Langmuir−Blodgett Films of Poly(3-hexylthiophene) Doped with the Endohedral Metallofullerene Dy@C82: Preparation, Characterization, and Application in Photoelectrochemical Cells
Langmuir−Blodgett Films of Poly(3-hexylthiophene) Doped with the Endohedral Metallofullerene Dy@C82: Preparation, Characterization, and Application in Photoelectrochemical Cells
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DOI：
10.1021/jp0375618
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发表时间：
2004-03
影响因子：
3.3
通讯作者：
Shangfeng Yang;L. Fan;Shihe Yang
中科院分区：
文献类型：
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作者：
Shangfeng Yang;L. Fan;Shihe Yang
我们已经成功地构建了基于掺杂Dy@C82的聚（3-己基噻吩）（P3 HT）的LB膜的光电化学（PEC）电池。该复合结构的特征在于Dy@C82与P3 HT的噻吩结构单元之间的相互作用，其在空气/水界面处呈侧边排列。在光电化学（PEC）电池中使用P3 HT-Dy@C82复合LB膜，阴极光电流显着增强，功率转换效率（ηe）和量子产率（Φ）分别比纯P3 HT电池高出16倍和9倍。这归因于P3 HT和Dy@C82之间的容易的光诱导电子转移，这也通过光致发光（PL）光谱表征揭示。最佳的PEC性能被发现与有序的薄膜结构所揭示的AFM测量。研究了电子受体、偏置电压、光强和层数等因素的影响。
We have successfully constructed photoelectrochemical (PEC) cells based on the Langmuir−Blodgett (LB) films of poly(3-hexylthiophene) (P3HT) doped with Dy@C82. The composite structure is featured by the interaction between Dy@C82 and the thiophene building blocks of P3HT, which take an edge-on arrangement at the air/water interface. The usage of the P3HT−Dy@C82 composite LB films in photoelectrochemical (PEC) cells yields a dramatic enhancement of the cathodic photocurrent, with the power-conversion efficiency (ηe) and quantum yield (Φ) being up to 16-fold and 9-fold higher, respectively, than those of pure P3HT cells. This is attributed to the facile photoinduced electron transfer between P3HT and Dy@C82, which is also revealed by photoluminescence (PL) spectroscopic characterization. The optimum PEC performance is found to be correlated with an ordered film structure as revealed by AFM measurements. The effects of the electron acceptor, bias voltage, light intensity, and number of layers have been studi...