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学者姓名：张新平
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摘要 ：
<正>由于具有多激励、宽谱响应、插入损耗小和响应速度快等优势, VO_2是一种理想的THz波主动调制材料。但是,由于传统半导体基底存在缺乏柔性、热容大、热导率低和不导电等问题,在硬质基底上难以实现高性能VO_2基THz波主动调制器件。为解决上述问题,申请人将VO2生长在顺排CNT薄膜上。顺排CNT薄膜具有沿CNT轴向有序排列的特性。
关键词 ：
偏振方向 偏振方向 二氧化钒 二氧化钒 THz THz 太赫兹波调制器 太赫兹波调制器
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| GB/T 7714 | 马赫 , 王钰 , 张新平 . 超低激发阈值柔性二氧化钒太赫兹波调制器 [J]. | 量子电子学报 , 2021 , 38 (01) : 123 . |
| MLA | 马赫 等. "超低激发阈值柔性二氧化钒太赫兹波调制器" . | 量子电子学报 38 . 01 (2021) : 123 . |
| APA | 马赫 , 王钰 , 张新平 . 超低激发阈值柔性二氧化钒太赫兹波调制器 . | 量子电子学报 , 2021 , 38 (01) , 123 . |
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摘要 ：
<正>有机太阳能电池中,活性层吸收光子后产生激子,激子扩散到给体、受体界面处实现分离,从而产生载流子,载流子传输到电极处被电极收集后产生光电流。其中激子扩散是有机太阳能电池产生光电流的重要环节,对器件效率有重要影响。本研究以时间分辨荧光光谱作为主要的研究工具,通过三种方法,分别研究了高效率有机太阳能电池给体和受体材料中的激子扩散过程。其中激子表面淬灭法是在交联的富勒烯材料和石英衬底上分别制备相同厚度的有机半导体给体薄膜,通过测量在不同衬底上的荧光寿命,得出由激子扩散导致的荧光淬灭,从而计算出激子的扩散长度。
关键词 ：
有机太阳能电池 有机太阳能电池 光谱学研究 光谱学研究 扩散长度 扩散长度
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| GB/T 7714 | 张一伟 , 张新平 . 高效有机太阳能电池中激子扩散超快光谱学研究 [J]. | 量子电子学报 , 2021 , 38 (01) : 126 . |
| MLA | 张一伟 等. "高效有机太阳能电池中激子扩散超快光谱学研究" . | 量子电子学报 38 . 01 (2021) : 126 . |
| APA | 张一伟 , 张新平 . 高效有机太阳能电池中激子扩散超快光谱学研究 . | 量子电子学报 , 2021 , 38 (01) , 126 . |
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摘要 ：
基于空芯光纤内壁的SERS微腔结构及其激光加工方法，属于属于等离激元纳米光子学和传感器技术领域。提出了一种分布于空芯光纤内壁的三维等离激元纳米结构激光加工方法，工艺过程的自动控制和高效，激光直写加工可以批量制备新型SERS检测基底。空芯光纤SERS基底大大提高SERS检测信号的三维反馈与收集。
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| GB/T 7714 | 张新平 , 穆云云 , 李佳俊 et al. 基于空芯光纤内壁的SERS微腔结构及其激光加工方法 : CN202110045821.7[P]. | 2021-01-13 . |
| MLA | 张新平 et al. "基于空芯光纤内壁的SERS微腔结构及其激光加工方法" : CN202110045821.7. | 2021-01-13 . |
| APA | 张新平 , 穆云云 , 李佳俊 , 刘淼 . 基于空芯光纤内壁的SERS微腔结构及其激光加工方法 : CN202110045821.7. | 2021-01-13 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
We report fabrication of large-scale homogeneous crystallization of CH3NH3PbBr3 (MAPbBr(3)) in the patterned substrate by a two-dimensional (2D) grating. This achieves high-quality optotelectronic structures on local sites in the micron scales and a homogeneous thin-film device in a centimeter scale, proposing a convenient technique to overcome the challenge for producing large-area thin-film devices with high quality by spin-coating. Through matching the concentration of the MAPbBr(3)/DMF solutions with the periods of the patterning structures, we found an optimized size of the patterning channels for a specified solution concentration (e.g., channel width of 5 mu m for a concentration of 0.14 mg/mL). Such a design is also an excellent scheme for random lasing, since the crystalline periodic networks of MAPbBr(3) grids are multi-crystalline constructions, and supply strong light-scattering interfaces. Using the random lasing performance, we can also justify the crystallization qualities and reveal the responsible mechanisms. This is important for the design of large-scale optoelectronic devices based on thin-film hybrid halide perovskites.
