检索结果-内蒙古大学图书馆

Optoelectronic Devices and Integration, OEDI 2015

作者： Zhou, Conghua Wang, Xingxing Liu, Gang Yang, Bingchu Zhang, Dou Li, Zhiyou Zhou, Kechao Institute of Super-Microstructure and Ultrafast Process in Advanced Materials School of Physics and Electronics Central South University Changsha410083 China State Key Laboratory for Powder Metallurgy Research Institute of Powder Metallurgy Central South University Changsha410083 China Hunan Key Laboratory for Super-microstructure and Ultrafast Process Changsha410083 China

TiO2 films with ordered porous structure were prepared by freezing and used to fabricate dye sensitized solar cells. Due to the enhanced light scattering by the ordered porous structure, Increase of 13% in photo-curre... 详细信息

ISBN: (纸本)9781943580019

关键词： Dye-sensitized solar cells

来源：评论

学校读者我要写书评

暂无评论

Van der Waals epitaxy of type-Ⅱ band alignment CsPbI_(3)/TMDC heterostructure for optoelectronic applications

引用

Frontiers of physics 2024年第5期19卷 95-107页

作者： Chang Lu Shunhui Zhang Meili Chen Haitao Chen Mengjian Zhu Zhengwei Zhang Jun He Lin Zhang Xiaoming Yuan Hunan Key Laboratory of Super Microstructure and Ultrafast Process School of PhysicsCentral South UniversityChangsha 410083China College of Advanced Interdisciplinary Studies&Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices National University of Defense TechnologyChangsha 410073China

Van der Waals epitaxy allows heterostructure formation without considering the lattice match requirement,thus is a promising method to form 2D/2D and 2D/3D *** the unique optical properties of CsPbI_(3) and transition metal dichalcogenides(TMDCs),their heterostructure present potential applications in both photonics and optoelectronics ***,we demonstrate selective growth of cubic phase CsPbI_(3) nanofilm with thickness as thin as 4.0 nm and Zigzag/armchair orientated nanowires(NWs)on monolayer WSe_(2).Furthermore,we show growth of CsPbI_(3) on both transferred WSe_(2) on copper grid and WSe_(2) based optoelectrical devices,providing a platform for structure analysis and device performance *** electron microscopy(TEM)results reveal the epitaxial nature of cubic CsPbI_(3) *** revealed growth fundamental of CsPbI_(3) is universal valid for other twodimensional substrates,offering a great advantage to fabricate CsPbI_(3) based van der Waals heterostructures(vdWHs).X-ray photoelectron spectroscopy(XPS)and optical characterization confirm the type-II band alignment,resulting in a fast charger transfer process and the occurrence of a broad emission peak with lower *** formation of WSe_(2)/CsPbI_(3) heterostructure largely enhance the photocurrent from 2.38 nA to 38.59 *** findings are vital for bottom-up epitaxy of inorganic semiconductor on atomic thin 2D substrates for optoelectronic applications.

关键词： van der Waals epitaxy band alignment growth fundamental charge transfer photodetector

来源：评论

学校读者我要写书评

暂无评论

Reduction of single-photon emission from a single-emitter system by intersystem crossing

引用

Physical Review A 2014年第1期89卷 013839-013839页

作者： Yong He Lin Dai []Institute of Super Microstructure and Ultrafast Process in Advanced Materials School of Physics and Electronics Central South University Changsha 410012 Hunan China

We investigate the reduction in the probability of single-photon emission from a single-emitter system caused by intersystem crossing. The physical model is that a single-emitter system with three levels is excited by a square pulse laser, and then a single photon is emitted at a controllable time. We find that the intersystem crossing always reduces the probability of single-photon emission. We obtain quantitative and analytical expressions for the probabilities of zero-, one-, and two-photon emission and Mandel's Q parameter as the function of the intersystem crossing rate under the conditions of finite field strength and finite interaction time with the laser pulse. We discuss the conditions for obtaining the maximal probability of single-photon emission in the presence of intersystem crossing. We find that one can obtain a high probability of single-photon emission from the single-emitter system using square pulse excitation in comparison with continuous wave excitation. Mandel's Q parameter exhibits a transition from a sub-Poissonian behavior to a super-Poissonian behavior due to the influence of intersystem crossing. The calculated Mandel's Q parameter and second-order correlation function of photon emission considering the coherent effect are in better agreement with the experimental data.

