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A crosslinked polymer as dopant-free hole-transport material for efficient n-i-p type perovskite solar cells 被引量:1
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作者 Linqin Wang Fuguo Zhang +10 位作者 Tianqi Liu Wei Zhang Yuanyuan Li Bin Cai Lanlan He Yu Guo Xichuan Yang Bo Xu James M.Gardner Lars Kloo Licheng Sun 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第4期211-218,共8页
A new crosslinked polymer,called P65,with appropriate photo-electrochemical,opto-electronic,and thermal properties,has been designed and synthesized as an efficient,dopant-free,hole-transport material(HTM)for n-i-p ty... A new crosslinked polymer,called P65,with appropriate photo-electrochemical,opto-electronic,and thermal properties,has been designed and synthesized as an efficient,dopant-free,hole-transport material(HTM)for n-i-p type planar perovskite solar cells(PSCs).P65 is obtained from a low-cost and easily synthesized spiro[fluorene-9,90-xanthene]-30,60-diol(SFX-OH)-based monomer X65 through a freeradical polymerization reaction.The combination of a three-dimensional(3 D)SFX core unit,holetransport methoxydiphenylamine group,and crosslinked polyvinyl network provides P65 with good solubility and excellent film-forming properties.By employing P65 as a dopant-free hole-transport layer in conventional n-i-p type PSCs,a power conversion efficiency(PCE)of up to 17.7%is achieved.To the best of our knowledge,this is the first time a 3 D,crosslinked,polymeric dopant-free HTM has been reported for use in conventional n-i-p type PSCs.This study provides a new strategy for the future development of a 3 D crosslinked polymeric dopant-free HTM with a simple synthetic route and low-cost for commercial,large-scale applications in future PSCs. 展开更多
关键词 Perovskite solar cell Hole-transport material dopant-free Crosslinked polymer Spiro[fluorene-9 9’-xanthene](SFX)
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Phenylfluorenamine-functionalized poly(N-vinylcarbazole)s as dopant-free polymer hole-transporting materials for inverted quasi-2D perovskite solar cells 被引量:1
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作者 Zhengwu Pan Han Gao +11 位作者 Yingying Yang Qin Zou Darui Peng Pinghui Yang Jiangli Cai Jin Qian Jiewei Li Chengrong Yin Nana Wang Renzhi Li Jianpu Wang Wei Huang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第6期123-131,I0004,共10页
In order to improve the efficiency and stability of inverted three-dimensional(3D) or quasi-2D perovskite solar cells(PSCs) for future commercialization, exploring high efficient dopant-free polymer holetransporting m... In order to improve the efficiency and stability of inverted three-dimensional(3D) or quasi-2D perovskite solar cells(PSCs) for future commercialization, exploring high efficient dopant-free polymer holetransporting materials(HTMs) is still desired and meaningful. One simple and efficient way to achieve high performance