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学者姓名：张永哲
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摘要 ：
Organic-inorganic perovskite single crystals are promising in the field of optoelectronics due to their excellent optoelectronic properties. However, the ion transport of perovskite precursor is poor in confined spaces, which results in difficulty in the preparation of perovskite single-crystal films. Herein, MAPbBr3 films consisting of square grains were fabricated by the surface-confined process using the organic molecule PEAI (phenethylammonium iodide). Under the effect of oversaturation gradient, PEA+ is combined with the surface of perovskite grain from top to side, which constrains the lateral growth of grains and induces a downward growth of perovskite, leading to the formation of square grains. With the improvement of concentration PEAI, the perovskite film exhibits a decreased side length of grains (from 0.98 to 12.96 μm) and increased grain number and coverage, as well as crystallinity. The perovskite single crystalline grain films with PEAI showed double photoluminescence (PL) emission peaks due to the existence of iodine-rich perovskite. This work may provide a practical way to fabricate high-quality perovskite films for perovskite photoelectronic devices.
关键词 ：
MAPbBr3 MAPbBr3 perovskite perovskite phenethylammonium iodide (PEAI) phenethylammonium iodide (PEAI) single crystal single crystal surface-confined process surface-confined process
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| GB/T 7714 | Yan Shao Xin , Han Chang Bao , Huang Jianhua et al. Organic Molecule Assisted Growth of Perovskite Films Consisting of Square Grains by Surface-Confined Process. [J]. | Nanomaterials , 2021 , 11 (2) . |
| MLA | Yan Shao Xin et al. "Organic Molecule Assisted Growth of Perovskite Films Consisting of Square Grains by Surface-Confined Process." . | Nanomaterials 11 . 2 (2021) . |
| APA | Yan Shao Xin , Han Chang Bao , Huang Jianhua , Chen Yichuan , Zhang Xiaobo , Chen Xiaoqing et al. Organic Molecule Assisted Growth of Perovskite Films Consisting of Square Grains by Surface-Confined Process. . | Nanomaterials , 2021 , 11 (2) . |
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摘要 ：
All-inorganic perovskites have emerged in the field of optoelectronic devices for their excellent light absorption and energy conversion efficiencies, as well as their superior stability compared to organic-inorganic perovskites. The two-dimensional (2D) all-inorganic perovskites have a higher exciton binding energy and carrier recombination efficiency than their bulk counterparts due to the quantum confinement effect, which indicts high strong light-matter interactions and is suitable for special integrated optoelectronics such as a micro laser or quick-response photodetector. However, it is difficult to fabricate a 2D large-sized sample with high crystal quality due to the nonlayered structure, which limits its further research and practical application. In this work, based on an atmospheric pressure chemical vapor deposition strategy combining a space-confined method and van der Waals epitaxy, the synergistic effect of these two techniques results in large-sized ultrathin all-inorganic CsPbI3 perovskite nanosheets for which the lateral dimension can exceed 50 mu m while the smallest thickness can reach 3 nm. The high crystal quality of the square-like samples has been confirmed by a microstructure characterization, while the corresponding performances like long carrier life (360 ns), high resistivity, and good stability were also verified, implying great promise for their applications in high-performance integrated optoelectronics. This method may pave the way for a uniform fabrication of other 2D nonlayered materials as well.
关键词 ：
all-inorganic perovskite nanosheet all-inorganic perovskite nanosheet APCVD APCVD integrated optoelectronics integrated optoelectronics space-confined method space-confined method van der Waals epitaxy van der Waals epitaxy
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| GB/T 7714 | He, Yeming , Ma, Yang , Li, Xuhong et al. All-Inorganic Perovskite Nanosheet Fabrication under Synergistic Effect for Integrated Optoelectronics with Strong Light-Matter Interactions [J]. | ACS APPLIED NANO MATERIALS , 2021 , 4 (3) : 2634-2641 . |
| MLA | He, Yeming et al. "All-Inorganic Perovskite Nanosheet Fabrication under Synergistic Effect for Integrated Optoelectronics with Strong Light-Matter Interactions" . | ACS APPLIED NANO MATERIALS 4 . 3 (2021) : 2634-2641 . |
| APA | He, Yeming , Ma, Yang , Li, Xuhong , Zhang, Yongzhe . All-Inorganic Perovskite Nanosheet Fabrication under Synergistic Effect for Integrated Optoelectronics with Strong Light-Matter Interactions . | ACS APPLIED NANO MATERIALS , 2021 , 4 (3) , 2634-2641 . |
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摘要 ：
高校基层党组织广泛植根于高校教育和教学科研的最前沿,与广大高校师生有着最为紧密的联系,基层党建工作开展得是否入脑入心对高校落实好“培养什么人、怎样培养人、为谁培养人”起着重要的作用.结合现有高校教师党支郎书记选配现状及面临的挑战,总结了“双带头人”教师党支部书记的特点及优势,并以一个高校“双带头人”教师党支部书记工作室为例,探索出一套可示范推广的工作机制和工作方法.
