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41.
基于有机-无机杂化卤化铅材料的钙钛矿太阳电池的转换效率在短短几年内已迅速突破22%,为未来能源问题的解决带来了曙光,同时也引起了高度重视.但紧随其后的商品化、产业化发展需求极大地增加了对绿色、无毒的高效无铅钙钛矿太阳电池进行研究和开发的重要性和紧迫性.为进一步加快环境友好型钙钛矿太阳电池的研发进度,对目前无铅和少铅钙钛矿太阳电池的发展现状进行了综述.着重讨论了替代元素种类及其浓度、制备工艺等对薄膜和电池性能的影响,以期对电池的工作机理、替代元素的作用机理有更加深刻的认识,为新型环保、高效的钙钛矿太阳电池的制备提供指导. 相似文献
42.
采用甚高频等离子体增强化学气相沉积(VHF-PECVD)技术在高功率密度和高压强条件下,通过改变硅烷浓度和气体总流量对薄膜沉积参数进行了两因素优化,最终在硅烷浓度为45%,气体总流量为100 sccm条件下,获得沉积速率142 nm/s,电导激活能047 eV的优质硅薄膜;同时,通过单因素优化制备出沉积速率为21 nm/s的微晶硅薄膜.利用晶粒间界势垒模型和费米能级统计偏移模型对薄膜的电学特性和传导行为分别进行了研究分析,同时初步分析了“后氧化”对薄膜电学性能的影响.
关键词:
μc-Si:H
甚高频等离子体增强化学气相沉积
高速沉积
电学特性 相似文献
43.
本统计苏州大学1978~1995期间学生死亡,退学,休学,共321例,其中因健康原因占59.19%,非健康原因占40.81%,并再分为1978~1986,1987~1995两个阶段统计,前一阶段健康原因占80.56%,后一阶段仅占41.81%,反映近几年心理,社会因素,学生个人行为不良等造成辍学的比例上升,内还列举因健康原因辍学的前三位病因是:传染病,精神疾患,恶性肿瘤,因非健康原因辍学的前三 相似文献
44.
The high deposition of microcrystalline silicon thin film by very high frequency plasma enhanced
chemical vapour deposition and the fabrication of solar cells
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This paper reports that the intrinsic microcrystalline silicon ($\mu
$c-Si:H) films are prepared with plasma enhanced chemical vapour
deposition from silane/hydrogen mixtures at 200\du\ with the aim to
increase the deposition rate. An increase of the deposition rate to
0.88\,nm/s is obtained by using a plasma excitation frequency of
75\,MHz. This increase is obtained by the combination of a higher
deposition pressure, an increased silane concentration, and higher
discharge powers. In addition, the transient behaviour, which can
decrease the film crystallinity, could be prevented by filling the
background gas with Hchemical vapour deposition,
plasma deposition, solar cells, crystallinity Program supported by the State Key
Development Program for Basic Research of China (Grant No
2006CB202601), and Basic Research Project of Henan Province in China
(Grant No 072300410140). 7280N, 7830G, 8115H This paper reports that the intrinsic microcrystalline silicon ($\mu
$c-Si:H) films are prepared with plasma enhanced chemical vapour
deposition from silane/hydrogen mixtures at 200\du\ with the aim to
increase the deposition rate. An increase of the deposition rate to
0.88\,nm/s is obtained by using a plasma excitation frequency of
75\,MHz. This increase is obtained by the combination of a higher
deposition pressure, an increased silane concentration, and higher
discharge powers. In addition, the transient behaviour, which can
decrease the film crystallinity, could be prevented by filling the
background gas with Hchemical vapour deposition,
plasma deposition, solar cells, crystallinity Program supported by the State Key
Development Program for Basic Research of China (Grant No
2006CB202601), and Basic Research Project of Henan Province in China
(Grant No 072300410140). 7280N, 7830G, 8115H This paper reports that the intrinsic microcrystalline silicon ($\mu
$c-Si:H) films are prepared with plasma enhanced chemical vapour
deposition from silane/hydrogen mixtures at 200\du\ with the aim to
increase the deposition rate. An increase of the deposition rate to