dopant-free HTMs is to synthesize novel non-conjugated side-chain polymers via rational molecular design. In this work, N-(4-methoxyphenyl)-9,9-dimethyl-9H-fluoren-2-amine(FMeNPh) groups are introduced into the poly(N-vinylcarbazole)(PVK) side chains to afford two nonconjugated polymers PVCz-DFMeNPh and PVCz-FMeNPh as dopant-free HTMs in inverted quasi-2D PSCs. Benefited from the flexible properties of polyethylene backbone and excellent optoelectronic natures of FMeNPh side-chain groups, PVCz-DFMeNPh with more FMeNPh units exhibited excellent thermal stability, well-matched energy levels and improved charge mobility as compared to PTAA and PVCzFMeNPh. Moreover, the morphologies investigation of quasi-2D perovskite on PVCz-DFMeNPh shows more compact and homogeneous perovskite films than those on PTAA and PVCz-FMeNPh. As a result,the dopant-free PVCz-DFMeNPh based inverted quasi-2D PSCs deliver power conversion efficiency(PCE) up to 18.44% as well as negligible hysteresis and favorable long-term stability, which represents as excellent performance reported to date for inverted quasi-2D PSCs. The results demonstrate the great potentials of constructing non-conjugated side-chain polymer HTMs based on phenylfluorenamine-func tionalized PVK for the development of high efficient and stable inverted 3D or quasi-2D PSCs. 展开更多
关键词 Phenylfluorenamine Non-conjugated polymers dopant-free Hole-transporting materials Quasi-2D perovskite solar cells
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Highly stable perovskite solar cells with a novel Ni-based metal organic complex as dopant-free hole-transporting material
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作者 Tai Wu Linqin Wang +6 位作者 Rongjun Zhao Rongshan Zhuang Kanghong Zhao Gaoyuan Liu Jing Huang Licheng Sun Yong Hua 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第2期312-318,共7页
Hole-transporting material(HTM)plays a paramount role in enhancing the photovltaic performance of perovskite solar cells(PSCs).Currently,the vast majority of these HTMs employed in PSCs are organic small molecules and... Hole-transporting material(HTM)plays a paramount role in enhancing the photovltaic performance of perovskite solar cells(PSCs).Currently,the vast majority of these HTMs employed in PSCs are organic small molecules and polymers,yet the use of organic metal complexes in PSCs applications remains less explored.To date,most of reported HTMs require additional chemical additives(e.g.Li-TFSI,t-TBP)towards high performance,however,the introduction of additives decrease the PSCs device stability.Herein,an organic metal complex(Ni-TPA)is first developed as a dopant-free HTM applied in PSCs for its facile synthesis and efficient hole extract/transfer ability.Consequently,the dopant-free Ni-TPAbased device achieves a champion efficiency of 17.89%,which is superior to that of pristine Spiro-OMeTAD(14.25%).Furthermore,we introduce a double HTM layer with a graded energy bandgap containing a Ni-TPA layer and a CuSCN layer into PSCs,the non-encapsulated PSCs based on the Ni-TPA/CuSCN layers affords impressive efficiency up to 20.39%and maintains 96%of the initial PCE after 1000 h at a relative humidity around 40%.The results have demonstrated that metal organic complexes represent a great promise for designing new dopant-free HTMs towards highly stable PSCs. 展开更多
