Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 20, Issue 46, Pages 14971-14975Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201404169
Keywords
mesoporous materials; organic electronics; organic-inorganic hybrid materials; periodic mesoporous organosilica; phthalocyanines
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Funding
- Deutsche Forschungsgemeinschaft [SFB 486]
- LMUexcellent program
- Nanosystems Initiative Munich (NIM cluster)
- SolTech network (Bavaria)
- China Scholarship Council (CSC)
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Periodic mesoporous organosilica (PMO) materials offer a strategy to position molecular semiconductors within a highly defined, porous network. We developed thin films of a new semiconducting zinc phthalocyanine-bridged PMO exhibiting a face-centered orthorhombic pore structure with an average pore diameter of 11nm. The exceptional degree of order achieved with this PMO enabled us to create thin films consisting of a single porous domain throughout their entire thickness, thus providing maximal accessibility for subsequent incorporation of a complementary phase. The phthalocyanine building blocks inside the pore walls were found to be well-aggregated, enabling electronic conductivity and extending the light-harvesting capabilities to the near IR region. Ordered 3D heterojunctions capable of promoting photo-induced charge transfer were constructed by impregnation of the PMO with a fullerene derivative. When integrated into a photovoltaic device, the infiltrated PMO is capable of producing a high open-circuit voltage and a considerable photocurrent, which represents a significant step towards potential applications of PMOs in optoelectronics.
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