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载流子选择性接触:高效硅太阳电池的选择

物理学报 2017年第15期66卷 312-318页

作者：肖友鹏高超王涛周浪南昌大学光伏研究院南昌330031

太阳电池可看成由光子吸收层和接触层两个基本单元组成,接触层是高复合活性金属界面和光子吸收层之间的区域.为了进一步提高硅太阳电池的转换效率,关键是降低光子吸收层和接触之间的复合损失.近年来,载流子选择性接触引起了光伏界的研... 详细信息

太阳电池可看成由光子吸收层和接触层两个基本单元组成,接触层是高复合活性金属界面和光子吸收层之间的区域.为了进一步提高硅太阳电池的转换效率,关键是降低光子吸收层和接触之间的复合损失.近年来,载流子选择性接触引起了光伏界的研究兴趣,其被认为是接近硅太阳电池效率理论极限的最后的障碍之一.本文分析了三种类型的载流子选择性接触:在光子吸收层与金属界面之间引入薄的重掺杂层,即所谓的发射极或背面场;利用两种材料之间的导带或价带对齐;利用高功函数的金属氧化物与晶硅接触从而在晶硅中感应能带弯曲.基于一维太阳电池模拟软件wx AMPS,模拟了扩散同质结硅太阳电池[结构为(p^+)c-Si/(n)c-Si/(n^+)c-Si]、非晶硅薄膜硅异质结太阳电池[结构为(p^+)a-Si/(i)a-Si/(n)c-Si/(i)a-Si/(n^+)a-Si]和氧化物薄膜硅异质结太阳电池[结构为(n)MoO_x/(n)c-Si/(n)TiO_x]暗态下的能带结构和载流子浓度的空间分布,其中c-Si为晶硅;a-Si为非晶硅;(i),(n)和(p)分别表示本征、n型掺杂和p型掺杂.模拟结果表明:载流子选择性接触的核心是在接触处晶硅表面附近形成载流子浓度空间分布的不对称进而使得电导率的不对称,形成了对电子的高阻和空穴的低阻或者对空穴的高阻和电子的低阻,从而让空穴轻松通过同时阻挡电子,或者让电子轻松通过同时阻挡空穴,形成空穴选择性接触或者电子选择性接触.

关键词：硅太阳电池载流子选择性接触电导率不对称

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硒化亚锗异质结太阳电池模拟研究

物理学报 2023年第24期72卷 332-342页

作者：肖友鹏王怀平冯林东华理工大学核技术应用教育部工程研究中心南昌330013 东华理工大学机械与电子工程学院南昌330013

薄膜太阳电池技术中研究的热点之一是寻找能够替代碲化镉和铜铟镓硒的吸收层材料,近来具有优异材料和光电特性的硒化亚锗(germanium selenide,GeSe)进入了科研人员的视野.影响异质结太阳电池性能的主要是各功能层材料的材料特性和构筑... 详细信息

薄膜太阳电池技术中研究的热点之一是寻找能够替代碲化镉和铜铟镓硒的吸收层材料,近来具有优异材料和光电特性的硒化亚锗(germanium selenide,GeSe)进入了科研人员的视野.影响异质结太阳电池性能的主要是各功能层材料的材料特性和构筑的器件结构以及结构中异质结界面处的界面特性.本文以GeSe为吸收层,配备了性能稳定的无机材料TiO_(2)和Cu_(2)O分别作为太阳电池的电子输运层和空穴输运层,构筑了结构为FTO/TiO_(2)/GeSe/Cu_(2)O/Metal的异质结太阳电池.选用TiO_(2)和Cu_(2)O作为载流子输运层是因为两者分别与吸收层GeSe形成小的尖峰状的导带带阶和价带带阶,不会妨碍多子输运的同时能有效抑制界面处载流子的复合.接着利用wxAMPS软件模拟分析了有关功能层材料参数和异质结界面特性以及工作温度对太阳电池性能参数的影响,结合实际应用选定相关材料参数,优化后300 K温度下GeSe异质结太阳电池的开路电压Voc为0.752 V,短路电流Jsc为40.71 mA·cm^(-2),填充因子FF为82.89%,转换效率η为25.39%.研究结果表明结构为FTO/TiO_(2)/GeSe/Cu_(2)O/Au的太阳电池有成为高效、低毒和低成本的太阳电池的潜力,同时模拟分析也为设计和制备异质结太阳电池提供一定借鉴.

