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The characteristics of pentacene/perylene derivatives based organic solar cells are investigated in this thesis Donor and acceptor layers are pentacene and N N'-dioctyl-3 4 9 10-perylenetetracarboxylic diimide (PTCDI-2~13C) respectively Twelve organic solar cells with pentacene/PTCDI-2~13C heterojunctions were fabricated to study the influence of various alkylic perylene derivatives on the power conversion efficiency Under the sunlight simulator with AM1 5G filter and 100 mW/cm2 the solar cell of pentacene/PTCDI-7C heterojunction with cathode of Ag/Al bilayer has the best performance among the devices with pentacene/PTCDI-2~13C heterojunctions In PL spectrum analyses the pentacene/PTCDI-7C film had lower recombination rate than the other pentacene/PTCDI-2~13C films; therefore more excitons could reach the P/N junction and enhance short-circuit current Furthermore the PTCDI-7C film grown on the surface of penatcene was more matched than other PTCDI films analyzed by the PL peak shifts of 10 nm and 45 nm thick PTCDI-2~13C and images of atomic force microscope More lattice match between the films of pentacene and PTCDI resulted in fewer defects in P/N junction and more carries can reach electrodes Accordingly the power conversion efficiency approach 2% was obtained from the solar cell with the active layer of pentacene/PTCDI-7C

本研究探讨以五环素/骈苯衍生物异质接面太阳能电池之特性,利用pentacene作为电子施体有机材料,PTCDI -2C~13C作为电子受体有机材料,制作出异质接面为pentacene/ PTCDI-2C ~13C等12种有机太阳能电池,比较不同碳数的骈苯衍生物对於有机太阳能电池之光电转换效率之影响。在AM1 5G、100 mW/cm2的模拟太阳光下,以pentacene/PTCDI-7C异质接面太阳能电池具有短路电流9 882 mA/cm2、开路电压0 376 V、填充因数0 523及光电转换效率达1 945%,皆比其他pentacene/PTCDI-2C ~13C异质接面太阳能电池来的大。由薄膜分析可知PTCDI-7C在这12种太阳能电池中具有较低的电子电洞复合发光效率,可以让较多激子到达异质接面进行电荷分离,减少电子电洞对复合发光的机率;此外,由光激发萤光光谱之峰值位移配合原子力显微镜表面结构图,可以得知当PTCDI-7C成长在pentacene上时会顺著pentacene的结构成长薄膜,故较无缺陷产生在P/N接面处;而在其他结构下则无此现象产生,致使在pentacene/PTCDI-7C薄膜中的载子有较大的机会可以移动至电极,使光电流提高,进而使光电转换效率提高。

This study showed that the most important fitness indicator for Taiwan is the amount of physical activity, including time and intensity of participation. The first concern of government should be the increase in number of people participating in physical activity and to make exercise as part of life style. Increased amount of physical activity could reduce the risk for many chronic diseases. The yearly fitness test should focus on the amount of physical activity conducted, the socioeconomic information, and the baffler of engaging physical activity.

本研究的结果显示,当前我国最重要的课题应在於提升运动人口,培养国民运动习惯,最重要的体适能指标应为身体活动量,包括参与运动的时间和强度;增加身体活动量可降低各种慢性病罹患机率,每年的体适能检测应以调查民众身体活动量为主,并包含社会经济地位与参与身体活动的限制因素等资料,以作为制定政策的参考。

Several important concepts like expected and empirical risks, target and hypothesis spaces, and Bayes optimal solution are either introduced or revisited in the light of statistical learning theory.

由于实例学习法会牵涉到严密的机率架构问题,因此许多重要的观念,如预期和经验风险,标的与假设空间以及贝斯最佳解式将被介绍,或是以统计学的观点再次回顾。

Yet bear in mind that this still implies that you should be at ease with basic probability theory and calculus, and more importantly, you should be used to thinking in mathematical terms.

但是要记住这仍然意味着你应该要能轻易地运用机率的理论和微积分,而且更重要的是,你应该要习惯于用数学的术语思考。

After comparing the two type of tests,we came to some conclusions.The tests based on binomial test can be regarded as some kind of permutation tests under certain definition of "permutaton".If the tests are related to statistics,then whether they can be viewed as permutation tests depends on if the value of the probability,p,is known where p is the population parameter in the null hypothesis.For tests like Kolmogorov goodness-of-fit test,since the statistics is calculated based on empirical distribution function,hence no matter how we repermutate the observations,the order statistics is the same.This kind of tests can't be regarded as permutation tests.

我们得到的结论为:在一般的无母数检定中,如果检定与binomial test相关,基本上都可以视作排列检定的一种;与卡方检定相关的检定,基本上和p值已知或是未知有关,这个p值为原始假设下所要检定的母体机率值;其他检定如Kolmogorov goodness-of-fit test,由於统计量的值是根据empirical distribution function决定,而不论如何重新排列样本,其顺序统计量都不变,所以无法视为一种排列检定。

"Bisexuality immediately doubles your chances for a date on Saturday night."

"双性爱可以立刻让你周六晚上约会的机率加倍。"

It is obvious to see that bivariate copulas is a very useful tool for constructing bivariate distributions, especially when the marginal distributions are given of the same type of distribution such as bivariate exponential distribution and bivariate gamma distribution.

由回顾知道,经由二元机率合函数以建立二元分布是一项很有用的工具,尤其是边际分布为特定分布时,如边际分布为同类型时之二元指数、二元迦玛等等。

This leads to a reduced chance of heart blockage and reduces the risk of stroke.

这导致心脏病的机率降低阻塞,降低中风的风险。

Sleep deprivation decreases the odds of shedding blubber and keeping it off.

剥夺睡眠会减少脂肪脱落的机率甚至完全丧失脂肪脱落的能力。

Combining the idea of quantization and the semi-classical hydrogen model of Bohr, the structure of atom is described. Solving the Schrodinger equation, the deduced wave function is related to the probability of finding the electron in space.

经由波尔之半古典的氢原子模型,结合量子化的概念以解释原子结构,并引入薛丁格方程式所求得之波函数与电子之空间机率的关系。

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推荐网络例句

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国,慢性酒精中毒,肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题,你可以随时联系我。

Very pretty, but the airport looks more fascinating The other party wisecracked.

很漂亮,不过停机坪更迷人。那人俏皮地答道。