关键词 ：
hybrid halide perovskites hybrid halide perovskites large-scale thin-film networks large-scale thin-film networks periodical grids periodical grids random lasing random lasing two-dimensional patterning two-dimensional patterning
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| GB/T 7714 | Hu, Jingyun , Xue, Haibin , Zhang, Xinping . Two-Dimensional Crystalline Gridding Networks of Hybrid Halide Perovskite for Random Lasing [J]. | CRYSTALS , 2021 , 11 (9) . |
| MLA | Hu, Jingyun et al. "Two-Dimensional Crystalline Gridding Networks of Hybrid Halide Perovskite for Random Lasing" . | CRYSTALS 11 . 9 (2021) . |
| APA | Hu, Jingyun , Xue, Haibin , Zhang, Xinping . Two-Dimensional Crystalline Gridding Networks of Hybrid Halide Perovskite for Random Lasing . | CRYSTALS , 2021 , 11 (9) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Surface-enhanced Raman scattering (SERS) has been widely used owing to its high sensitivity and rapid response. In particular, 3D SERS-active platforms greatly extend the interaction area and ensure the ability to directly detect trace amounts of molecules in liquids. A silver-coated capillary, with the ability of liquid sampling and light guiding, provides a new platform for high-performance SERS substrates. In this paper, the silver mirror reaction was used for coating silver on the outer wall of the capillary. PDMS was used as a coating material to protect the silver film. Because of the silver coating, Mie scattering and Raman scattering in the liquid channel can be refocused and reflected back which greatly reduces the propagation loss and extends the interaction length. An enhancement factor as high as 10(8) and a detection limit of 10(-10) M of rhodamine 6G in aqueous solution have been achieved. Moreover, the SERS intensity is homogeneous across the end face of the liquid channel, with the relative standard deviation (RSD) value changing within 7%. The large area and high homogeneity greatly reduce the requirement of light coupling precision and liquid injection pressure. Using a common flange optical fiber connector, the capillary can be simply connected and aligned with a multimode fiber with a detection limit of 10(-8) M. The experiment results show great potential for the development of an optofluidic integrated system in the future.
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| GB/T 7714 | Kang, Chen , Sun, Zhoutao , Fang, Xiaohui et al. Molecular trace detection in liquids using refocusing optical feedback by a silver-coated capillary [J]. | NANOSCALE ADVANCES , 2021 . |
| MLA | Kang, Chen et al. "Molecular trace detection in liquids using refocusing optical feedback by a silver-coated capillary" . | NANOSCALE ADVANCES (2021) . |
| APA | Kang, Chen , Sun, Zhoutao , Fang, Xiaohui , Zha, Lei , Han, Yu , Liu, Hongmei et al. Molecular trace detection in liquids using refocusing optical feedback by a silver-coated capillary . | NANOSCALE ADVANCES , 2021 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Photoelectronic performance of organic-inorganic hybrid perovskites has been investigated extensively. Advancement in optoelectronic characterization and application of this group of materials in solar cells, light-emitting diodes, and lasers has been pushed forward rapidly. However, nonlinear optical properties for applications in optical logic devices have not been exploited. Moreover, long-lived excitons and charges limit the response speed of such materials and further construction of ultrafast devices. In this work, we make use of the high third-order optical nonlinearity of (CH3NH3)PbBr3 single crystals and develop a femtosecond optical switch (OS) based on strong two-photon processes through absorbing one pump and one probe photon. The fascinating band structure, with a steep edge at 2.22 eV between the transmission and strong absorption bands, endows single crystals of (CH3NH3)PbBr3 with perfect characteristics for two-photon optical switching in the near infrared. An on-off ratio of the probe pulses of about 90% and a speed faster than 400 fs have been achieved for this OS device. To the best of our knowledge, such high efficiency has not been realized for an ultrafast OS with any other materials and devices. Moreover, this is a first exploration, to our best knowledge, of the third-order optical nonlinearity of organic-inorganic hybrid halide perovskites for application in ultrafast optical logic devices with high reliability and low threshold in the near infrared. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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| GB/T 7714 | Zhang, Xinping , Wang, Meng , Ma, Lin et al. Ultrafast two-photon optical switch using single crystal hybrid halide perovskites [J]. | OPTICA , 2021 , 8 (5) : 735-742 . |