关键词 ：
工作机制 工作机制 党支部书记 党支部书记 双带头人 双带头人
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| GB/T 7714 | 王丽梅 , 张永哲 , 刘玮 . 高校“双带头人”教师党支部书记工作室工作机制探索 [J]. | 北京教育（高教版） , 2021 , (3) : 74-76 . |
| MLA | 王丽梅 et al. "高校“双带头人”教师党支部书记工作室工作机制探索" . | 北京教育（高教版） 3 (2021) : 74-76 . |
| APA | 王丽梅 , 张永哲 , 刘玮 . 高校“双带头人”教师党支部书记工作室工作机制探索 . | 北京教育（高教版） , 2021 , (3) , 74-76 . |
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摘要 ：
高校基层党组织广泛植根于高校教育和教学科研的最前沿,与广大高校师生有着最为紧密的联系,基层党建工作开展得是否入脑入心对高校落实好"培养什么人、怎样培养人、为谁培养人"起着重要的作用。结合现有高校教师党支部书记选配现状及面临的挑战,总结了"双带头人"教师党支部书记的特点及优势,并以一个高校"双带头人"教师党支部书记工作室为例,探索出一套可示范推广的工作机制和工作方法。
关键词 ：
党支部书记 党支部书记 双带头人 双带头人 工作机制 工作机制
引用：
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| GB/T 7714 | 王丽梅 , 张永哲 , 刘玮 . 高校“双带头人”教师党支部书记工作室工作机制探索 [J]. | 北京教育(高教) , 2021 , (03) : 74-76 . |
| MLA | 王丽梅 et al. "高校“双带头人”教师党支部书记工作室工作机制探索" . | 北京教育(高教) 03 (2021) : 74-76 . |
| APA | 王丽梅 , 张永哲 , 刘玮 . 高校“双带头人”教师党支部书记工作室工作机制探索 . | 北京教育(高教) , 2021 , (03) , 74-76 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
高校“双带头人”教师党支部书记工作室工作机制探索
关键词 ：
党支部书记 党支部书记 双带头人 双带头人 工作机制 工作机制
引用：
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| GB/T 7714 | 王丽梅 , 张永哲 , 刘玮 et al. 高校“双带头人”教师党支部书记工作室工作机制探索 [J]. | 王丽梅 , 2021 , (3) : 74-76 . |
| MLA | 王丽梅 et al. "高校“双带头人”教师党支部书记工作室工作机制探索" . | 王丽梅 3 (2021) : 74-76 . |
| APA | 王丽梅 , 张永哲 , 刘玮 , 北京教育:高教版 . 高校“双带头人”教师党支部书记工作室工作机制探索 . | 王丽梅 , 2021 , (3) , 74-76 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Several valuable scientific investigations have been conducted these last few years in materials design and device engineering for perovskite solar cells (PSCs) to make them competitive compared to traditional silicon-based photovoltaic technologies. Consequently, high power conversion efficiency beyond 25% is nowadays reported. However, their long-term stability remains a significant challenge to overcome. Herein, the influence of fluorinated compounds on each layer of PSCs devices and their impact on the resulted device performances and stability is spotlighted. The fluorinated compounds exhibit attractive properties due to their very high electronegativity attributed to the fluorine atom, and their strong hydrophobicity. Thus, the introduction of these compounds is found to be a successful strategy to positively suppress the surface trap states, enhancing charge collection and reducing interfacial charge recombination. Besides, a better film quality and better energy level alignment is obtained, resulting in the improvement of device photovoltaic parameters such as the open-circuit voltage (Voc ), short-circuit current (Jsc ), and fill factor (FF), and then, the device's overall power conversion efficiency (PCE). Their long-term stability is also found to further be improved.
