ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Xiaobin Zhan,Xuning Zhang,Zhiyong Liu,Chen Chen,Lingxian Kong,Shulan Jiang,Shuang Xi,Guanglan Liao,Xingyue Liu
All-inorganic CsPbCl3 perovskite in ultraviolet (UV) detection is drawing increasing interest owing to its UV-matchable optical band gap, ultrahigh UV stability, and superior inherent optoelectronic properties. Almost all of the reported CsPbCl3 photodetectors employ CsPbCl3 nano- or microstructures as sensitive components, while CsPbCl3 polycrystalline film-based self-powered photodetectors are rarely studied on account of the terrible precursor solubility. Herein, a novel sequential vapor-deposition technique is demonstrated to fabricate CsPbCl3 polycrystalline film for the first time. High-quality CsPbCl3 films with excellent optical, electronic, and morphological features are obtained. A self-powered photodetector based on the CsPbCl3 film is constructed without any charge transport layer, showing a high UV detection performance. A thin p-type PbS buffer layer is further introduced to passivate the surface defects of the CsPbCl3 layer and decrease the interfacial energy barrier by forming a type-II heterojunction, contributing to a faster hole extraction rate and a suppressed dark current level. The best-performing device achieves an ultrafast response time of 1.92 μs, an ultrahigh on/off ratio of 2.22 × 105, and a responsivity of 0.22 A/W upon 375 nm UV illumination at 0 V bias. This comprehensive performance is the best among all of the CsPbCl3 photodetectors reported to date. The as-prepared photodetectors also present an eminent UV irradiation and long-term durability in ambient air. Furthermore, a large-area and uniform 625-pixel UV image sensor is fabricated and attains a prominent imaging capability. Our work opens a new avenue for the scalable production of CsPbCl3-based optoelectronics.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Wenzhi Wang,Shuo Song,Jinkai Li,Bingqiang Cao,Zongming Liu
Halide perovskite quantum dots (QDs) have been considered to be a potential emitting materials for illumination and display applications. Unfortunately, the toxicity and poor stability can greatly limit their practical application. Herein, the Mn 2+ -doped CsPbCl 3 and SiO 2 -coated Cs(Pb,Mn)Cl 3 perovskite QDs have been developed to solve the tricky problem without affecting their optical properties . Firstly, the mono-dispersed pure CsPbCl 3 perovskite QDs with cubic morphologies are prepared by using a modified hot-injection method, as a control group. Next, the low-Pb content Cs(Pb,Mn)Cl 3 perovskite QDs with distinctive dual emission peaks has been successfully obtained, including the CsPbCl 3 host emission and the Mn 2+ emission. Based on this, a new strategy for synthesizing single Cs(Pb,Mn)Cl 3 @SiO 2 core-shell QDs with their initial cubic morphology and optical properties has been developed, which using the Cs(Pb,Mn)Cl 3 nanoparticles as a precursor and choosing the APTES as the surface ligand. Photo-stability tests indicate that the Cs(Pb,Mn)Cl 3 and Cs(Pb,Mn)Cl 3 @SiO 2 perovskite QDs are markedly more stable than the pure CsPbCl 3 QDs, indicating that the crystal engineering and host packaging are all effective way to improve the stability. Meanwhile, the PL intensity of Cs(Pb,Mn)Cl 3 @SiO 2 dispersed in a mixed solution of toluene and water can retained 63% of the initial value even after 14 h, which are much higher than Cs(Pb,Mn)Cl 3 (31%). Therefore, the Cs(Pb,Mn)Cl 3 after SiO 2 coating is the more effective way to improve stability than that of the Mn 2+ doping. This work not only provides a simple and reliable synthesis way to synthesize the single core-shell particles, which can be suitable for other perovskite systems, but also compares the two methods of the crystal engineering and the host packaging to improve the stability of perovskite QDs for practical application.
