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基于双层晶组的压电式四维力传感器静态特性分析与仿真
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作者 王浩宇 秦岚 +1 位作者 刘俊 刘京诚 《电工技术》 2011年第5期72-73,共2页
在现有压电式四维力传感器结构基础上,选用石英作为敏感元件,并根据不同切型石英的特点按特定方式进行排列组合,设计了双层晶组式传感器。通过有限元分析方法,对优化的压电式四维力传感器进行仿真,从而得到新型传感器力电转换效率、维... 在现有压电式四维力传感器结构基础上,选用石英作为敏感元件,并根据不同切型石英的特点按特定方式进行排列组合,设计了双层晶组式传感器。通过有限元分析方法,对优化的压电式四维力传感器进行仿真,从而得到新型传感器力电转换效率、维间干扰等静态特性指标,证明了该传感器能够有效提高测量的精度。 展开更多
关键词 有限元分析 力电转换效率 维间干扰 结构优化
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Graphdiyne oxide-accelerated charge carrier transfer and separation at the interface for efficient binary organic solar cells 被引量:1
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作者 Le Liu Yuanyuan Kan +9 位作者 Guangliu Ran Min Zhao Zhiyu Jia Siqi Chen Jianxiao Wang Hao Chen Chengjie Zhao Ke Gao Wenkai Zhang Tonggang Jiu 《Science China Materials》 SCIE EI CAS CSCD 2022年第10期2647-2656,共10页
Interfacial engineering for the regulation of the charge carrier dynamics in solar cells is a critical factor in the fabrication of high-efficiency devices.Based on the successful preparation of highly dispersible gra... Interfacial engineering for the regulation of the charge carrier dynamics in solar cells is a critical factor in the fabrication of high-efficiency devices.Based on the successful preparation of highly dispersible graphdiyne oxide(GDYO)with a large number of functional groups,we fabricated organic solar cells employing GDYO-modified poly(3,4-ethylenedioxythiophene)/poly(styrene sulfonate)(PEDOT:PSS)as hole transport materials.Results show that theπ±πinteraction between GDYO and PEDOT:PSS is beneficial to the formation of an optimized charge carrier transfer channel and improves the conductivity and charge carrier mobility in the hole transport layer.Moreover,the improved interfacial contact contributes to the suppression of charge carrier recombination and the elevation of charge carrier extraction between the hole transport layer and the active layer.More importantly,the occurrence of charge carrier separation benefits from the optimized morphology of the active layer,which efficiently improves the performance,as proven by the results of transient absorption measurements.Therefore,with the holistic management approach to the multiobjective optimization of the charge carrier dynamics,a photoelectric conversion efficiency of 17.5%(with the certified value of 17.2%)is obtained for binary organic solar cells.All of these results indicate the potential application of the functionalized graphdiyne in the field of organic optoelectronic devices. 展开更多
关键词 graphdiyne oxide hole transport layer charge carrier dynamics PEDOT:PSS organic solar cells
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Low band-gap benzodithiophene-thienothiophenecopolymers: the effect of dual two-dimensional substitutions on optoelectronic properties
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作者 Zhulin Liu Jiangman Sun +5 位作者 Yongxiang Zhu Peng Liu Lianjie Zhang Junwu Chen Fei Huang Yong Cao 《Science China Chemistry》 SCIE EI CAS CSCD 2015年第2期267-275,共9页
Two new conjugated copolymers, PBDT-T6-TTF and PBDT-T12-TTF, were derived from a novel 4-fluorobenzoyl thienothi- ophene (TTF). In addition, two types of benzodithiophene (BDT) units with 2,3-dihexylthienyl (T6)... Two new conjugated copolymers, PBDT-T6-TTF and PBDT-T12-TTF, were derived from a novel 4-fluorobenzoyl thienothi- ophene (TTF). In addition, two types of benzodithiophene (BDT) units with 2,3-dihexylthienyl (T6) and 2,3-didodecylthienyl (T12) substituents, respectively, were successfully synthesized. The effect of the dual two-dimensional (2D) substitutions of the building blocks upon the optoelectronic properties of the polymers was investigated. Generally, the two polymers exhibited good solubility and broad absorption, showing similar optical band gaps of ~1.53 eV. However, PBDT-T6-TTF with its shorter alkyl chain length possessed a larger extinction coefficient in thin solid film. The highest occupied molecular orbital (HOMO) level of PBDT-T6-TTF was located at -5.38 eV while that of PBDT-T12-TTF was at -5.51 eV. In space charge-limited- current (SCLC) measurement, PBDT-T6-TTF and PBDT-T12-TTF displayed respective hole mobilities of 3.0~10-~ and 1.6x10 5 cm2 V-1 s-l. In polymer solar cells, PBDT-T6-TTF and PBDT-T12-TTF showed respective power conversion efficiencies (PCEs) of 2.86% and 1.67%. When 1,8-diiodooctane (DIO) was used as the solvent additive, the PCE of PBDT-T6-TTF was remarkably elevated to 4.85%, but the use of DIO for the PBDT-T12-TTF-blend film resulted in a lower PCE of 0.91%. Atomic force microscopy (AFM) indicated that the superior efficiency of PBDT-T6-TTF with 3% DIO (v/v) should be related to the better continuous phase separation of the blend film. Nevertheless, the morphology of the PBDT-T12-TTF deteriorated when the 3% DIO (v/v) was added. Our results suggest that the alkyl-chain length on the 2D BDT units play an important role in determining the optoelectronic properties of dual 2D BDT-TT-based polymers. 展开更多
关键词 conjugated copolymers BENZODITHIOPHENE thienothiophene dual 2-dimentional substitutions alkyl side-chain length
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