关键词 ：
fluorinated compounds fluorinated compounds perovskite solar cells perovskite solar cells power conversion efficiency power conversion efficiency stability stability
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| GB/T 7714 | Ouedraogo Nabonswende Aida Nadege , Yan Hui , Han Chang Bao et al. Influence of Fluorinated Components on Perovskite Solar Cells Performance and Stability. [J]. | Small , 2021 , 17 (8) : e2004081 . |
| MLA | Ouedraogo Nabonswende Aida Nadege et al. "Influence of Fluorinated Components on Perovskite Solar Cells Performance and Stability." . | Small 17 . 8 (2021) : e2004081 . |
| APA | Ouedraogo Nabonswende Aida Nadege , Yan Hui , Han Chang Bao , Zhang Yongzhe . Influence of Fluorinated Components on Perovskite Solar Cells Performance and Stability. . | Small , 2021 , 17 (8) , e2004081 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
As one of the most promising photovoltaic materials, the efficiency of inorganic-organic hybrid halide perovskite solar cells (PSCs) has reached 25.5% in 2020. However, the stability and hysteresis remain primary challenges before it can become a commercial photovoltaic technology. Therefore, those issues have drawn significant attention for photovoltaic applications. In this work, a study of the PSCs hysteresis improvement is presented based on a combination of first-principles simulations, scanning electron microscopy images, and time-dependent photocurrent measurements. It indicates the hysteresis led by the ion migration and accumulation is mainly localized at the two interfaces: one is between electron transport layer and active layer, and the other is between active layer and hole transport layer. Considering the massive defects at the grain boundaries (GBs), they lower the potential barriers significantly. The defect density at GBs is therefore reduced via the in situ passivation of PbI2 crystals. The hysteresis index is decreased from 22.43% down to 1.04%, and results in an improvement in efficiency from 17.12% up to 20.10%. Following the understanding of defect-induced hysteresis, an approach to improve the hysteresis is provided, which can be integrated into the fabrication process and widely applied to enhance the performance of PSCs.
关键词 ：
hysteresis hysteresis in situ X-ray diffraction in situ X-ray diffraction ions migration ions migration time-dependent photocurrent time-dependent photocurrent
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| GB/T 7714 | Chen, Yichuan , Zhou, Wencai , Chen, Xiaoqing et al. In Situ Management of Ions Migration to Control Hysteresis Effect for Planar Heterojunction Perovskite Solar Cells [J]. | ADVANCED FUNCTIONAL MATERIALS , 2021 . |
| MLA | Chen, Yichuan et al. "In Situ Management of Ions Migration to Control Hysteresis Effect for Planar Heterojunction Perovskite Solar Cells" . | ADVANCED FUNCTIONAL MATERIALS (2021) . |
| APA | Chen, Yichuan , Zhou, Wencai , Chen, Xiaoqing , Zhang, Xiaobo , Gao, Hongli , Ouedraogo, Nabonswende Aida Nadege et al. In Situ Management of Ions Migration to Control Hysteresis Effect for Planar Heterojunction Perovskite Solar Cells . | ADVANCED FUNCTIONAL MATERIALS , 2021 . |
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摘要 ：
In recent years, colloidal quantum dots (CQDs) have been widely used in optoelectronic devices due to their advantages including low cost, solution processability, substrate compatibility, and easily tuned photoelectric characteristicsviathe quantum size effect. However, there are several factors still limiting the further improvement of performances for CQD optoelectronic devices: (1) the incomplete surface passivation of CQDs; (2) a trade-off between absorption and photogenerated carrier collection; and (3) the poor air stability. This review focuses on the methods for performance improvement of CQD-based photoelectric conversion devices including photovoltaic solar cells and photodetectors. Taking CQD solar cells as an example, different surface passivation methods are summarized. To increase the separation and collection of photogenerated carriers, the device architecture is optimized by aligning the energy band and broadening the depletion width. Additionally, device performance can be further enhanced through interface modification which could decrease recombination. In the next section, recent progress in the development of CQD near-infrared (NIR), short-wave infrared (SWIR), and mid-wave infrared (MWIR) photodetectors is reviewed. To overcome the traditional photodetection limitations posed by the dark current/sensitivity/bandwidth trade-off, innovative device architectures are developed. Finally, this review discusses the application of CQD photodetectors in infrared imaging. © The Royal Society of Chemistry 2021.