关键词：硒化亚锗二氧化钛氧化亚铜太阳电池模拟

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CIGS薄膜太阳电池柔性化

电源技术 2015年第12期39卷 2788-2791页

作者：肖友鹏江西科技学院机械工程学院江西南昌330098

铜铟镓硒(copper indium gallium di Selenide,CIGS)被公认为最佳的薄膜太阳电池材料之一,CIGS薄膜太阳电池是一种高效的薄膜太阳电池。分析了柔性CIGS薄膜太阳电池的结构、衬底材料的选择、扩散垒的作用、吸收层和缓冲层的制备和特性,... 详细信息

铜铟镓硒(copper indium gallium di Selenide,CIGS)被公认为最佳的薄膜太阳电池材料之一,CIGS薄膜太阳电池是一种高效的薄膜太阳电池。分析了柔性CIGS薄膜太阳电池的结构、衬底材料的选择、扩散垒的作用、吸收层和缓冲层的制备和特性,介绍了不锈钢箔、铝箔聚酰亚胺等柔性衬底CIGS薄膜太阳电池的研发情况,最后展望了柔性CIGS薄膜太阳电池的应用前景。

关键词：铜铟镓硒薄膜太阳电池衬底柔性化

基于PVsyst的户用独立光伏发电系统优化设计

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电源技术 2016年第7期40卷 1454-1457页

作者：肖友鹏江西科技学院机械工程学院江西南昌330098

基于PVsyst软件优化设计户用独立光伏发电系统,模拟系统运行性能。系统能量利用率为69.2%,用户需求满足率为94.3%,设计的独立光伏发电系统整体性能表现良好。为了提高系统设计的可靠性、效率、精度,工程技术人员应该利用PVsyst软件和其... 详细信息

基于PVsyst软件优化设计户用独立光伏发电系统,模拟系统运行性能。系统能量利用率为69.2%,用户需求满足率为94.3%,设计的独立光伏发电系统整体性能表现良好。为了提高系统设计的可靠性、效率、精度,工程技术人员应该利用PVsyst软件和其他模拟软件作为光伏系统设计和优化的辅助工具。

关键词：光伏发电 PVsyst 优化设计

Inhibition effect of small interfering RNA of connective tissue growth factor on the expression of vascular endothelial growth factor and connective tissue growth factor in cultured human peritoneal mesothelial cells

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Chinese Medical Journal 2007年第3期120卷 231-236页

作者： LIU Fu-you xiao Li peng you-ming DUAN Shao-bin LIU Hong LIU Ying-hong LING Gui-hui YUAN Fang CHEN Jun-xiang FU xiao ZHU Jian-lian Division of Nephrology Second Affiliated Xiangya Hospital Central South University Changsha 410002 China

Background The peritoneum response to peritoneal dialysis can lead to fibrosis. The transforming growth factor β1 （TGF-β1 ） plays a key role in regulating tissue repair and remodelling after injury. Connective tissue growth factor （CTGF）, a downstream mediator of TGF-β1 inducing fibrosis, has been implicated in peritoneal fibrosis. Vascular endothelial growth factor （VEGF） plays a key role in angiogenesis that can hasten peritoneal fibrosis. In this study, we investigated the effect of small interfering RNA （siRNA） of CTGF by pRETRO-SUPER （PRS） retrovirus vector on the expression of CTGF and VEGF in human peritoneal mesothelial cells. Methods Retrovirus producing CTGF siRNA were constructed from the inverted oligonucleotides and transferred into packaging cell line PT67 with lipofectamine, and the virus supernatant was used to infect human peritoneal mesothelial cell （HPMC）. The cells were divided into seven groups： low glucose DMEM, low glucose DMEM ＋ TGF-β1 5 ng/ml, low glucose DMEM ＋ TGF-β1 5 ng/ml ＋ PRS-CTGF-siRNA1-4 and low glucose DMEM ＋ TGF-β1 5 ng/ml ＋ PRS. The expression of CTGF and VEGF were measured by semiquantitative RT-PCR and Western blot. Results Low levels of CTGF and VEGF were detected in confluent HPMCs. Following stimulation with TGF-β1 , the levels of CTGF and VEGF were significantly upregulated （P〈0.01）. Introduction of PRS-CTGF-siRNA1-4 resulted in the significant reduction of CTGF mRNA and protein, and VEGF mRNA （P〈0.01）, especially in groups PRS-CTGF-siRNA, and PRS-CTGF-siRNA4. The introduction of PRS void vector did not have these effects （P〉0.05）. Conclusions The expression of CTGF siRNA mediated by PRS retrovirus vector can effectively reduce the level of CTGF and VEGF induced by TGF-β1 in cultured HPMCs. This study may provide potential therapeutic strategies to prevent the peritoneal fibrosis.