| MLA | Zhang, Xinping et al. "Ultrafast two-photon optical switch using single crystal hybrid halide perovskites" . | OPTICA 8 . 5 (2021) : 735-742 . |
| APA | Zhang, Xinping , Wang, Meng , Ma, Lin , Fu, Yulan , Guo, Jinxin , Ma, He et al. Ultrafast two-photon optical switch using single crystal hybrid halide perovskites . | OPTICA , 2021 , 8 (5) , 735-742 . |
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摘要 ：
The robust material tunability of the hybrid organic-inorganic perovskite (HOIP) has attracted considerable research interests to explore the application in photoelectronic devices. Huge hysteresis has been recognised as a main problem in HOIP-based photoelectric devices; the origin of hysteresis has been attributed to the ion migration and trap states in HOIP materials. In this study, we designed and synthesised a HOIP single crystal with one-dimensional structure where the PbI42- octahedron is caged by the organic chains. The ion migration can be dramatically suppressed by the quantum size effect. Besides, in the single crystal trap states density is ultra-low due to the absence of grain boundaries. As a result, photodetectors based on this 1D HOIP single crystal show negligible hysteresis I-V curves. Moreover, a high quality ohmic contact is formed between electrodes and 1D HOIP, which is beneficial for photocarrier extraction. A responsivity of 80 mA W-1 and EQE of 30% are realised. The response speed is determined to be less than 0.4 ms. In addition, the photodetectors based on the novel 1D single crystal present good stability; after 3 months of ambient storage, 85% of its original photocurrent generation ability is retained.
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| GB/T 7714 | Zhang, Yiwei , Liu, Fengjing , Jiang, Chao et al. A perovskite single crystal with one-dimensional structure enables photodetection with negligible hysteresis [J]. | JOURNAL OF MATERIALS CHEMISTRY C , 2021 , 9 (10) : 3470-3476 . |
| MLA | Zhang, Yiwei et al. "A perovskite single crystal with one-dimensional structure enables photodetection with negligible hysteresis" . | JOURNAL OF MATERIALS CHEMISTRY C 9 . 10 (2021) : 3470-3476 . |
| APA | Zhang, Yiwei , Liu, Fengjing , Jiang, Chao , Tang, Fawei , Zhang, Xinping . A perovskite single crystal with one-dimensional structure enables photodetection with negligible hysteresis . | JOURNAL OF MATERIALS CHEMISTRY C , 2021 , 9 (10) , 3470-3476 . |
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摘要 ：
Charge-transfer states have been observed extensively in heterojunctions of organic semiconductors, which are also referred to as exciplexes in polymer blends. Such mechanisms have been well understood in the conventional material systems. However, electromer states may be produced only in some polymeric molecules with folded chains. We report here the interaction between exciplex and electromer states, which facilitates the formation of a new electrically excited state that we define as a secondary exciplex. This is an indirect process understood as an electromer-mediated heterojunction. We discovered such an optoelectronic mechanism in the blend film of poly(9,9'-dioctylfluorene-co-bis-N,N'-(4-butylphenyl)-bis-N,N'-phenyl,4-phenylene-diamine) (PFB) and poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt(benzo[2,1,3]thiadiazol-4,8-diyl)] (F8BT). Four emission bands can be resolved from the electroluminescence spectrum, including those based on the excitons, the electromers, and the primary and secondary exciplexes. The whole electroluminescence spectrum thus extends from the green (500 nm) to the near-infrared (900 nm) with a full bandwidth of 400 nm. These new discoveries with the conventional light-emitting polymers are important not only for polymeric optoelectronics, but also for the development of broadband light-emitting devices.
