Optical logic operation based on polymer Langmuir-Blodgett-film assembly
Optical logic operation based on polymer Langmuir-Blodgett-film assembly
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DOI：
10.1002/anie.200250767
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发表时间：
2003-01-01
影响因子：
16.6
通讯作者：
Miyashita, T
中科院分区：
文献类型：
--
作者：
Matsui, J;Mitsuishi, M;Miyashita, T
安吉街2273号国际化学版2003，42，2272-2275 www. angewandte。org 2003 Wiley-VCH Verlag GmbH & Co. KGaA，魏因海姆lyte.首先用N2吹扫溶液30分钟以除去氧气。使用500-W氙灯和500-W深UV灯作为光源，并且使用干涉滤光片（300 nm和380 nm）来获得单色光。用功率计测量基板表面处的照射光强度（对于300 nm为0.5mW cm ↑ [2]，对于380 nm为1.4mW cm ↑ [2]）。图4显示了聚合物LB膜组件的光电流响应。在300 nm处菲层的选择性光激发的情况下，菲和二硝基苯单元之间的层间电荷转移产生了近70 pA，并且380 nm处蒽层的选择性光激发也以类似的方式产生了约70 pA。另一方面，两个发色团层的激发产生约190 pA光电流。这比通过选择性光激发获得的光电流的总和（140 pA）大1.4倍。这种非线性响应表明，在双激发条件下，层不仅作为电荷产生层，而且作为电荷传输层。尽管这些光电流很小，但通过重复测量证实了重现性（图4第二次运行）。此外，实现了2.7倍的高和低状态之间的差异。
2273 Angew. Chem. Int. Ed. 2003, 42, 2272–2275 www. angewandte. org 2003 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim lyte. The solution was initially purged with N2 for 30 min to remove oxygen. A 500-W xenon lamp and a 500-W deep UV lamp were used as the light source, and the interference filters (300 nm and 380 nm) were used to obtain monochromatic light. The irradiation light intensity at the substrate surface was measured with a power meter (0.5 mWcmÀ2 for 300 nm and 1.4 mW cmÀ2 for 380nm). Figure4 shows the photocurrent response of the polymer LB-film assembly. In the case of selective photoexcitation of the phenanthrene layer at 300 nm, almost 70 pA was generated by the interlayer charge transfer between phenanthrene and dinitrobenzene unit and also the selective photoexcitation of the anthracene layer at 380 nm produced approximately 70 pA by a similar manner. On the other hand, the excitation of both chromophore layers produced approximately 190 pA photocurrent. This is 1.4-times larger than the sum of the photocurrent obtained by selective photoexcitation (140 pA). This nonlinear response indicates that in the both-excitation condition, the layers are working not only as charge-generating layers but also as charge-transporting layers. Although these photocurrents were small, the reproducibility was confirmed by repeat measurements (Figure 4 second run). Furthermore, a difference between high and low states of a factor of 2.7 was achieved.