关键词： peritonealfibrosis connective tissue growth factor vascular endothelial growth factor,RNA, small interfering

Graphene/Ag2ZnSnSe4诱导p-n结薄膜太阳电池数值模拟

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物理学报 2021年第1期70卷 371-377页

作者：肖友鹏王怀平李刚龙东华理工大学核技术应用教育部工程研究中心南昌330013 东华理工大学机械与电子工程学院南昌330013

银锌锡硒(Ag2ZnSnSe4)是一种禁带宽度为1.4 eV的n型半导体材料.本文提出一种由n型Ag2ZnSnSe4与石墨烯(Graphene)组成的Graphene/Ag2ZnSnSe4诱导p-n结薄膜太阳电池,并借助wxAMPS软件对电池的物理机理和性能影响因素进行模拟研究.模拟结... 详细信息

银锌锡硒(Ag2ZnSnSe4)是一种禁带宽度为1.4 eV的n型半导体材料.本文提出一种由n型Ag2ZnSnSe4与石墨烯(Graphene)组成的Graphene/Ag2ZnSnSe4诱导p-n结薄膜太阳电池,并借助wxAMPS软件对电池的物理机理和性能影响因素进行模拟研究.模拟结果表明,高功函数的石墨烯与n型Ag2ZnSnSe4半导体接触时,Ag2ZnSnSe4吸收层的前端能带向上弯曲,在n型Ag2ZnSnSe4吸收层表面诱导形成p型Ag2ZnSnSe4反型层,p型Ag2ZnSnSe4和n型Ag2ZnSnSe4组成p-n同质结.模拟发现石墨烯和背接触的功函数会影响载流子的分离、输运和收集,严重影响器件性能,石墨烯功函数达到5.5 eV,背接触功函数不高于4.4 eV,都有利于提高器件性能.Ag2ZnSnSe4吸收层的掺杂浓度主要影响器件的短路电流,而Ag2ZnSnSe4吸收层的体内缺陷对器件整体性能产生影响.在石墨烯和背接触功函数分别为5.5和3.8 eV,Ag2ZnSnSe4吸收层的掺杂浓度和缺陷密度分别为1016和1014 cm–3时,Graphene/Ag2ZnSnSe4诱导p-n结薄膜太阳电池能够取得高达23.42%的效率.这些模拟结果为设计新型高效低成本太阳电池提供了思路和物理阐释.

关键词：石墨烯银锌锡硒诱导p-n 结薄膜太阳电池

The FAST Galactic Plane Pulsar Snapshot *** of 76 Galactic Rotating Radio Transients and the Enigma of RRATs

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Research in Astronomy and Astrophysics 2023年第10期23卷 1-70页

作者： D.J.Zhou J.L.Han Jun Xu Chen Wang P.F.Wang Tao Wang Wei-Cong Jing Xue Chen Yi Yan Wei-QiSu Heng-Qian Gan peng Jiang Jing-Hai Sun Hong-Guang Wang Na Wang Shuang-Qiang Wang Ren-Xin Xu xiao-peng you National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy University of Chinese Academy of SciencesBeijing 100049China Department of Astronomy School of Physics and Materials ScienceGuangzhou UniversityGuangzhou 510006China National Astronomical Data Center Great Bay AreaGuangzhou 510006China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China Key Laboratory of Radio Astronomy Chinese Academy of SciencesNanjing 210008China Department of Astronomy Peking UniversityBeijing 100871China School of Physical Science and Technology Southwest UniversityChongqing 400715China

We have carried out the Galactic Plane Pulsar Snapshot(GPPS)survey by using the Five-hundred-meter Aperture Spherical radio Telescope(FAST),the most sensitive systematic pulsar survey in the Galactic *** addition to more than 500 pulsars already discovered through normal periodical search,we report here the discovery of 76 new transient radio sources with sporadic strong pulses,detected by using the newly developed module for a sensitive single-pulse *** small DM values suggest that they all are Galactic rotating radio transients(RRATs).They show different properties in the follow-up *** radio pulses have been detected from 26 transient radio sources but no periods can be found due to a limited small number of pulses from all FAST *** followup observations show that 16 transient sources are newly identified as being the prototypes of RRATs with a period already determined from more detected sporadic pulses,and 10 sources are extremely nulling pulsars,and 24 sources are weak pulsars with sparse strong *** the other hand,48 previously known RRATs have been detected by the FAST,either during verification observations for the GPPS survey or through targeted observations of applied normal FAST *** for one RRAT with four pulses detected in a session of 5-minute observation and four RRATs with only one pulse detected in a session,sensitive FAST observations reveal that 43 RRATs are just generally weak pulsars with sporadic strong pulses or simply very nulling pulsars,so that the previously known RRATs always have an extreme emission state together with a normal hardly detectable weak emission *** is echoed by the two normal pulsars J1938+2213 and J1946+1449 with occasional brightening *** strong pulses of RRATs are very outstanding in the energy distribution,their polarization angle variations follow the polarization angle curve of the averaged normal pulse profile,suggesting that the predominant s