关键词： PHOTON emission INTERSYSTEM crossing (Chemistry) PROBABILITY theory CORRELATION (Statistics) LASER optical pulse COHERENT scattering

来源：评论

学校读者我要写书评

暂无评论

Interactive length of fundamental wave and second harmonic generated on the surface of anomalous dispersion medium

引用

Chinese Optics Letters 2019年第8期17卷 76-80页

作者： Xiaojing Wang Huaijin Ren Gang Wang Jun He Institute of Super-Microstructure and Ultrafast Process in Advanced Materials School of Physics and Electronics Central South University Changsha 410083 China Institute of Applied Electronics China Academy of Engineering Physics Mianyang 621900 China

In this Letter, a new method is presented to calculate the interactive length between the fundamental wave and second harmonic generation(SHG) for the configuration of total internal reflection on the inner surface of a nonlinear crystal. Three independent experiments are designed to measure the bandwidths of this second harmonic wave. The theoretical expression of the intensity of SHG is obtained through a nonlinear coupled wave equation. The interactive length of this phase-matched SHG can be calculated mathematically by utilizing the measured bandwidths and the intensity equation. There is no existing method to obtain the interactive length either from theoretical calculations or by experimental measurement. This method can be applied to estimate the extremely short interactive volume in nonlinear processes.

关键词： Letter calculate expression

来源：评论

学校读者我要写书评

暂无评论

A non-wetting and conductive polyethylene dioxothiophene hole transport layer for scalable and flexible perovskite solar cells

引用

Science China Chemistry 2021年第5期64卷 834-843页

作者： Chenxiang Gong Lin Zhang Xiangchuan Meng Zhi Xing Li Rao Hongyu Wang Zengqi Huang Licheng Tan Ting Hu Xiaotian Hu Yiwang Chen College of Chemistry Nanchang UniversityNanchang 330031China Institute of Polymers and Energy Chemistry Nanchang UniversityNanchang 330031China Hunan Key Laboratory for Super Microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China School of Materials Science and Engineering Nanchang UniversityNanchang 330031China Institute of Advanced Scientific Research(iASR) Jiangxi Normal UniversityNanchang 330022China

The regulated crystallization of perovskite and highly repeatable preparation are decisive challenges for large-scale flexible perovskite solar cells(PSCs).Herein,we synthesize an oil-soluble poly(3,4-ethylenedioxythiophene)(Oil-PEDOT)as a hole transport layer(HTL).The non-wetting Oil-PEDOT HTL can promote the quality of large-area flexible perovskite films because of its optimized crystallinity and *** Oil-PEDOT layer also delivers desirable conductivity and charge transport without a complex ***,the flexible PSCs with Oil-PEDOT HTL achieve an efficiency of 19.51%and 16.70%based on 1.05 and 22.50 cm^(2),***,these large-scale flexible PSCs demonstrate remarkable mechanical robustness,and the efficiency exhibits 93%retention after 7,000 bending *** results show that the Oil-PEDOT is a potentially efficient HTL for fabricating efficient large-scale flexible PSCs.

关键词： non-wetting dopant-free hole transport layer flexible solar cells large-scale

来源：评论

学校读者我要写书评

暂无评论

Solution evaporation processed high quality perovskite films

引用

Science Bulletin 2018年第23期63卷 1591-1596页

作者： Aqiang Liu Kang Liu Huimin Zhou Hongmei Li Xiaoqing Qiu Yang Yi Min Liu School of Physics and Electronics and Key Laboratory of Low-dimensional Quantum Structures and Quantum Control of the Ministry of Education Synergetic Innovation Center for Quantum Effects and Applications Hunan Normal University Institute of Super-microstructure and Ultrafast Process in Advanced Materials School of Physics and Electronics Central South University School of Chemistry and Chemical Engineering Central South University State Key Laboratory of Powder Metallurgy Central South University

Organic-inorganic hybrid perovskite solar cells(PSCs), due to their high power conversion efficiency(PCE) and low cost, have been considered as one of the most promising photovoltaic devices. Welldistributed large-grain perovskite crystals play an important role for light adsorption and charge ***, high quality perovskite crystals closely relate to the preparation method. Generally, the preparation of perovskite films requires a nitrogen atmosphere and toxic anti-solvents, which hinder their practical applications. Here, we reported a novel and simple solution evaporation process followed with a methylammonium iodide(MAI) solution immersion to prepare high quality perovskite films. Porous lead iodide(PbI_2) films were firstly formed by evaporation of PbI_2 precursor solution. The obtained porous PbI_2 films were completely transformed into well-distributed large-grain perovskite films after a quick MAI solution immersion. As a result, the corresponding PCE was enhanced by 30% compared to that prepared with a regular sequential deposition. This solution evaporation method provides a convenient and practical way for preparing high-quality perovskite films.

关键词： Perovskite Solution evaporation High-quality films Power conversion efficiency

来源：评论

学校读者我要写书评

暂无评论

Monolithic hole-conductor-free perovskite solar cells using TiO2 nanoparticle binding carbon films

Monolithic hole-conductor-free perovskite solar cells using ...

