Auras Florian, Li Yan, Löbermann Florian, Döblinger Markus, Schuster Jörg, Peter Laurence M, Trauner Dirk, Bein Thomas
Department of Chemistry and Center for Nanoscience (CeNS), University of Munich (LMU), Butenandtstraße 5-13, 81377 Munich (Germany).
Chemistry. 2014 Nov 10;20(46):14971-5. doi: 10.1002/chem.201404169. Epub 2014 Oct 7.
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 11 nm. 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.
周期性介孔有机硅（PMO）材料提供了一种将分子半导体置于高度规整的多孔网络中的策略。我们开发了一种新型的半导体锌酞菁桥连PMO薄膜，其呈现出面心正交的孔结构，平均孔径为11纳米。这种PMO所实现的卓越有序程度使我们能够制备出在整个厚度范围内由单个多孔域组成的薄膜，从而为后续引入互补相提供了最大的可达性。发现孔壁内的酞菁结构单元聚集良好，实现了电子传导，并将光捕获能力扩展到近红外区域。通过用富勒烯衍生物浸渍PMO构建了能够促进光诱导电荷转移的有序三维异质结。当集成到光伏器件中时，渗透的PMO能够产生高开路电压和可观的光电流，这代表着PMO在光电子学领域潜在应用方面迈出了重要一步。