关键词 Perovskite solar cell Hole transporting material Organic metal complex dopant-free
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One-Pot Synthesis of Tetraarylpyrrolo[3,2-b]pyrrole Dopant-Free Hole-Transport Materials for Inverted Perovskite Solar Cells
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作者 Liang-sheng Duan Quan-ping Wu +4 位作者 Yuan-yuan Xu Hui Wang Zhe Sun Yu Chen Song Xue 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2021年第2期217-226,I0002,共11页
Four organic smallmolecule hole transport materials(D41, D42,D43 and D44) of tetraarylpyrrolo[3,2-b]pyrroles were prepared. They can be used without doping in the manufacture of the inverted planar perovskite solar ce... Four organic smallmolecule hole transport materials(D41, D42,D43 and D44) of tetraarylpyrrolo[3,2-b]pyrroles were prepared. They can be used without doping in the manufacture of the inverted planar perovskite solar cells. Tetraarylpyrrolo[3,2-b]pyrroles are accessible for one-pot synthesis.D42, D43 and D44 possess acceptor-π-donor-π-acceptor structure, on which the aryl bearing substitutes of cyan, fluorine and trifluoromethyl, respectively. Instead, the aryl moiety of D41 is in presence of methyl with a donor-π-donor-π-donor structure. The different substitutes significantly affected their molecular surface charge distribution and thin-film morphology, attributing to the electron-rich properties of fused pyrrole ring. The size of perovskite crystalline growth particles is affected by different molecular structures,and the electron-withdrawing cyan group of D42 is most conducive to the formation of large perovskite grains. The D42 fabricated devices with power conversion efficiency of17.3% and retained 55% of the initial photoelectric conversion efficiency after 22 days in dark condition. The pyrrolo[3,2-b]pyrrole is efficient electron-donating moiety for hole transporting materials to form good substrate in producing perovskite thin film. 展开更多
关键词 Pyrrole[3 2-b]pyrrole Hole-transporting materials Organic small molecules dopant-free Perovskite solar cells
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Low-cost dopant-free fluoranthene-based branched hole transporting materials for efficient and stable n-i-p perovskite solar cells
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作者 Xinyu Yu Fei Wu +3 位作者 Xianglang Sun Linna Zhu Baoyu Xia Zhong'an Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第10期187-193,共7页