研究领域:
材料科学
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纳米技术
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光电技术
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Shuo Wang,Shuhan Zhang,Xin Li,Dan Huang,William W. Yu,Liang Wang
Near-infrared (NIR) emission underpins biomedical imaging, night vision, and optical communication. Yb 3+ -doped CsPbCl 3 have demonstrated ultrahigh photoluminescence quantum yields via quantum cutting, primarily enabled by a singular defect-assisted energy transfer pathway arising from the substitution of Pb 2+ by Yb 3+ . However, whether additional pathways exist to facilitate visible (VIS)-to-NIR conversion, thereby further enhancing the performance of NIR-emissive devices, remains an open and compelling question. Here, strategic engineering of localized bound excitons (BEs) is proposed in the thermally evaporated CsPbCl 3 :Yb system. Assisted BEs significantly promote energy transfer from CsPbCl 3 matrix to Yb dopants, unveiling a previously unknown excitonic energy transfer channel. Atomic-scale characterization combined with first-principles calculations uncovers a BE-driven excitonic transfer mechanism, specifically implicating Cs-vacancy-induced defects in mediating exciton behavior. These insights lead to the fabrication of high-performance NIR-LEDs with an 8.9% external quantum efficiency and 410 mW·Sr −1 ·m −2 radiance, marking a breakthrough in thermally evaporated NIR (>950 nm) light-emitting diodes.
研究领域:
光电子学
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材料科学
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钙钛矿发光二极管
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能量转移物理
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纳米材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Ting Fan,Jian-tao Lü,Wen-qiang Deng,Jun-xian Mai,Jie Liang,Ting-ting Deng,Wen Fan,Qin-song Zhou,Qi-feng Lin
Water-soluble Mn 2+ doped CsPbCl 3 nanocrystals coating by 6-aminocaproic acid (ACA) ligand were prepared by a simple ligand assisted reprecipitation method at room temperature. The CsPbCl 3 :Mn 2+ /ACA nanocrystals were almost cubic phase and had mean size of about 10 nm. Due to the coating and passivation of ACA, the CsPbCl 3 :Mn 2+ /ACA nanocrystals retained the initial fluorescence intensity of 20% after being dispersed in deionized water for 20 days. The orange LED device based on CsPbCl 3 :Mn 2+ /ACA nanocrystals were prepared with excellent luminescence properties. In the cytotoxicity test, even if the MCF-7 cells were cultured for 24 h at the concentration of CsPbCl 3 :Mn 2+ /ACA nanocrystals as high as 160 μg·ml −1 , the cell survival rate was still 70%. Confocal fluorescent cell imaging results showed that the nanocrystals had remarkable fluorescent cell imaging effect even after 24 h. The synthesized CsPbCl 3 :Mn 2+ /ACA nanocrystals have nice water solubility, good water stability, low cytotoxicity and highly luminescence properties, and have great application potential in the field of orange LED and fluorescent probes .
研究领域:
材料科学
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纳米技术
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生物医学工程
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光电技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 67
·39315-39322
·
IF 3.049
Chang Liu,Jing Lin,Wei Zhai,Zhikai Wen,Xin He,Mengmeng Yu,Yang Huang,Zhonglu Guo,Chao Yu,Chengchun Tang
Doping metal ions in inorganic halide perovskite (CsPbX3, X = Cl, Br, I) nanocrystals (NCs) endows the NCs with unique optical characteristics, and has thus attracted immense attention. However, controllable synthesis of high-quality doped perovskite NCs with tunable morphology still remains challenging. Here, we report a facile, effective and unified strategy for the controllable synthesis of Mn-doped CsPbCl3 quantum dots (QDs) and nanoplatelets (NPLs) via a single-step solvothermal method. The incorporation of Mn2+ into CsPbCl3 NCs introduces new broad photoluminescence (PL) emission from Mn2+ while maintaining the structure of host CsPbCl3 NCs nearly intact. The PL intensity, emission peak position and size of the NCs can be accurately adjusted by altering the experimental parameters such as Mn-to-Pb feed ratio and reaction time. Especially, by changing the amount of ligands, Mn-doped CsPbCl3 QDs, NPLs or their mixtures can be obtained. Both of the Mn-doped QDs and NPLs exhibit a size-dependent quantum confinement effect, which is confirmed by the relationship between the size of NCs and the exciton emission peaks. The solvothermal reaction condition plays an important role for the precise control of the structure, morphology and PL properties of the Mn-doped NCs. The as-prepared Mn-doped CsPbCl3 NPLs with thickness down to ∼2 nm exhibit a PL quantum yield (PLQY) of more than 22%. This work introduces a new strategy for the controllable synthesis of Mn-doped perovskite NCs, which provides ideas for the in-depth study of the dope-and-grow process and can be extended to approaches of doping other metal ions.
