TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Structure: The structural portion (3) consists at least of one-dimensional structure. The structural portion (1), preferably two or more, formed by growth accompanied by branch, is connected by chemical bond to the reference point (2) of the structural portion (3) on the basis of dangling bond of the structural portion (3). The structural portion (3) has carbon structure which is a structure of carbon nanotube. The structural portion (1) is formed as hierarchical branch in the form of tree, by stepwise growth of organic molecule. Preferred Properties: The structural portion (3) has electroconductivity. The structural portion (1) has a light absorptivity or luminosity, fractal property, and has electrical conductivity by pi-electron conjugate.    TECHNOLOGY FOCUS - ELECTRONICS - Preferred Component: The functional material comprises optoelectric transducers, photodetector, light emitting element, filter element and electrode. The solar battery elements are integrated or disposed in parallel and used as optoelectric transducer which picks out light energy absorbed in the structural portion (1) as electrical energy through the structural portion (3). The electrical energy is picked out by an electron or hole in the structural portion (3). The hole or electron remaining in the structural portion (1) is picked out through the electrode, and is picked out from multiple structural portions (3) opposing the structural portion (1). The fermi level of the structural portions (3) is mismatching and the boundary surfaces of the structural portion (3) produce internal electric field. The structural portions (3) consisting of carbon nanotube are doped with mutually different metal. The photodetector detects light of specific wavelength or wavelength range in the structural portion (1). The structural portion (3) produces electroconductivity by electrons and holes which are comprised by the diode structure. The diode structure becomes the light-emitting element by pouring an electron and a hole, and emits light in the structural portion (1). The light-emitting element is formed in a cavity and light-emitting wavelength is selected using laser. An ion or a molecule is conveyed in the structural portion (1) between exterior portions, and in the structural portion (3). The ion exchange or molecule exchange among the structural portions (3) is performed using filter element. The filter element has a multiple arrangement. The conduction in each branch of the structural portion (1) is by a line-crack to one-dimensional direction. The structural portion (1) has a structure where diffusion and relief to the direction orthogonal to the conduction direction are suppressed. The structural portions (3) are connected with wide gap semiconductor portion which further connects the structural portion (1). The functional material has p-i-n structure for isolating the electron-hole pair from the surface of the structural portion (1) by which optical pumping is carried out by connecting the structural portion (3) as p-type or n-type semiconductor structural portion through the wide gap semiconductor portion. The edges of structural portions (3) are connected to the multiple electrodes. The functional material exists in a solvent. A portion of electron-hole pair moves to the structural portion (3) and the other portion discharges in the solvent. The electrode exists in the edge portion of structural portion (3). A structural portion (3) has electron affinity and the other structural portion (3) has hole affinity, and hence a portion of electron-hole pair moves to the portion which has electron affinity and the other portion of electron-hole pair moves to the portion which as hole affinity.