关键词： (stars:)pulsars:general surveys methods:data analysis

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硅异质结太阳电池的物理机制和优化设计

物理学报 2017年第10期66卷 309-318页

作者：肖友鹏王涛魏秀琴周浪南昌大学光伏研究院/材料科学与工程学院南昌330031

硅异质结太阳电池是一种由非晶硅薄膜层沉积于晶硅吸收层构成的高效低成本的光伏器件,是一种具有大面积规模化生产潜力的光伏产品.异质结界面钝化品质、发射极的掺杂浓度和厚度以及透明导电层的功函数是影响硅异质结太阳电池性能的主要... 详细信息

硅异质结太阳电池是一种由非晶硅薄膜层沉积于晶硅吸收层构成的高效低成本的光伏器件,是一种具有大面积规模化生产潜力的光伏产品.异质结界面钝化品质、发射极的掺杂浓度和厚度以及透明导电层的功函数是影响硅异质结太阳电池性能的主要因素.针对这些影响因素已经有大量的研究工作在全世界范围内展开,并且有诸多研究小组提出了器件效率限制因素背后的物理机制.洞悉物理机制可为今后优化设计高性能的器件提供准则.因此及时总结硅异质结太阳电池的物理机制和优化设计非常必要.本文主要讨论了晶硅表面钝化、发射极掺杂层和透明导电层之间的功函数失配以及由此形成的肖特基势垒;讨论了屏蔽由功函数失配引起的能带弯曲所需的特征长度,即屏蔽长度;介绍了硅异质结太阳电池优化设计的数值模拟和实践;总结了硅异质结太阳电池的研究现状和发展前景.

关键词：硅异质结太阳电池物理机制优化设计

Electrochemical conversion of methane to bridge the gap in the artificial carbon cycle

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Journal of Energy Chemistry 2025年第1期100卷 286-308页

作者： Yuhao peng Yuefeng Song Ihar Razanau Juanxiu xiao Wei xiao Di Hu Guoxiong Wang College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University State Key Laboratory of Catalysis Dalian National Laboratory for Clean Energy iChEM (Collaborative Innovation Center of Chemistry for Energy Materials) Dalian Institute of Chemical Physics Chinese Academy of Sciences Laboratory of Physical-Chemical Technologies SSPA Scientific and Practical Materials Research Centre of NAS of Belarus State Key Laboratory of Marine Resources Utilization in South China Sea Collaborative Innovation Center of Marine Science and Technology School of Marine Science and Engineering Hainan University Department of Chemical and Environmental Engineering University of Nottingham Ningbo China

Methane, an abundant one-carbon（C1） resource, is extensively used in the industrial production of vital fuels and value-added chemicals. However, current industrial methane conversion technologies are energy-and carbon-intensive, mainly due to the high activation energy required to break the inert C–H bond, low selectivity, and problematic side reactions, including CO2emissions and coke deposition. Electrochemical conversion of methane（ECM） using intermittent renewable energy offers an attractive solution, due to its modular reactor design and operational flexibility across a broad spectrum of temperatures and pressures. This review emphasizes conversion pathways of methane in various reaction systems, highlighting the significance and advantages of ECM in facilitating a sustainable artificial carbon cycle. This work provides a comprehensive overview of conventional methane activation mechanisms and delineates the complete pathways of methane conversion in electrolysis contexts. Based on surface/interface chemistry, this work systematically analyzes proposed reaction pathways and corresponding strategies to enhance ECM efficiency towards various target products, including syngas, hydrocarbons, oxygenates, and advanced carbon materials. The discussion also encompasses opportunities and challenges for the ECM process, including insights into ECM pathways, rational electrocatalyst design, establishment of benchmarking protocols, electrolyte engineering, enhancement of CH4conversion rates, and minimization of CO2emission.

关键词： Activation energy