Yuki Tsuda

National Institute of Advanced Industrial Science and Technology · Research Institute of Electrochemical Energy

Copper(I) thiocyanate (CuSCN) is known as a wide bandgap p-type semiconductor and recently demonstrated its high ability as a hole-transporting material in perovskite solar cells and light emitting diodes. Its thin film is usually fabricated by simple solution coating and drying [1]. In fact, little is known for physical properties of CuSCN, such a...

We demonstrate an electrically-driven metal-dielectric photonic crystal emitter by fabricating a series of organic light emitting diode microcavities in a vertical stack. The states of the individual microcavities are shown to split into bands of hybridized photonic energy states through interaction with adjacent cavities. The propagating photonic...

Doping of transition metals to zinc oxide (ZnO) is of great interest for its functionalization as magnetic semiconductor and electrocatalyst. In this study, electrodeposition of metal organic framework (MOF) thin films, in which zinc and cobalt ions are bridged by terephthalic acid (TPA), was made possible by adding TPA to an O2-saturated aqueous s...

We have established electrochemical self-assembly (ESA) of inorganic / organic hybrid thin films in which the inorganic is CuSCN, known as a wide bandgap p-type semiconductor, whereas the organic is 4- N,N -dimethylamino-4’- N’ -methylstilbazolium chromophore (abbreviated as DAS ⁺ ) as its salt with tosylate (DAST) known to exhibit second-order non...

Copper(I) thiocyanate (CuSCN) is known as a wide bandgap p-type semiconductor and recently demonstrated its high ability as a hole-transporting material in thin film devices such as dye-sensitized and perovskite solar cells [1]. However, in fact little is known for its intrinsic physical properties such as bandgap, band positions, optical transpare...

Electrochemical self-assembly (ESA) of CuSCN/4-cyano-4’-( N’ -methyl)stilbazolium (CNS ⁺ ) hybrid thin films has been performed and analyzed in comparison with CuSCN/4-( N , N -dimethylamino)-4’-( N’ -methyl)stilbazolium (DAS ⁺ ) hybrid system. Due to the presence of strongly electron-withdrawing -CN group, CNS ⁺ has a much higher dipole moment tha...

We have found electrochemical self-assembly (ESA) of inorganic / organic hybrid thin films in which the inorganic is CuSCN, known as a wide bandgap p-type semiconductor, whereas the organic is 4- N,N -dimethylamino-4’- N’ -methylstilbazolium chromophore (abbreviated as DAS) as its salt with tosylate (DAST) known to exhibit second-order nonlinear op...

Electrochemically self-assembled (ESA) CuSCN/4-( N , N -dimethylamino)-4’-( N ’-methyl)stilbazolium (DAS) hybrid thin film was found to exhibit concerted photoluminescent (PL) property based on energy transfer from CuSCN to DAS [1]. The amount of co-precipitated DAS ( P DAS ) during ESA linearly increased on increasing DAS concentration ( C DAS ) i...

Whether they are inorganic or organic, the key words for creation of new functional materials should be (1) solution, (2) low temperature, and (3) rare-element-free for sustainable development. As a leading example, we explore electrochemical self-assembly (ESA) of inorganic / organic hybrid thin films. In addition to the interests to study evoluti...

Energy security and sustainability are the most important challenges of mankind for their survival towards the 22nd century. While renewable electricity by solar and wind has already become so cheap, technologies for its conversion to easily storable chemical energies are urgently needed. Electrocatalysts not dependent on noble metals therefore nee...

Hybrid thin films of crystalline CuSCN and 4-(N,N-dimethylamino)-4′-(N′-methyl)stilbazolium (DAS) in three distinctively different nanostructures were obtained by electrochemical self-assembly from a single pot containing all the chemical ingredients. Their optical properties for UV-vis-NIR absorption, photoluminescence (PL), and PL excitation spec...

Introduction: Combination of inorganic and organic materials offers unlimited new opportunities. While “composites” stands for their physical mixtures, “hybrids” and “inorganic/organic compounds” are especially interesting for their new functionalities, as they are achieved by self-organization due to “chemistry” among the constituents. We have est...

We have found electrochemical self-assembly (ESA) of inorganic / organic hybrid thin films in which the inorganic is CuSCN, known to be a wide bandgap p-type semiconductor, whereas the organic is 4- N , N -dimethylamino-4’- N ’-methylstilbazolium chromophore (abbreviated as DAS ⁺ ) as its salt with tosylate (DAST) is known to exhibit second-order n...

Metal organic flamework (MOF) is a class of inorganic / organic compound whose crystalline structure is made by bridging inorganic ions with organic ligands. Due to its open porous structure, special functionalities are anticipated in applications such as sensors, catalysis and batteries. Variation of MOFs is almost unlimited, not only by choice of...

Nine different organic dyes have been used for electrochemical self-assembly (ESA) of CuSCN/dye hybrid thin films. One of these dyes was added to the bath for cathodic electrodeposition of CuSCN, containing Cu²⁺ and SCN⁻ ions in ethanol. While anionic xanthene dyes having a carboxylic acid group were not loaded into the film, resulting in colorless...

Nanostructured inorganic–organic hybrid thin films of copper(I) thiocyanate (CuSCN) and 4-(N,N-dimethylamino)-4′-(N′-methyl)stilbazolium tosylate (DAST) were electrochemically self-assembled by adding DAST into methanolic bath containing Cu²⁺ and SCN⁻ ions. Loading of the stilbazolium organic chromophore (DAS⁺) increased linearly on increasing DAST...