1. Interface Control for Quantum Dot- and Dye-Sensitized Solar Cells
  In the operation of quantum dot-sensitized solar cells (QDSCs) and dye-sensitizied solar cells (DSSCs), recombination of photoexcited electrons at various interfaces are major concerns to achieve improved power-conversion efficiencies. We explore the strategies to effectively suppress recombination processes via proper modifications on those interfaces.  Our interests also extend to utilizing plasmonic effects from metalic nanostructures, constructing tandem cell structures to enhance open-circuit voltages, and controlling surface morphologies of transparent conducting oxide (TCO) substrates or so.

2. Nanostructured Electrodes for Lithium Secondary Batteries
  We are working to design the next-generation energy-storage technology, imagining a world in which batteries for a variety of applications are designed from abundant, cheap, and safe electrode materials.  Our interests lie on the physical/chemical phenomena at the interface between the electrode and electrolyte, and we also aim to enhance the electrochemical properties by synthesizing controlled morphologies of nanostructures.

3. Catalytic Materials and Related Reactions for Fuel Cells
  Our research has been focused on designing the catalyst nanostructures for fuel cell, which is one of the promising energy-conversion systems due to their high-energy efficiency, zero emission, low-temperature operation, etc.  We aim to develop metal-semiconductor (or nanoporous insulator) nanocomposite catalysts for enhancing the onset potential and reducing the amount of Pt loading.

4. Photoluminescence of Nanomaterials
  Semiconductor nanoparticles with diameters in the range of 1 to 20 nm exhibit unique physical properties that give rise to many potential applications.  To further improve the luminescent quantum efficiency and photovoltaic power-conversion efficiency, surface passivation and surface plasmon are utilized with controlled nanostructures.

Summaries of Previous Researches in BP Group
- Synthesis and Growth Mechanisms of One-Dimensional Strontium-Hydroxyapatite Nanostructures
- Ag Nanoparticles Dispersed in Silica Matrix
- Nanostructured Platinum/Iron-Phosphate Thin-Film Electrodes for Methanol Oxidation
- The Effects of Ruthenium-Oxidation States on Ru Dissolution in PtRu Thin-Film Electrodes
- Dielectric Relaxation of ALD HfO2 Thin Films from 1 kHz to 5 GHz