研究领域:
材料科学
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纳米技术
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光电技术
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·
IF 5.2
Zhuwei Gu,Ke Xing,Sheng Cao,Bingsuo Zou,Jialong Zhao
ABSTRACT Mn 2+ doped CsPbCl 3 (Mn 2+ :CsPbCl 3 ) nanocrystals (NCs) have attracted considerable attention due to their unique strong and broad orange-red emission band, presenting promising applications in the field of photoelectric devices. However, pristine Mn 2+ :CsPbCl 3 NCs commonly suffer from low photoluminescence quantum yield (PL QY) and stability issues. Herein, we introduced europium ions (Eu 3+ ) into Mn 2+ :CsPbCl 3 NCs via the thermal injection synthesis method to obtain high performance Eu 3+ and Mn 2+ codoped CsPbCl 3 (Eu 3+ /Mn 2+ :CsPbCl 3 ) NCs. The maximum PL QY of the resulting Eu 3+ /Mn 2+ :CsPbCl 3 NCs reaches up to 90.92%. It is found that the doping of Eu 3+ ions significantly reduces the non-radiative recombination caused by high defect states, and improves the energy transfer efficiency from exciton to Mn 2+ , thereby boosting the PL performance. Moreover, doping Eu 3+ ions notably improves the UV-light and water stability of Mn 2+ :CsPbCl 3 NCs. We further demonstrate the application versatility of Eu 3+ /Mn 2+ :CsPbCl 3 NCs in white light emitting diodes (WLEDs) and optical anti-counterfeiting applications. This work provides a valuable perspective for the attainment of high performance Mn 2+ :CsPbCl 3 NCs and lays a foundation for the codoping of other lanthanide ions to adjust the luminescence properties of Mn 2+ :CsPbCl 3 NCs.
研究领域:
材料科学
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纳米技术
·
光电
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Yingtong Zhou,Yulu Hua,Shuo Li,Jiaqi Zhang,Haibo Wang,Wenxu Yin,Xiaoyu Zhang,Weitao Zheng,Andrey L. Rogach
Achieving efficient and stable blue-emitting quasi-two-dimensional (quasi-2D) perovskite light-emitting diodes (LEDs) remains a challenge due to the poor solubility of conventional chloride precursors and the difficulty to form thick, uniform films with a well-controlled phase distribution. A new strategy is proposed to address this challenge using CsPbCl 3 quantum dots (QDs) capped with oleylamine (OLA) ligands as an alternative chlorine source. It is demonstrated how the use of these QDs enables formation of quasi-2D perovskite films with vertically aligned crystalline structure, thickness over 100 nm, and improved stability. OLA ligands regulate the crystal phase distribution and grain boundaries, suppressing the appearance of small- n 2D phases and reducing the number of crystal defects, while inorganic CsPbCl 3 QD cores induce vertical crystallization of quasi-2D perovskite films, endowing them with enhanced structural stability. The use of this non-conventional chlorine source is proven instrumental in improving external quantum efficiency of quasi-2D perovskite sky-blue LEDs, reaching 26.2% at 485 nm, with significantly enhanced electroluminescence stability both in terms of peak position and brightness. This study demonstrates a novel methodology using CsPbCl 3 QDs capped with conventional organic ligands to achieve thick quasi-2D perovskite layers for blue LEDs, addressing existing limitations in perovskite optoelectronics.