It has been widely recognized that hole transporting materials(HTMs)play a key role in the rapid progress of perovskite solar cells(PVSCs).However,common organic HTMs such as spiro-OMe TAD not only suffer from high sy... It has been widely recognized that hole transporting materials(HTMs)play a key role in the rapid progress of perovskite solar cells(PVSCs).However,common organic HTMs such as spiro-OMe TAD not only suffer from high synthetic costs,but also usually require the additional chemical doping process to improve their hole transport ability,which unfortunately induces the terrible stability issue.Therefore,it is urgent to develop low-cost dopant-free HTMs for efficient and stable PVSCs.In this work,we have successfully developed a new class of efficient dopant-free fluoranthene-based HTMs(TPF1–5)with quite low lab synthetic costs by combining donor-acceptor and branched structure designs.The detailed structure-property study revealed that tuning the twisted arms at different substitution sites would regulate the intermolecular interactions and film-forming ability,thereby significantly affecting the performance of the HTMs.By applying these HTMs in conventional PVSCs,the dopant-free TPF1-based devices not only achieved the best efficiency of 21.76%,which is comparable to that of the doped spiro-OMeTAD control devices,but also showed much better operational stability,which maintained over 87%of the initial efficiency under maximum power point tracking after 1038 h. 展开更多
关键词 Perovskite solar cells Holetransporting materials dopant-free FLUORANTHENE LOW-COST
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Recent Progresses on Dopant-Free Organic Hole Transport Materials toward Efficient and Stable Perovskite Solar Cells
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作者 Gang Xie Jintao Chen +8 位作者 Huiyu Li Jianxin Yu Haoran Yin Zhiping Wang Yaoyao Huang Chuizheng Feng Yang Pan Aihui Liang Yiwang Chen 《Chinese Journal of Chemistry》 SCIE CAS CSCD 2023年第22期3133-3166,共34页
As the third generation new battery,the power conversion efficiency(PCE)of metal halide perovskite solar cells(PsCs)has increased from 3.8%in 2009 to 25.8%currently certified,which fully shows that they have great res... As the third generation new battery,the power conversion efficiency(PCE)of metal halide perovskite solar cells(PsCs)has increased from 3.8%in 2009 to 25.8%currently certified,which fully shows that they have great research value and development prospect.As one of the main components of high-efficiency PSCs,hole transport materials(HTMs)play an important role in extracting and transporting holes and inhibiting charge recombination.However,commonly used HTMs require doping,and the hygroscopicity and corrosiveness of the dopants will destroy the stability of PsCs and hinder their commercialization.Therefore,it is of great significance to develop dopant-free HTMs. 展开更多
关键词 Organic hole transport materials dopant-free Perovskite solar cells EFFICIENT STABLE
