot injection method, ligand-assisted reprecipitation method, template method, etc. to accurately control chemical composition, dimension, size, photoelectric and other properties. Here, we used oleylamine, octylamine, and phenylethylamine as amine ligands, and synthesized quantum dots (QDs) through the hot injection method. We found that quantum dot solutions prepared with long-chain ligands exhibit better luminescence performance, while quantum dot films prepared with shorter-chain phenethylamine ligands exhibit better luminescence performance, revealing the regulatory mechanism of amine ligands in the quantum dot growth process. In addition, we have enhanced the optical properties of perovskite films through laser direct writing , providing a reference for the synthesis and control of perovskite materials and their applications in the display.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2021
·Vol. 9
·期 11
·3806-3813
·
IF 7.393
Hui Fu,Huilin Hou,Zhi Fang,Chaoyi Chen,Weiyou Yang,Junqi Li,Jinju Zheng
In the present work, we report a strategy for aligned packaging of in situ grown CsPbBr3 nanorods (NRs) within polystyrene (PS) nanofibers (CsPbBr3 NR@PS) based on magnetic field assisted electrospinning for enhanced polarized luminescence properties. The as-constructed CsPbBr3 NR@PS fiber membrane exhibits an improved orientation and increased aspect ratio (AR) of the aligned CsPbBr3 NRs within the PS fibers with the increase of the external magnetic field strength. Consequently, their luminescence polarization ratio (P) can be fundamentally enhanced with the increase of the external magnetic field strength. The P of the sample prepared at a magnetic field of 150 mT reaches 0.23, which is 2.6 times that of the conventional analogue fabricated without a magnetic field, and close to the theoretical emission polarization one (Pem-theory), representing their potential applications in optical devices such as liquid crystal displays.
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 41
·19077-19086
·
IF 3.3
Yue Wang,Xi Wang,Hui Zhang,Shasha Gao,Wenjie Xu,Yulong Zhao,Mingzhi Jiao,Sheng Huang,Xiuquan Gu
In this work, a facile room-temperature (RT) solution-processing strategy was developed to synthesize perovskite CsPbBr3 quantum dots (QDs), which were then modified with Zn-based organic ligands for enhancing their ambient environment and moisture stability. The as-prepared perovskite QDs were well dispersed in a trimethylbenzene solvent with a small particle size of ∼9 nm. Afterwards, a sensor was fabricated by spin-coating perovskite QDs on an interdigital electrode, leading to a sensitivity of 0.025 towards 400 ppm ethanol gas as well as a response/recovery time of 3.9 s/3.6 s at RT. This excellent sensing performance is attributed to the high carrier mobility and adjustable crystal structure of perovskite CsPbBr3 QDs. Theoretical calculation results verified that the sensitivity towards ethanol might result from the formation of chemical bonds between perovskite QDs and Zn-based ligands, leading to a change of molecular orbital energy levels. Furthermore, with a combination of machine-learning algorithms, accurate recognition of ethanol was realized in an ambient environment with high humidity. Our research might be helpful to construct an intelligent sensor for application under complex conditions, such as coal mines and chemical factories.
✓ 已验证
DOI
高影响因子
NANO
·
2020
·
IF 1.566
Zhuang Liu,Jianlin Chen,Caiyou Huang,Too Gideon Kiprono,Wusong Zhao,Wei Qiu,Zhuoyin Peng,Jian Chen
In this paper, three kinds of SnO 2 precursors were comparatively investigated for low temperature solution-processed SnO 2 films as electron transport layers (ETL) of CsPbBr 3 perovskite solar cells (PSCs). It was found that the precursor state and solvent type played an important role on the crystallinity and film-forming performance of SnO 2 . All-inorganic hole-transport-layer-free planar CsPbBr 3 PSCs with an architecture of FTO/SnO 2 /CsPbBr 3 /carbon were fabricated. The best-performing device with SnO 2 as ETL by reflux condensation sol spin-coating technique delivered a champion power conversion efficiency (PCE) as high as 6.27%, with a short-circuit current density of 7.36 mA cm − 2 , an open-circuit voltage of 1.29 V, and a fill factor of 65.9%. It was comparable to the highest PCE record 6.7% of the device with the same structure based on TiO 2 -ETL so far. Moreover, the CsPbBr 3 devices without encapsulation exhibited good stability after being stored under ambient conditions with a relative humidity of ∼ 4 0 % at room temperature over 1000 h and 60 ∘ C for 720 h, respectively. The results promise the commercial potential of CsPbBr 3 PSCs using reflux condensation low-temperature solution-processed SnO 2 as ETLs for flexible polymer photovoltaic applications.
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL PHYSICS
·
2024
·Vol. 160
·期 16
·
IF 3.1
Du Luchao,An Jie,Katayama Tetsuro,Duan Menghan,Shi XiaoPing,Wang Yunpeng,Furube Akihiro
In recent years, all-inorganic perovskite materials have become an ideal choice for new thin film solar cells due to their excellent photophysical properties and have become a research hotspot. Studying the ultrafast dynamics of photo-generated carriers is of great significance for further improving the performance of such devices. In this work, we focus on the transient dynamic process of CsPbBr 3 /TiO 2 composite systems with different Mn 2+ doping contents using femtosecond transient absorption spectroscopy technology. We used singular value decomposition and global fitting to analyze the transient absorption spectra and obtained three components, which are classified as hot carrier cooling, charge transfer, and charge recombination processes, respectively. We found that the doping concentration of Mn 2+ has an impact on all three processes. We think that the following two factors are responsible: one is the density of defect states and the other is the bandgap width of perovskite. As the concentration of doped Mn 2+ increases, the charge transfer time constant shows a trend of initially increasing, followed by a subsequent decrease, reaching a turning point. This indicates that an appropriate amount of Mn 2+ doping can effectively improve the photoelectric performance of solar cell systems. We proposed a possible charge transfer mechanism model and further elucidated the microscopic mechanism of the effect of Mn 2+ doping on the interface charge transfer process of the CsPbBr 3 /TiO 2 solar cell system.
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）