研究领域:
材料科学
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纳米技术
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光电子学
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半导体器件
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薄膜技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 17
·5667-5679
·
IF 6.4
Shulan Jiang,Zeliang Hou,Xin Zheng,Qian Wu,Xiaoqi Yang,Wuqiong Cai,Ying Yi,Siyi Cheng,Guojun Wen,Xingyue Liu
The emerging wide-bandgap and chemically stable CsPbCl3 perovskites are of significant interest by virtue of their broad application prospects in high-precision ultraviolet (UV) detection. Although many fabrication techniques have been developed to improve the quality of CsPbCl3 polycrystalline films for their use in self-powered UV photodetectors, the high intrinsic trap density in the surface and grain boundaries of the films restricts the improvement of the device performance. Herein, organic choline chloride (ChCl) is introduced to passivate the surface and grain boundary defects of the evaporated CsPbCl3 films. Systematic experimental characterization and theoretical calculations validate that the bond formation between the ChCl and uncoordinated positively charged Pb2+ cations helps to alleviate the Cl− vacancy defects and Pb–Cl antisite substitution defects as well as enhance the structural stability of CsPbCl3 perovskites. The ChCl modification can also tailor the band alignment and expand the built-in potential of the device, conducive to the charge extraction and suppression of the non-radiative recombination loss. Thus, the ChCl-modified photodetectors exhibit a pronouncedly augmented UV detection performance compared to their non-modified counterparts. The best-performing photodetector achieves a fast UV response speed of 1.85 μs, a high on/off ratio of up to 3.91 × 105 and an excellent specific detectivity of 8.64 × 1012 Jones in a self-driven mode. In addition, the ChCl-modified device presents superior comprehensive stability when exposed to consecutive UV light soaking, humidity and heat, conspicuously promoting the practical applications of CsPbCl3-based UV detectors.
研究领域:
材料科学
·
光电子学
·
光子学
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Weiwei Chen,Tongchao Shi,Juan Du,Zhigang Zang,Zhiqiang Yao,Meng Li,Kuan Sun,Wei Hu,Yuxin Leng,Xiaosheng Tang
As an outstanding less-Pb candidate, doping Mn2+ ions into perovskite quantum dots (QDs) has received significant interest in the application of light-emitting diodes (LEDs). However, their further applications are impeded by poor chemical instability. Here, the silica-wrapped Mn-doped CsPbCl3 QDs are fabricated via hydrolyzing (3-aminopropyl) triethoxysilane with improved operational stability. Also, the photoluminescence quantum yield as high as 55.4% for the CsPbMnCl3@SiO2 composite is achieved. Silica wrapping can protect the perovskite QDs from damage by temperature and humidity as well as anion exchange. Furthermore, white LED devices are prepared by employing the mixture of green CsPbBr3 QDs and orange-red CsPbMnCl3@SiO2 composites. The as-obtained white LED device operated at a forward current of 20 mA exhibits bright natural light with a high luminous efficiency of 77.59 lm/W, and the corresponding color rendering index of 82 and color temperature (CCT) of 3950 K are obtained. Additionally, the electroluminescence spectrum shows nearly no variation after 24 h operation. This work will promote the Mn-doped CsPbCl3 QDs material to the practical application in solid-state LEDs.
研究领域:
材料科学
·
纳米技术
·
光电技术
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Xinlong Yan,Chen Peng,Weimin He,Weiheng Duan,Yi Lu,Kan Zhang,Yuzhen Jia,Ruichen Wang,Weihu Yang,Shiguo Liu,Hetong Han,Zhaohui Song,Fan Yang
Generally, the light output (LO) of scintillators decreases after the gamma-ray irradiation. However, the LO enhancement is observed in CsPbCl 3 crystals after gamma-rays irradiation at doses of 10 2 , 10 3 , 10 4 and 10 5 rad. A new luminescence band around 580 nm with a decay time of 12 μs is observed after the irradiation. Its intensity depends on the integrated dose of irradiation. A positive correlation between its intensity and LO is observed, illustrating the LO enhancement can be attributed to the new luminescence band. The absorption wavelength of radiation induced color centers at 2.84 eV is consistent with the excitation wavelength of the new luminescence band. There is a positive correlation between the concentration of color centers at 2.84 eV and the intensity of the new luminescence band. It indicates the new luminescence band is attributed to the luminescence of radiation induced color centers. Considering the high mobility of Cl − ions in the CsPbCl 3 crystal, it is speculated the radiation induced color centers may be vacancies of Cl − ions. The intensity of the new luminescence band decreases with time, which is attributed to the annihilation of radiation induced color centers at room temperature. The study provides valuable insights into the performance of CsPbCl 3 crystal under high irradiation. It also explains the abnormal LO enhancement in CsPbCl 3 crystals after gamma-ray irradiations, which may be useful to understand the defects of inorganic halide perovskite crystals.
