Electrical scanning probe microscopy of an integrated blocking layer.
Electrical scanning probe microscopy of an integrated blocking layer.
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集成阻挡层的电扫描探针显微镜。
DOI：
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发表时间：
2010
影响因子：
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通讯作者：
J. Gutmann
中科院分区：
文献类型：
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作者：
S. Weber;M. Memesa;R. Berger;H. Butt;J. Gutmann
扫描探针显微镜上进行了集成的阻挡层系统开发的混合有机太阳能电池。采用溶胶-凝胶法制备了二氧化钛与两亲性三嵌段共聚物（（PEO）MA-PDMS-MA（PEO））的纳米复合材料。等离子体处理和退火后的30-100 nm厚的旋铸膜的颗粒状结构与一个典型的二氧化钛颗粒直径为20 nm. Conductive扫描力显微镜显示，在几乎每个颗粒的表面上有一个增加的导电性相比，平均值。晶粒和电导率的相关性表明，二氧化钛颗粒形成互连路径通过膜。对于这些途径的电阻率，我们发现，尖端样品和样品电极电阻率的影响占主导地位。此外，导电扫描力显微镜显示非导电结构归因于热处理。原始样品一侧和等离子体处理加退火样品另一侧的开尔文探针显微镜显示，如对于无定形二氧化钛到无定形二氧化钛的转变所预期的，功函数存在偏移（0.8 +/-0.2eV）。
Scanning probe microscopy was performed on an integrated blocking layer system developed for hybrid organic solar cells. A nanocomposite consisting of titania and an amphiphilic triblock copolymer ((PEO)MA-PDMS-MA(PEO)) was prepared by sol-gel chemistry. After plasma treatment and annealing of a spin casted film of 30-100 nm thickness a granular structure with a typical titania grain diameter of 20 nm was found. Conductive scanning force microscopy revealed that on top of almost every grain on the surface there is an increased conductivity compared to the average value. The correlation of grains and conductivity indicated that titania particles formed interconnecting paths through the film. For the resistivity of these pathways we found that effects of tip-sample and sample-electrode resistivity dominate. Additionally, conductive scanning force microscopy revealed non-conducting structures attributed to the thermal treatment. Kelvin probe microscopy of pristine samples on one side and plasma treated plus annealed samples on the other side showed that there is a shift in work function (0.8 +/- 0.2 eV) as expected for the transition of amorphous to anatase titania.