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Engineering of dendritic dopant-free hole transport molecules:enabling ultrahigh fill factor in perovskite solar cells with optimized dendron construction 被引量:5
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作者 Wei Chen Yang Wang +13 位作者 Bin Liu Yajun Gao Ziang Wu Yongqiang Shi Yumin Tang Kun Yang Yujie Zhang Weipeng Sun Xiyuan Feng Frédéric Laquai Han Young Woo Aleksandra B.Djurisic Xugang Guo Zhubing He 《Science China Chemistry》 SCIE EI CAS CSCD 2021年第1期41-51,共11页
Developing dopant-free hole-transporting materials(HTMs)for high-performance perovskite solar cells(PVSCs)has been a very active research topic in recent years since HTMs play a critical role in optimizing interfacial... Developing dopant-free hole-transporting materials(HTMs)for high-performance perovskite solar cells(PVSCs)has been a very active research topic in recent years since HTMs play a critical role in optimizing interfacial charge carrier kinetics and in turn determining device performance.Here,a novel dendritic engineering strategy is first utilized to design HTMs with a D-A type molecular framework,and diphenylamine and/or carbazole is selected as the building block for constructing dendrons.All HTMs show good thermal stability and excellent film morphology,and the key optoelectronic properties could be fine-tuned by varying the dendron structure.Among them,MPA-Cz-BTI and MCz-Cz-BTI exhibit an improved interfacial contact with the perovskite active layer,and non-radiative recombination loss and charge transport loss can be effectively suppressed.Consequently,high power conversion efficiencies(PCEs)of 20.8%and 21.35%are achieved for MPA-Cz-BTI and MCz-Cz-BTI based devices,respectively,accompanied by excellent long-term storage stability.More encouragingly,ultrahigh fill factors of 85.2%and 83.5%are recorded for both devices,which are among the highest values reported to date.This work demonstrates the great potential of dendritic materials as a new type of dopant-free HTMs for high-performance PVSCs with excellent FF. 展开更多
关键词 dendritic molecules hole-transporting materials dopant-free ultrahigh fill factor perovskite solar cells
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Hydrogen-Bonded Dopant-Free Hole Transport Material Enables Efficient and Stable Inverted Perovskite Solar Cells 被引量:3
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作者 Rui Li Chongwen Li +9 位作者 Maning Liu Paola Vivo Meng Zheng Zhicheng Dai Jingbo Zhan Benlin He Haiyan Li Wenjun Yang Zhongmin Zhou Haichang Zhang 《CCS Chemistry》 CAS 2022年第9期3084-3094,共11页
Although many dopant-free hole transport materials(HTMs)for perovskite solar cells(PSCs)have been investigated in the literature,novel and useful molecular designs for high-performance HTMs are still needed.In this wo... Although many dopant-free hole transport materials(HTMs)for perovskite solar cells(PSCs)have been investigated in the literature,novel and useful molecular designs for high-performance HTMs are still needed.In this work,a hydrogen-bonding association system(NH⋯CO)between amide and carbonyl is introduced into the pure HTM layer. 展开更多