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| GB/T 7714 | Zhang, Xinping , Yang, Qiaohui , Fu, Yulan et al. Secondary Exciplex by Electromer Mediated Charge Transfer for Multiband Electroluminescence [J]. | ACS MACRO LETTERS , 2021 , 10 (10) : 1236-1242 . |
| MLA | Zhang, Xinping et al. "Secondary Exciplex by Electromer Mediated Charge Transfer for Multiband Electroluminescence" . | ACS MACRO LETTERS 10 . 10 (2021) : 1236-1242 . |
| APA | Zhang, Xinping , Yang, Qiaohui , Fu, Yulan , Zhang, Yiwei . Secondary Exciplex by Electromer Mediated Charge Transfer for Multiband Electroluminescence . | ACS MACRO LETTERS , 2021 , 10 (10) , 1236-1242 . |
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摘要 ：
Ultrafast optical switch based on plasmonic nanostructures has large application potentials in optical logic circuits and optical communication systems. Integration of plasmonic optical switching devices with optical fibers is a breakthrough for realizing practical applications in long-range optical data transmission or communication techniques. Here, the incorporation of plasmonic optical switch devices onto the end facets of optical fibers is reported, so that the switched optical signals are generated by interaction between femtosecond laser pulses and plasmonic nanostructures on one end of the fiber, and are delivered via the fiber waveguide to the other end for detection or decoding. "Quenching" of localized surface plasmon in the gold nanowires by its interaction with band-edge modulation in gold through strong optical excitation is the responsible photophysics. This work accomplishes for the first time the implementation of ultrafast plasmonic optical switch device on optical fiber tips for logic data transmission.
关键词 ：
end facets end facets flexible transfer flexible transfer higher‐ higher‐ integration with optical fibers integration with optical fibers order localized surface plasmons order localized surface plasmons plasmonic nanostructures plasmonic nanostructures ultrafast optical switch ultrafast optical switch
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| GB/T 7714 | Yang, Jinghui , Zhang, Xinping . Optical Fiber Delivered Ultrafast Plasmonic Optical Switch [J]. | ADVANCED SCIENCE , 2021 , 8 (10) . |
| MLA | Yang, Jinghui et al. "Optical Fiber Delivered Ultrafast Plasmonic Optical Switch" . | ADVANCED SCIENCE 8 . 10 (2021) . |
| APA | Yang, Jinghui , Zhang, Xinping . Optical Fiber Delivered Ultrafast Plasmonic Optical Switch . | ADVANCED SCIENCE , 2021 , 8 (10) . |
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摘要 ：
We present experimental and theoretical investigations of the photophysics in the one-dimensional (1D) hybrid organic-inorganic perovskite (HOIP) white-light emitter, [DMEDA]PbBr4. It is found that the broadband-emission nature of the 1D perovskite is similar to the case of two-dimensional (2D) HOIP materials, exciton self-trapping (ST) is the dominant mechanism. By comprehensive spectroscopic investigations, we observed direct evidence of exciton crossing the energy barrier separating free and ST states through quantum tunnelling. Moreover, we consider the lattice shrinking mechanisms at low temperatures and interpret the ST exciton formation process using a configuration coordinate diagram. We propose that the energy barrier separating free and ST excitons is temperature-dependent, and consequently, the manner of excitons crossing it is highly dependent on the exciting energy and temperature. For excitons located at the bottom of the free excitonic states, the quantum tunnelling is the dominant channel to the ST states.
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| GB/T 7714 | Zhang Yiwei , Fu Yulan , Tang Fawei et al. Exciton Self-Trapping Dynamics in 1D Perovskite Single Crystals: Effect of Quantum Tunnelling. [J]. | The journal of physical chemistry letters , 2021 , 12 (19) : 4509-4516 . |
| MLA | Zhang Yiwei et al. "Exciton Self-Trapping Dynamics in 1D Perovskite Single Crystals: Effect of Quantum Tunnelling." . | The journal of physical chemistry letters 12 . 19 (2021) : 4509-4516 . |
| APA | Zhang Yiwei , Fu Yulan , Tang Fawei , Zhang Xinping . Exciton Self-Trapping Dynamics in 1D Perovskite Single Crystals: Effect of Quantum Tunnelling. . | The journal of physical chemistry letters , 2021 , 12 (19) , 4509-4516 . |
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