关键词 ：
Dark currents Dark currents Economic and social effects Economic and social effects Infrared devices Infrared devices Infrared radiation Infrared radiation Nanocrystals Nanocrystals Passivation Passivation Photodetectors Photodetectors Photoelectricity Photoelectricity Photons Photons Semiconductor quantum dots Semiconductor quantum dots Solar cells Solar cells Sols Sols Thermography (imaging) Thermography (imaging)
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| GB/T 7714 | Gong, Wei , Wang, Peng , Dai, Dichao et al. Infrared colloidal quantum dots for photoelectric conversion devices [J]. | Journal of Materials Chemistry C , 2021 , 9 (9) : 2994-3025 . |
| MLA | Gong, Wei et al. "Infrared colloidal quantum dots for photoelectric conversion devices" . | Journal of Materials Chemistry C 9 . 9 (2021) : 2994-3025 . |
| APA | Gong, Wei , Wang, Peng , Dai, Dichao , Liu, Zekang , Zheng, Leyin , Zhang, Yongzhe . Infrared colloidal quantum dots for photoelectric conversion devices . | Journal of Materials Chemistry C , 2021 , 9 (9) , 2994-3025 . |
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摘要 ：
The effect of plasma excitation frequency on the performance of intrinsic hydrogenated amorphous silicon (a-Si:H) films and heterojunction solar cells by radio-frequency (RF, 13.56 MHZ) and very-high-frequency (VHF, 40 MHZ) plasma-enhanced chemical vapor deposition (PECVD) have been investigated. The thickness and microstructure of intrinsic a-Si:H films were measured by spectroscopic ellipsometry and Fourier transform infrared spectroscopy (FTIR). The a-Si:H/c-Si interface passivation quality were determined by minority carrier lifetime and transmission electron microscopy (TEM). The current-voltage (I-V) performance of the HJT solar cells were also evaluated. The results reveal that a-Si:H films developed by RF-PECVD with a large area of parallel-plate reactors (> 1 m(2)) exhibit better thickness uniformity, lower microstructure factor, and higher minority carrier lifetimes. Hence HJT solar cells have achieved efficiency of 24.9%, compared with cell efficiency of 24.6% with intrinsic a-Si:H films developed by VHF-PECVD.
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| GB/T 7714 | Wang, Jianqiang , Ru, Xiaoning , Ruan, Tianyu et al. Performance of heterojunction solar cells with different intrinsic a-Si:H thin layers deposited by RF- and VHF-PECVD [J]. | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2021 , 32 (20) : 25327-25331 . |
| MLA | Wang, Jianqiang et al. "Performance of heterojunction solar cells with different intrinsic a-Si:H thin layers deposited by RF- and VHF-PECVD" . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS 32 . 20 (2021) : 25327-25331 . |
| APA | Wang, Jianqiang , Ru, Xiaoning , Ruan, Tianyu , Hu, Yunfei , Zhang, Yongzhe , Yan, Hui . Performance of heterojunction solar cells with different intrinsic a-Si:H thin layers deposited by RF- and VHF-PECVD . | JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS , 2021 , 32 (20) , 25327-25331 . |
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摘要 ：
When the power conversion efficiency (PCE) of perovskite solar cells (PSCs) rapidly approaches that of commercial solar cells, the stability becomes the most important obstacle for the commercialization of PSCs. Aside from the widely studied slow PCE degradation, the PSCs also show a unique rapid PCE degradation. Although the degradation due to oxygen and humidity can be avoided by encapsulation, that due to bias voltage, light and heat could not be effective suppressed and will lead to considerable degradation. Usually, the rapid PCE degradation is believed to be from ion migration. However, a systematic investigation is yet to be carried out. This work quantitatively and systematically investigated the relationships between external fields (bias voltage, light or heat), ion migration and device performance. By comparing the performance of reference PSCs after 90 min degradation under these fields, we conclude that (1) the electric field affects the spatial distribution of mobile ions; (2) the light field changes the mobile ion densities and drives the ion migration; (3) the heat field results in perovskite decomposition as well as changing the mobile ion densities. In addition to the analysis of the reference device, we experimentally proved that the improved device stability upon introducing phenethylammonium iodide (PEAI) or poly-methyl methacrylate (PMMA) layers originates from the inhibition of mobile ion density and migration.
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| GB/T 7714 | Zhang, Xiaobo , Chen, Xiaoqing , Chen, Yichuan et al. Rapid degradation behavior of encapsulated perovskite solar cells under light, bias voltage or heat fields [J]. | NANOSCALE ADVANCES , 2021 , 3 (21) : 6128-6137 . |
| MLA | Zhang, Xiaobo et al. "Rapid degradation behavior of encapsulated perovskite solar cells under light, bias voltage or heat fields" . | NANOSCALE ADVANCES 3 . 21 (2021) : 6128-6137 . |
| APA | Zhang, Xiaobo , Chen, Xiaoqing , Chen, Yichuan , Ouedraogo, Nabonswende Aida Nadege , Li, Jingjie , Bao, Xiulong et al. Rapid degradation behavior of encapsulated perovskite solar cells under light, bias voltage or heat fields . | NANOSCALE ADVANCES , 2021 , 3 (21) , 6128-6137 . |
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