Investigation of Charge Transfer Interactions in CdSe Nanorod P3HT/PMMA Blends by Optical Microscopy
Investigation of Charge Transfer Interactions in CdSe Nanorod P3HT/PMMA Blends by Optical Microscopy
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通过光学显微镜研究 CdSe 纳米棒 P3HT/PMMA 混合物中的电荷转移相互作用
DOI：
10.1021/jp207926v
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发表时间：
2012
影响因子：
3.7
通讯作者：
V. Chikán
中科院分区：
文献类型：
--
作者：
Santanu Roy;A. Aguirre;D. Higgins;V. Chikán
用广场荧光显微镜和单点时间瞬变分析研究了分散在聚甲基丙烯酸甲酯(PMMA)薄膜中的CdSe纳米棒和稀疏聚(3-己基噻吩基)(P3HT)。这些数据描述了纳米棒/P3HT薄膜的带边发光增强，这与P3HT静态电荷转移填充了CdSe表面陷阱是一致的。纳米棒的带边发光也被证明通过从P3HT到表面陷阱态的光激活(例如，动态)电荷转移来增强。在P3HT和PMMA薄膜中观察到的CdSe纳米棒闪烁行为的差异进一步证明了电荷转移在增强CdSe发光中所起的作用。
CdSe nanorods and dilute poly(3-hexylthiophene) (P3HT) dispersed in poly(methyl methacrylate) (PMMA) films are investigated by wide field fluorescence microscopy and by analysis of single-point time transients. The data depict enhanced band-edge luminescence from nanorod/P3HT films, consistent with filling of CdSe surface traps by static charge transfer from P3HT. Band-edge luminescence from the nanorods is also shown to be enhanced by photoactivated (e.g., dynamic) charge transfer from P3HT to surface trap states on the CdSe nanorods. The role played by charge transfer in enhanced CdSe luminescence is further demonstrated by differences observed in the CdSe nanorod blinking behavior in P3HT and PMMA films.