Abstract:
The present invention relates to an organic and inorganic hybrid solar cell including a semiconductor layer with diamine derivatives and a manufacturing method thereof. The organic and inorganic hybrid solar cell is made of a first substrate; a first electrode formed on the first substrate; a semiconductor layer which is formed on the first electrode; a second substrate; and a second electrode which is formed on the second substrate to be faced with the first electrode. A dye and diamine derivatives are applied to the surface of the semiconductor layer. The present invention blocks electrons which are lost (recombined) to an electrolyte by applying the diamine derivatives on the surface of a titanium dioxide semiconductor compound with the composition including the electrolyte applied between the first and second electrodes. Therefore, the efficiency is improved. The semiconductor layer is effectively protected from the electrolyte because an area which can cover the surface of the semiconductor layer per unit molecule is large by using the diamine derivatives in which there are at least four functional groups (X1-X4) capable of interacting with a hydroxyl group formed on the surface of the semiconductor layer. The present invention does not require a high temperature plasticity process by using an insulating material having great blocking effect as the diamine derivatives instead of a metal oxide. The present invention applies the diamine derivatives on the surface of the semiconductor layer with a simple deposition process and improves the efficiency of a solar cell. [Reference numerals] (AA) First electrode (Cathode); (BB,FF) Recombination block layer; (CC,GG) Semiconductor layer; (DD) Light diffusion layer; (EE) First substrate; (HH) Scattering layer; (II) Electrolyte; (JJ) Diamine derivatives formed on the surface of the semiconductor layer and the scattering layer