Invited for this month′s cover is the group of Jong Hak Kim at Yonsei University in South Korea. The image shows how organized mesoporous SnO2 film plays a role in controlling light harvesting, electron transport and interfacial/internal resistance of dye-sensitized solar cells (DSSCs). The Full Paper itself is available at 10.1002/cssc.201301215
12Multi-functional organized mesoporous SnO2 (om-SnO2) film was prepared via sol-gel process using a cheap graft copolymer, poly(vinyl chloride)-graft-poly(oxyethylene methacrylate) (PVC-g-POEM), as a structure-directing agent. Our graft-copolymer-directed approach introduces a new and simple route toward the synthesis of well-organized metal oxide films as an alternative to a conventional block copolymer-based template.
What is the most significant result of this study?
An om-SnO2 film showed anti-reflective properties, a cascadal energy band gap, good interconnectivity, and a high electrical conductivity. The use of om-SnO2 film resulted in enhanced light harvesting, increased electron transport, reduced charge recombination, and decreased interfacial/internal resistance.
What future opportunities do you see?
This work provides a significant contribution to the development of organized mesoporous metal oxide films, as well as shedding new light on the structure–property relations in DSSCs. Also, the future opportunity raised by this work is that multi-functional organized mesoporous materials could be applied for water splitting, lithium batteries, electrochemical capacitors, and separation membranes.
This work was supported by the Korea Center for Artificial Photosynthesis (KCAP) (2009-0093883) and the Active Polymer Center for Pattern Integration (2007-0056091).