研究领域:
材料科学
·
核物理
·
光学材料
·
钙钛矿半导体
·
辐射探测
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Fangrong Qin,Muhammad Amin Padhiar,Shusheng Pan,Noor Zamin Khan,Yongqiang Ji,Sayed Ali Khan,Jahangeer Ahmed,Shaolin Zhang
All inorganic perovskite nanocrystals (NCs) have emerged as versatile materials for gas sensing due to their tunable optical properties and high surface-to-volume ratios. However, CsPbCl3 has limitations when it comes to gas sensing. In this study, we explore the potential of Mn2+-doped CsPbCl3 NCs as a room-temperature sensing platform for ammonia (NH3) gas detection. By incorporating Mn2+ dopants into the CsPbCl3 lattice, we enhance the sensitivity of the NCs to NH3 gas. Additionally, NH3 molecules interact with the NCs, leading to the dynamic passivation of Cl– vacancies. We systematically investigate the sensing performance of Mn:CsPbCl3 NCs by using varying NH3 concentrations, different exposure conditions, and exposure cycles, revealing a reversible and concentration-dependent response. The sensor based on Mn2+-doped CsPbCl3 NCs has good selectivity for NH3 at room temperature, showing a higher sensitivity (2.12 at 100 ppm) than the pure CsPbCl3 NC sensor (1.10 at 100 ppm), and good repeatability. The unique optical properties of Mn:CsPbCl3 NCs, coupled with their responsiveness to NH3, make them promising candidates for developing efficient and cost-effective room-temperature NH3 gas sensors. This work contributes to the advancement of NC-based gas sensing technologies and highlights the potential of Mn-doped CsPbCl3 NCs in environmental monitoring, industrial safety, and other gas sensing applications.
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 105
·期 7
·4763-4774
·
IF 4.186
Nanchuan Wang,Shibo Guo,Qiaochu Chen,Fengmei Gao,Weiyou Yang,Hui Fu,Jinju Zheng
The thermodynamically viable halogen vacancy defects in CsPbCl 3 perovskite nanocrystals (NCs) are considered the main factor in weakening their optical quality. However, their separate impact on the dopant emission in Mn 2+ -doped CsPbCl 3 perovskite NCs is still under exploration owing to the absence of comparable samples. Herein, a series of Mn 2+ -doped CsPbCl 3 samples were synthesized with different oleylamine-Cl (OAm-Cl) contents based on a halogen-hot-injection strategy. It is found that the Mn 2+ concentration of as-prepared samples fixed at 0.65%, and the Mn 2+ photoluminescence (PL) also exhibited an OAm-Cl content-independent lifetime of ∼ 1.78 ms, implying the efficient and identical luminescence of isolated Mn 2+ ion in all samples. In contrast, the excitonic and Mn 2+ PL intensities of the NCs are strong related to the amount of OAm-Cl, which are attributed to the coordination effect of the suppressed excitonic nonradiative recombination owing to the passivation of chloride vacancies and the enhanced energy transfer from the host exciton to Mn 2+ ions in the samples with sufficient OAm-Cl contents. The temperature-dependent of Mn 2+ PL disclosed an initial increase and was followed by a decrease with increasing temperature for the samples with relatively higher OAm-Cl contents, while it monotonously decreases for the sample with lower OAm-Cl content of 0.4 mL. The different PL intensity change trend results from the effective passivation of chloride vacancies by extra OAm-Cl. Above results present here will help clarify the underlying influence mechanism of halogen vacancy on the PL properties of Mn 2+ -doped perovskite NCs, which is essential for targeted modulation of their optical properties.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）