0.88\,nm/s is obtained by using a plasma excitation frequency of
75\,MHz. This increase is obtained by the combination of a higher
deposition pressure, an increased silane concentration, and higher
discharge powers. In addition, the transient behaviour, which can
decrease the film crystallinity, could be prevented by filling the
background gas with Hchemical vapour deposition,
plasma deposition, solar cells, crystallinity Program supported by the State Key
Development Program for Basic Research of China (Grant No
2006CB202601), and Basic Research Project of Henan Province in China
(Grant No 072300410140). 7280N, 7830G, 8115H This paper reports that the intrinsic microcrystalline silicon ($\mu
$c-Si:H) films are prepared with plasma enhanced chemical vapour
deposition from silane/hydrogen mixtures at 200\du\ with the aim to
increase the deposition rate. An increase of the deposition rate to
0.88\,nm/s is obtained by using a plasma excitation frequency of
75\,MHz. This increase is obtained by the combination of a higher
deposition pressure, an increased silane concentration, and higher
discharge powers. In addition, the transient behaviour, which can
decrease the film crystallinity, could be prevented by filling the
background gas with Hchemical vapour deposition,
plasma deposition, solar cells, crystallinity Program supported by the State Key
Development Program for Basic Research of China (Grant No
2006CB202601), and Basic Research Project of Henan Province in China
(Grant No 072300410140). 7280N, 7830G, 8115H This paper reports that the intrinsic microcrystalline silicon ($\mu
$c-Si:H) films are prepared with plasma enhanced chemical vapour
deposition from silane/hydrogen mixtures at 200\du\ with the aim to
increase the deposition rate. An increase of the deposition rate to
0.88\,nm/s is obtained by using a plasma excitation frequency of
75\,MHz. This increase is obtained by the combination of a higher
deposition pressure, an increased silane concentration, and higher
discharge powers. In addition, the transient behaviour, which can
decrease the film crystallinity, could be prevented by filling the
background gas with H$_{2}$ prior to plasma ignition, and selecting
proper discharging time after silane flow injection. Material
prepared under these conditions at a deposition rate of 0.78\,nm/s
maintains higher crystallinity and fine electronic properties. By
H-plasma treatment before i-layer deposition, single junction $\mu
$c-Si:H solar cells with 5.5{\%} efficiency are fabricated. 相似文献
45.
采用空间自相关分析法,以县域为研究单元,对2000~2012年徐州都市圈工业发展时空格局特征进行了分析.结果表明:徐州都市圈县域工业发展的相对差异呈波动性缩小之势,而各县域之间呈现正空间相关性且集聚态势有加强趋势,但空间集聚程度不高;该都市圈县域工业集聚程度呈以徐州市区为核心向外围降低的圈层分布格局,且近年来沿东陇海线向沿海延展的轴线发展格局初现,而南部、西部地区的工业边缘化现象明显.根据相邻县域间的关系,将徐州都市圈各县域分为扩散发展型、极化发展型、过渡发展型和落后均衡型. 相似文献
46.
在构建区域产业系统适应性评价模型的基础上,探讨1996~2012年江苏省产业系统适应性时空格局特征.结果表明:1996~2012年江苏省产业系统适应性总体呈增强趋势,但各区域差异较大;江苏省产业系统适应性、脆弱性和恢复力均呈现南高北低的空间格局;而敏感性则呈南北低中间高的"凸"字型格局.据此,将全省划分为4类区域,即高脆弱高适应型、高脆弱低适应型、低脆弱高适应型、低脆弱低适应型.降低脆弱性和敏感性,增强恢复力,是提高江苏省产业系统适应能力的主要路径. 相似文献
47.
方阵零特征值代数重数与秩之间的关系 总被引:1,自引:0,他引:1
在已知零特征值代数重数时,给出了矩阵零特征值代数重数与矩阵秩之间的内在必然联系,及其一般应用. 相似文献
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