关键词 hydrogen bonding dopant-free hole transport material inverted perovskite solar cell high efficiency stability
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Recent advances in the design of dopant-free hole transporting materials for highly efficient perovskite solar cells 被引量:1
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作者 Xianglang Sun Dongbing Zhao Zhong'an Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2018年第2期219-231,共13页
Continuous success has been achieved for solution-processed inorganic-organic hybrid perovskite solar cells(PVSCs) in the past several years, in which organic charge transporting materials play an important role. At... Continuous success has been achieved for solution-processed inorganic-organic hybrid perovskite solar cells(PVSCs) in the past several years, in which organic charge transporting materials play an important role. At present, most of the commonly used hole-transporting materials(HTMs) such as spiro-OMeTAD derivatives for PVSCs require additional chemical doping process to ensure sufficient conductivity and shift the Fermi level towards the HOMO level for efficient hole transport and collection. However, this doping process not only increases the complexity and cost of device fabrication, but also decreases the device stability. Thus development of efficient dopant-free HTMs for PVSCs is highly desirable and remains as a major challenge in this field. In this review, we will summarize the recent advances in the molecular design of dopant-free HTMs for PVSCs. 展开更多
关键词 Perovskite solar cells Hole transporting materials dopant-free D-A structure Star-shape
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钙钛矿太阳能电池中无掺杂聚合物空穴传输材料研究进展
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作者 程霞飞 计文希 张龙贵 《石油化工》 CAS CSCD 北大核心 2024年第2期268-277,共10页
基于传统空穴传输材料(HTM)的钙钛矿太阳能电池(PSC)已经实现了超过25%的能量转换效率,然而这些HTM通常需要添加吸湿性掺杂剂来实现高迁移率和可加工性,从而降低了器件稳定性。为解决该问题,无掺杂HTM受到广泛关注。总结了近年来用于高... 基于传统空穴传输材料(HTM)的钙钛矿太阳能电池(PSC)已经实现了超过25%的能量转换效率,然而这些HTM通常需要添加吸湿性掺杂剂来实现高迁移率和可加工性,从而降低了器件稳定性。为解决该问题,无掺杂HTM受到广泛关注。总结了近年来用于高效PSC的无掺杂聚合物HTM的结构和性能,并分析了其中的构效关系,提出了高效无掺杂聚合物HTM的结构设计原理,并展望了未来的发展趋势。 展开更多
关键词 钙钛矿太阳能电池 无掺杂聚合物空穴传输材料 能量转换效率 结构-性能关系
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无掺杂空穴传输材料在n-i-p型钙钛矿太阳能电池中的应用研究进展
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作者 陈浩天 王学林 +2 位作者 姚璐 何智超 甄红宇 《福建师范大学学报(自然科学版)》 CAS 北大核心 2024年第5期52-62,共11页
钙钛矿太阳能电池(perovskite solar cells,PVSCs)因长期稳定性差和制造成本高难以实现工业化生产。其制备中最常用的空穴传输材料(hole-transporting materials,HTMs)为2,2′,7,7′-四[N,N-二(4-甲氧基苯基)氨基]-9,9′-螺二芴,需一定... 钙钛矿太阳能电池(perovskite solar cells,PVSCs)因长期稳定性差和制造成本高难以实现工业化生产。其制备中最常用的空穴传输材料(hole-transporting materials,HTMs)为2,2′,7,7′-四[N,N-二(4-甲氧基苯基)氨基]-9,9′-螺二芴,需一定量吸湿添加剂以实现高效的空穴提取,导致对水敏感的钙钛矿层受到破坏。无掺杂HTMs避免了吸湿添加剂的使用,且成本低、合成步骤简单。综述了应用于n-i-p型PVSCs的YT5、M7-TFSI、P3HT、PBDB-Cz等高效率无掺杂有机小分子以及聚合物HTMs,提出了理想HTMs在器件性能、分子结构、合成条件、经济成本等方面的设计原则,并展望了无掺杂HTMs在PVSCs商业化过程中的应用前景。 展开更多