引用

第四届新型太阳能电池学术研讨会

作者： Fang Wan Xincan Qiu Liao Xu Institute of Super-microstructure and Ultrafast Process in Advanced Materials School of Physics and Electronics Central South University

Using TiO2 nanoparticles as binders, highly conductive carbon films were prepared and used to fabricate monolithic hole-conductor-free perovskite solar cell in *** films were condensed by dehydration reaction between surface hydroxyls from both TiO2 nanoparticles and carbon particles, which are beneficial for adhesion ability and conductivity of carbon film, and the formation and filling properties of perovskite crystallites in the monolithic structure of "FTO/C-TiO2/MTiO2/M-ZrO2/Carbon".A reduced sheet resistance from 10 to 2.74 ohm/sq was obtained for carbon films annealed under relatively low temperature annealing（from 150℃ to 450℃）.Confined distribution of perovskite crystallites in the region containing MTiO2/M-ZrO2 layers and bottom of carbon film was obtained from 350℃ annealing, which helped to achieve upgraded power conversion efficiency from 5.40（±1.32） % to 9.21（±1.04） %（averaged, reverse scan） and 11.07%（champion, reverse scan） at testing area of .18 cm2, as well as stability of 1000 h in relative high humidity environment（RH:70～90%）.The air-compatible fabrication process, sound device ability as well as lowcost of carbon materials make such carbon based monolithic device structure realistic candidate for mass production of perovskite solar cells.

关键词： perovskite solar cell Hole-conductor-free Carbon Monolithic TiO2 Stability

来源：评论

学校读者我要写书评

暂无评论

Solution Stability and Interface Modification for Printed Organic Photovoltaics

Solution Stability and Interface Modification for Printed Or...

引用

2013中国国际纳米产业技术发展论坛

作者： Junliang Yang Institute of Super-microstructure and Ultrafast Process in Advanced Materials School of Physics and ElectronicsCentral South University

来源：评论

学校读者我要写书评

暂无评论

Anisotropic in-plane thermal conductivity for multi-layer WTe_(2)

引用

Nano Research 2022年第1期15卷 401-407页

作者： Yuehua Wei Chuyun Deng Xiaoming Zheng Yangbo Chen Xiangzhe Zhang Wei Luo Yi Zhang Gang Peng Jinxin Liu Han Huang Weiwei Cai Qi Ge Renyan Zhang Xueao Zhang Shiqiao Qin College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China College of Arts and Sciences National University of Defense TechnologyChangsha 410073China College of Physical Science and Technology Xiamen UniversityXiamen 361005China Hunan Key Laboratory of Super-microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China Chongqing 2D Materials Institute Liangjiang New AreaChongqing 400714China

Improving thermal transport between substrate and transistors has become a vital solution to the thermal challenge in *** 2D WTe_(2) has sparked extensive interest because of heavy atomic mass and low Debye ***,the thermal transport of supported WTe_(2) was studied via Raman thermometry with electrical *** supported 30 nm WTe2 encased with 70 nm Al_(2)O_(3) delivered 4.8 W·m^(-1)·K^(-1)in-plane thermal conductivity along zigzag direction at room temperature,which was almost 1.6 times larger than that along armchair direction(3.0 W·m^(-1)·K^(-1)).Interestingly,the superior and inferior directions for thermal transport are just opposite of those for electrical ***,a heat manipulation model in WTe_(2) FET device was *** the designed configuration,waste heat in WTe_(2) would be mostly dissipated to metal contacts located along zigzag,relieving the local temperature discrepancy in the channel effectively and preventing degradation or *** study provides new insight into thermal transport of anisotropic 2D materials,which might inspire energy-efficient nanodevices in the future.

关键词： WTe_(2) anisotropy in-plane thermal conductivity Raman thermometry with electrical heating Raman spectrum

来源：评论

学校读者我要写书评

暂无评论

Research progress on hybrid organic-inorganic perovskites for photo-applications

引用

Chinese Chemical Letters 2020年第12期31卷 3055-3064页

作者： Zengxi Wei Yuhang Zhao Jie Jiang Weibo Yan Yuezhan Feng Jianmin Ma Advanced Catalytic Engineering Research Center of the Ministry of Education School of Physics and ElectronicsHunan UniversityChangsha 410082China Hunan Key Laboratory of Super Microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410082China Key Laboratory for Organic Electronics and Information Displays&Institute of Advanced Materials(1AM) Nanjing University of Posts&TelecommunicationsNanjing 210023China Key Lxiboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002China

Hybrid organic-inorganic perovskite materials have attracted significant atte ntion of most re searchers in recently years,which is ascribed to the superior photoelectric properties,such as the suitable band gaps for harvesting sunlight,and exhibit high optical adsorption,high charge-carrier lifetimes and long diffusion *** photodetectors,light-emitting diodes,solar cells and photocatalysts represent the remarkable applications for the hybrid organic-inorganic perovskite ***,we review the recent progress of hybrid organic-inorganic perovskite-based photodetectors,light-emitting diodes,solar cells and *** challenges and outlook for the hybrid organic-inorganic perovskitebased photodetectors,light-emitting diodes,solar cells and photocatalysts are considered.

关键词： Hybrid organic-inorganic perovskite Photodetectors Light-emitting diodes Solar cells Photocatalysts

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：