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Identification and biochemical characterization of DC07090 as a novel potent small molecule inhibitor against human enterovirus 71 3C protease by structure-based virtual screening 期刊论文  OAI收割
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY, 2016, 卷号: 124, 页码: 981-991
作者:  
Ma, Guang-Hui;  Ye, Yan;  Zhang, Dan;  Xu, Xin;  Si, Pei
  |  收藏  |  浏览/下载:43/0  |  提交时间:2019/01/08
基于二噻吩并咔唑与苯并噻二唑的 D-A 型共轭聚合物的合成与表征 学位论文  OAI收割
硕士, 中国科学院长春应用化学研究所: 中国科学院研究生院, 2015
作者:  
荣梓清
收藏  |  浏览/下载:62/0  |  提交时间:2016/04/27
由于给体片段(D)和受体片段(A)间的电荷转移  D-A型共轭高分子通常具有较小的光学带隙  且分子偶极矩较大  分子间相互作用较强  利于获得高的载流子迁移率  因此  D-A型共轭聚合物是有机太阳能电池材料领域的研究热点。另一方面  稠环分子由于具有刚性平面的构型  重组能小等优点而被广泛引入D-A型共轭聚合物体系中。因此  本文以二噻吩并[2  3-b:7  6-b]咔唑(C1)和二噻吩并[3  2-b:6  7-b]咔唑(C2)两个稠环单元作为给体片段  苯并噻二唑(BT)单元作为受体片段合成了一系列D-A型共轭聚合物  并且对它们的光物理性质  电化学性质  载流子传输和光伏特性进行了系统研究  主要成果和创新点如下: (1)合成了基于二噻吩并咔唑和烷氧基取代的BT单元的两个聚合物P(BT-C1)和P(BT-C2)  它们均是无定形聚合物。 尽管P(BT-C1)和P(BT-C2)在分子结构上只有硫原子位置不同的差别  但两者在长波长和短波长范围表现出完全相反的相对吸收强度。 通过理论模拟可以发现  两个聚合物骨架构象完全不同  P(BT-C1)的骨架较为弯曲  而P(BT-C2)的骨架线性较好。因此  基于P(BT-C2)的有机薄膜晶体管(OTFT)的迁移率较高  达到5.4×10-3 cm2V-1s-1  而P(BT-C1)的OTFT迁移率较低  为1.9×10-3 cm2V-1s-1。 P(BT-C2)的HOMO能级比P(BT-C1)深0.2 eV左右  因此  基于P(BT-C2)的体异质结有机太阳能电池(OSC)器件的开路电压(Voc)明显高于P(BT-C1)  而P(BT-C1)与PC71BM共混薄膜相分离更加明显  导致P(BT-C1)的OSC器件的短路电流密度(Jsc)和填充因子(FF)较高  两个聚合物的能量转换效率(PCE)相差不多  均在5%左右。 (2)以C2为给体单元  BT和二氟代BT为受体单元  合成了两个共轭聚合物P(C6BT-C2)和P(C6BT2F-C2)。与P(BT-C2)相比  P(C6BT-C2)具有较高的热稳定性  HOMO能级升高  光谱红移。在BT单元上引入F原子后  聚合物的HOMO能级由P(C6BT-C2)的-5.00 eV降低到P(C6BT2F-C2)的-5.20 eV  同时帯隙变窄。 理论模拟发现两者的分子平面性比P(BT-C2)有很大改善  但分子骨架构象较为弯曲。基于P(C6BT-C2)与P(C6BT2F-C2)的OTFT器件在150 oC退火后载流子迁移率分别为4.8×10-3 和4.9×10-3 cm2V-1s-1 。由于与PC71BM共混薄膜的相分离不明显  基于P(C6BT-C2)与P(C6BT2F-C2)的OSC器件的Jsc和FF较低  PCE均小于2%。  
Characteristics of ZnMgO-based metal-semiconductor-metal photodetectors (EI CONFERENCE) 会议论文  OAI收割
International Symposium on Photoelectronic Detection and Imaging, ISPDI 2007: Photoelectronic Imaging and Detection, September 9, 2007 - September 12, 2007, Beijing, China
作者:  
Zhang J.;  Li B.;  Li B.;  Li B.;  Zhao Y.
收藏  |  浏览/下载:25/0  |  提交时间:2013/03/25
In recent years  ZnMgO semiconductor alloys  with a direct bandgap tunable between 3.37 eV and 7.8 eV  become one of the most suitable materials for the fabrication of ultraviolet detectors. In this paper  we have fabricated metal-semiconductor-metal photodetectors on 1-m thick Zn 0.8Mg0.2O films. The interdigital metal electrodes are 500 m long and 5 m wide with an interelectrode spacing 2 m  5 m and 10 m  respectively. Zn0.8Mg0.2O films were grown on quartz by ratio frequency magnetron sputtering at 500C. Dark current  spectral responsivity and pulse response were carried out for the devices with different finger pitches. All the photodetectors showed the peak responsivity at 330 nm and the ultraviolet-visible rejection ratio (R330 nm/R400 nm) is more than four orders of magnitude at 3 V bias. For the device with 2 m finger pitch  the detectivity was calculated as 4.21011 cm Hz 1/2/W at 330 nm. Furthermore  the transient response measurement for all devices revealed similar rise time of 10 ns. The 90%-10% fall times are 130 ns  170 ns and 230 ns for the devices with different finger pitches of 2 m  5 m and 10 m  respectively..  
Temperature-enhanced ultraviolet emission in ZnO thin film (EI CONFERENCE) 会议论文  OAI收割
Zhang Y. J.; Xu C. S.; Liu Y. C.; Liu Y. X.; Wang G. R.; Fan X. W.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
We have studied the structural and optical properties of ZnO thin films prepared by thermal oxidation of ZnS films deposited by plasma assisted electron-beam evaporation on Si(1 0 0) substrates. The transformation from zinc blende ZnS to hexagonal wurtzite ZnO is confirmed by Raman and X-ray diffraction (XRD) measurement. For the sample thermally oxidized at 600 C for 2 h  a novel UV emission peak Ix located at 3.22 eV (385 nm) has been observed. The temperature-dependent photoluminescence spectra show that the integrated intensity of Ix increases exponentially with increasing temperatures within the measuring temperature range  from 80 to 300 K  but the peak position remains nearly constant. We explain this behavior in terms of electron tunneling into the radiative recombination centers.  
1GeV/c广量程磁谱仪 期刊论文  OAI收割
高能物理与核物理, 1991, 期号: 4, 页码: 289-297
作者:  
毛振麟;  王子华;  张勤俭;  后晓江;  王功利
收藏  |  浏览/下载:45/0  |  提交时间:2015/12/07
200GeV/c的质子-核碰撞中产生粒子的多重数分布与能量亏损 期刊论文  OAI收割
高能物理与核物理, 1987, 期号: 12, 页码: 231-237
作者:  
刘波;  王英才
收藏  |  浏览/下载:32/0  |  提交时间:2015/12/10