关键词 钙钛矿太阳能电池 空穴传输材料 无掺杂 聚合物 有机 结构工程 分子设计
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硅异质结太阳电池的TiC_(x)O_(y)电子选择性接触研究
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作者 孙彪 丁阳 +3 位作者 黄志平 陈静伟 韦德远 许颖 《太阳能学报》 EI CAS CSCD 北大核心 2023年第7期141-146,共6页
报道一种新型的免掺杂电子传输材料——TiC_(x)O_(y),具有非晶相为主少量晶化相的混合相结构,约4.1 eV的低功函数和2.63 eV的宽带隙,可实现对电子的零势垒传输和对空穴的高势垒(1.64 eV)阻挡;TiC_(x)O_(y)/n型硅异质接触可获得17.74 mΩ... 报道一种新型的免掺杂电子传输材料——TiC_(x)O_(y),具有非晶相为主少量晶化相的混合相结构,约4.1 eV的低功函数和2.63 eV的宽带隙,可实现对电子的零势垒传输和对空穴的高势垒(1.64 eV)阻挡;TiC_(x)O_(y)/n型硅异质接触可获得17.74 mΩ·cm2的低接触电阻率,可实现对电子的选择性输运功能。TiC_(x)O_(y)薄膜用作全背面n型硅异质结电池的电子传输层,可大幅提高电池的开路电压和填充因子,最优电池的绝对效率提高3%。 展开更多
关键词 太阳电池 硅异质结 免掺杂 电子选择性接触
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氯化铁氧化掺杂的聚苯胺纳米纤维团簇 被引量:16
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作者 丁杭军 朱长进 +1 位作者 周智明 万梅香 《高分子学报》 SCIE CAS CSCD 北大核心 2007年第5期462-466,共5页
没有外加质子酸的条件下,以氯化铁为氧化剂和掺杂剂,在界面体系中由苯胺(An)采用“无模板”的方法成功地制备了电导率为10-2~10-1S/cm的聚苯胺纳米纤维(d=20~30nm).实验证明FeCl3同时起到氧化剂和掺杂剂的双重作用,从而进一步简化了... 没有外加质子酸的条件下,以氯化铁为氧化剂和掺杂剂,在界面体系中由苯胺(An)采用“无模板”的方法成功地制备了电导率为10-2~10-1S/cm的聚苯胺纳米纤维(d=20~30nm).实验证明FeCl3同时起到氧化剂和掺杂剂的双重作用,从而进一步简化了导电聚苯胺纳米纤维的合成条件.与使用过硫酸铵为氧化剂的传统聚合方法相比,FeCl3较小的氧化/还原电位使产物具有较小的直径和较高的结晶性.同时发现聚苯胺的形貌和电导率均与[FeCl3]/[An]的比例有关.FTIR,UV-Vis,XRD结构表征证实所得的聚苯胺纳米纤维为掺杂态. 展开更多
关键词 聚苯胺 纳米纤维 氯化铁 无掺杂剂 无模板法
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水/离子液体界面聚合法制备聚苯胺微/纳米纤维 被引量:3
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作者 张志明 王立群 +2 位作者 于良民 魏长峰 李霞 《中国海洋大学学报(自然科学版)》 CAS CSCD 北大核心 2008年第5期786-790,共5页
没有外加质子酸的条件下,以过硫酸铵作氧化剂,水和离子液体作为两相,采用"界面聚合法"成功制备出导电聚苯胺纳米纤维(d=100~190 nm),界面体系所使用的溶剂都为绿色溶剂,对环境无污染,实现了对传统界面聚合的改进。发现[APS]/... 没有外加质子酸的条件下,以过硫酸铵作氧化剂,水和离子液体作为两相,采用"界面聚合法"成功制备出导电聚苯胺纳米纤维(d=100~190 nm),界面体系所使用的溶剂都为绿色溶剂,对环境无污染,实现了对传统界面聚合的改进。发现[APS]/[An]的比例,去离子水的加入以及搅拌时间对产物的形貌有重要影响。通过FTIR,UV-Vis,XRD进行了结构表征,证实所得的聚苯胺纳米纤维为掺杂态。 展开更多
关键词 聚苯胺 界面聚合 离子液体 无掺杂剂 微/纳米纤维
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纳米锑掺杂对回流焊Sn-3.0Ag-0.5Cu-xSb焊点界面IMC生长的影响机理 被引量:3
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作者 唐宇 潘英才 李国元 《焊接学报》 EI CAS CSCD 北大核心 2014年第1期95-100,117-118,共6页
研究了纳米锑掺杂对回流焊过程中Sn-3.0Ag-0.5Cu-xSb(x=0,0.2%,1.0%和2.0%)焊点界面金属间化合物(IMC)生长动力学的影响.借助扫描电镜(SEM)观察了焊点的微观结构,利用X射线能谱分析(EDX)及X射线衍射谱仪(XRD)确定了IMC的相和成分.结果表... 研究了纳米锑掺杂对回流焊过程中Sn-3.0Ag-0.5Cu-xSb(x=0,0.2%,1.0%和2.0%)焊点界面金属间化合物(IMC)生长动力学的影响.借助扫描电镜(SEM)观察了焊点的微观结构,利用X射线能谱分析(EDX)及X射线衍射谱仪(XRD)确定了IMC的相和成分.结果表明,部分纳米锑颗粒溶解在富锡相中形成SnSb二元相,部分纳米锑颗粒溶解在Ag3Sn相中形成Ag3Sb相,剩余部分沉降在界面Cu6Sn5金属间化合物层表面.随着纳米锑含量的增加,IMC厚度减小.当纳米锑的含量为1.0%时,IMC厚度最小.通过曲线拟合,确定出界面IMC层生长指数和扩散系数.结果表明,IMC层生长指数和扩散系数均随着纳米锑含量的增加而减小.当纳米锑的含量为1.0%,IMC层生长指数和扩散系数均有最小值,分别为0.326和10.31×10-10cm2/s.由热力学相图和吸附理论可知,Sn,Sb元素之间易形成SnSb化合物,引起Sn元素的活性、Cu-Sn金属间化合物形成的驱动力和界面自由能下降,从而导致Cu6Sn5金属间化合物生长速率下降,抑制IMC生长. 展开更多
关键词 回流焊 纳米掺杂 无铅焊料 金属间化合物
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化学氧化聚合制备微/纳米结构聚苯胺研究进展 被引量:4
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作者 李瑜 郑建龙 井新利 《化工新型材料》 CAS CSCD 北大核心 2009年第11期18-21,77,共5页
