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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。

Put the lavers on an bamboo curtain, and don't forget wipe some sesame oil on the surface of them.

饭绝不可以太软，这样包出来的很难成形。等饭冷一点的时候。

Esp., most of the paddy rice, straw, rice leaves, rice husks, timber components, saw dust, reed and reed basketwork, rope and various plant stems and leaves, fruits etc. were in bright colors; among the paddy rice remains, the embossed veins and palea on the surface of some rice husks were also as clear-cut as original, so it was with a small amount of whole rice that connected the straw and ears of rice; there were some deposits mixed by rice husks, straws and rice leaves etc. crossed in several small layers under Layer 3, some looked like current objects, people would have such illusion that these were just fallen down on earth yesterday upon uncovering and could hardly believe that they were from thousands of years ago.

特别是，如稻谷、稻杆、稻叶、谷壳、木构件、木屑、芦苇及其编织物、绳子，以及各种植物茎叶、果实等等，多数色泽新鲜；水稻类遗存中，有的谷壳表面的隆脉和稃毛也清晰如初，还有稻杆与稻穗连在一起的少量整株水稻；第3层下数小层相间夹杂的谷壳、稻杆和稻叶等的混合堆积物，有的如同现时之物，刚揭开时真还会有一种昨天刚倒掉时的错觉，几乎无法相信它们是数千年前的物品。

Gas on the surface of Betelgeuse is so far from the center of the star's gravity that the gravitational hold on it is weak and it can easily slip away.

该恒星表面的气体离其重心相当远，这样一来，上面的重力十分微弱，它就可以轻易逃脱。

When you are fishing, you must keep an eye on the bobber as it floats on the surface of the water.

钓鱼的时候要注意浮标在水面上漂浮的情形。

We can find from the research that the IR and XRD spectrogram shows the exists of H_3BO_3 on the surface of cellulose;there is H~+ released form the solution and the complexation proportion of the boric acid-glucose in the solution is 1:1, the boric acid-mannitol is 1:2 and the boric acid-N-methylglucamine is 1:2;and the half experienced mathematics model experiment on analyzing PH shows that the cellulose's adsorption of the boracic acid is mainly chemical adsorption with a proportion of 1:1 while physical adsorption with the H~+ released during the reaction plays a role as assistance.

研究结果表明，通过IR和XRD谱图分析，表明纤维素上吸附了H_3BO_3；硼酸和葡萄糖、甘露醇、N-甲基葡萄糖胺在水溶中络合比分别为1：1，1：2，1：2，同时溶液中有H~+释放出来；应用半经验数学模型分析pH值-浓度吸附实验，表明纤维素对硼酸主要以化学吸附为主吸附比为1：1，以物理吸附为辅，反应过程中释放出H~+。

RESULTS: SEM results showed that the fiber morphology of P(50/50) 6% nanofibers membrance was better and more uniform diameter distribution. Mechanic test indicated nanofibers membrance of P(50/50) had longer breaking elongation but smaller breaking stress than nanofibers membrance of P(75/25). Hydrophilicity of P(75/25) fibers was better. MTT results proved that 6% and 8% P(50/50) nanofibers could enhance the adhesion and proliferation of endothelial cells on the surface of materials, and the cells had the best spreading and attachment on the nanofibers.

结果：通过扫描电镜观察发现由质量分数为6%聚(50/50)制备的纤维膜具有更好的纤维形态，且直径分布均匀；拉伸力学测试显示由聚(50/50)制备的纤维膜比聚(75/25)具有更高的断裂伸长率，但断裂应力较低；细胞生物相容性实验表明猪髋动脉内皮细胞在质量分数为6%和8%聚(50/50)的纳米纤维膜上更能有效的黏附与增殖。

Boundary conditions on the surface of an airfoil are implemented by using their first-order expansions on the mean chord line.

提出了一种应用近似边界条件在固定的笛卡尔网格上求解非定常欧拉方程来解决气动弹性的方法。

Must ensure that the car has concentric outer circle with the machine tool spindle (Micrometer can be measured on the surface of the workpiece has been processed on the side of the bus and bus).

必须保证已车外圆与机床主轴同心（可用千分表测工件已加工表面的侧母线和上母线）。

However, many factories closed or moved away. Cleveland had severe financial problems in the nineteen sixties and seventies. In nineteen sixty-nine, the city became famous, but not in a good way. Cleveland's Cuyahoga River caught on fire because of industrial wastes on the surface of the river.

然而， 19世纪60、70年代，许多工厂倒闭或搬走了，克利夫兰市面临着很严重的财政问题。1969年，由于工厂把废弃物都扔到了 Cuyahoga 河上，克利夫兰的 Cuyahoga 河起火了，因此，这个城市变得家喻户晓。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。