近年来多种见诸报道的新颖聚苯胺(PANI)微/纳米结构及其制备途径,可大体归为:主要控制了苯胺化学氧化聚合中聚合产物成核、生长过程或对聚合反应施加了影响。主要从聚合产物的生长和团聚、苯胺化学氧化聚合所用氧化剂和掺杂剂三方面归... 近年来多种见诸报道的新颖聚苯胺(PANI)微/纳米结构及其制备途径,可大体归为:主要控制了苯胺化学氧化聚合中聚合产物成核、生长过程或对聚合反应施加了影响。主要从聚合产物的生长和团聚、苯胺化学氧化聚合所用氧化剂和掺杂剂三方面归纳了制备微/纳米结构PANI的反应条件及其影响因素。 展开更多
关键词 聚苯胺 纳米结构 无模板合成 氧化剂 掺杂剂
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Si-Ti-B掺杂金刚石/硬质合金复合体的性能 被引量:3
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作者 殷声 文涛 赖和怡 《北京科技大学学报》 EI CAS CSCD 北大核心 1991年第5期442-446,共5页
金刚石粒度和掺杂量两因素对Si-Ti-B掺杂金刚石/硬质合金复合体的金刚石层的抗弯强度和耐磨性的综合影响,可以归结为平均自由程与机械性能的关系。在强度(或耐磨性)与平均自由程的关系曲线中,存在最大值。对于低掺杂量材料,强度随平均... 金刚石粒度和掺杂量两因素对Si-Ti-B掺杂金刚石/硬质合金复合体的金刚石层的抗弯强度和耐磨性的综合影响,可以归结为平均自由程与机械性能的关系。在强度(或耐磨性)与平均自由程的关系曲线中,存在最大值。对于低掺杂量材料,强度随平均自由程(粘结相层厚度)的减少而降低。对于高掺杂量材料,强度随粘结相层厚度的增大而下降。Si-Ti-B掺杂烧结金刚石的耐热性高于钴粘结金刚石。 展开更多
关键词 金刚石 掺杂 硬质合金 复合体
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纳米TiO_2掺杂贵金属Pt抑制蓝藻的生长 被引量:6
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作者 尹海川 柳清菊 林强 《功能材料》 EI CAS CSCD 北大核心 2005年第12期1934-1937,共4页
制备并研究了纳米TiO2和Pt掺杂纳米TiO2对蓝藻生长的影响。结果表明,在太阳光照射下,Pt掺杂纳米TiO2能够破坏蓝藻藻囊;与纳米TiO2相比,Pt掺杂纳米TiO2能够更有效地使蓝藻内叶绿素含量、光合速率和呼吸速率以及超氧化物岐化酶(SOD)活性降... 制备并研究了纳米TiO2和Pt掺杂纳米TiO2对蓝藻生长的影响。结果表明,在太阳光照射下,Pt掺杂纳米TiO2能够破坏蓝藻藻囊;与纳米TiO2相比,Pt掺杂纳米TiO2能够更有效地使蓝藻内叶绿素含量、光合速率和呼吸速率以及超氧化物岐化酶(SOD)活性降低,超氧自由基增多;当Pt掺杂量为1%时,掺Pt纳米TiO2对蓝藻的抑制效果最好。 展开更多
关键词 Pt掺杂纳米TiO2 蓝藻抑制 SOD 超氧自由基 叶绿素
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金属氧化物多层膜晶体硅太阳电池的背场研究 被引量:1
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作者 林文杰 吴伟梁 +3 位作者 包杰 刘宗涛 梁宗存 沈辉 《太阳能学报》 EI CAS CSCD 北大核心 2019年第1期62-67,共6页
在n-Si与金属电极之间插入电子选择性材料Ca和Cs_2CO_3、LiF_x,可有效降低接触电阻和界面复合,该文研究Ca和Cs_2CO_3、LiF_x作为背场在氧化钨金属多层膜(WAW)/n-Si太阳电池中对电池性能和稳定性的影响。3种电子选择性材料中,2 nm的LiF_... 在n-Si与金属电极之间插入电子选择性材料Ca和Cs_2CO_3、LiF_x,可有效降低接触电阻和界面复合,该文研究Ca和Cs_2CO_3、LiF_x作为背场在氧化钨金属多层膜(WAW)/n-Si太阳电池中对电池性能和稳定性的影响。3种电子选择性材料中,2 nm的LiF_x对电池转换效率的提升最高,稳定性最好。对WAW/n-Si/LiF_x太阳电池R_s的各部分组成进行提取和分析,表明LiF_x/n-Si的接触电阻和LiF_x/Ag接触电阻仅占总串联电阻的0.2%,背场工艺得到最佳的优化。将LiF_x做为背场应用于氧化钒金属多层膜背接触晶体硅(MLBC)太阳电池中,达到19.02%的转换效率,而且用环氧树脂封装的MLBC太阳电池放置在空气中表现出极好的稳定性。 展开更多
关键词 晶体硅太阳电池 异质结 金属氧化物 多层膜 背场 无掺杂 背接触
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不同施主掺杂对BaTiO_3-Bi_(0.5)Na_(0.5)TiO_3-CaTiO_3陶瓷电学性能的影响 被引量:2
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作者 冷森林 杨琴芳 +1 位作者 龙禹 宋谋胜 《广东化工》 CAS 2016年第19期23-24,共2页
以BaCO_3,Na_2CO_3,TiO_2,Bi_2O_3,Y_2O_3,Nb_2O_5,La_2O_3为原材料,在氩气气氛中采取固相反应法合成新型高温无铅(95-x)mol%BaTiO_3-xmol%Bi_(0.5)Na_(0.5)TiO_3-5mol%CaTiO_3((95-x)BT-x BNT-5CT,x=8,15)PTCR(Positive Temperature Co... 以BaCO_3,Na_2CO_3,TiO_2,Bi_2O_3,Y_2O_3,Nb_2O_5,La_2O_3为原材料,在氩气气氛中采取固相反应法合成新型高温无铅(95-x)mol%BaTiO_3-xmol%Bi_(0.5)Na_(0.5)TiO_3-5mol%CaTiO_3((95-x)BT-x BNT-5CT,x=8,15)PTCR(Positive Temperature Coefficient of Resistance)陶瓷。研究不同施主(La,Y,Nb)掺杂对高温无铅(95-x)BT-x BNT-5CT材料的PTCR电学性能的影响。实验结果表明不同施主掺杂的BT-BNT-CT样品都有明显的正温度系数电阻效应,即PTC效应,其中Y和Nb掺杂的样品的整体性能最好。同时还研究了BNT含量分别为8%和15%对材料电学性能和居里温度的影响,实验结果得出,BNT的含量越高,材料的居里温度越高,但材料的半导化越困难。 展开更多
关键词 施主掺杂 高温 无铅 电学性能
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