| 摘要 |
PURPOSE:To provide an injection light emitting element which can emit light without using laser beam as an excitation source. CONSTITUTION:Porous silicon 7 of a first conductive type is formed on a surface of a single crystal silicon substrate 1, while a space in the porous silicon 7 is filled and fixed by an SiO2 film 9 by means of CVD method. A window layer 10 of a second conductive type made of amorphous silicon or polysilicon is formed in contact with the porous silicon 7. A surface and a rear electrodes 11, 12 are placed on both sides of a pn junction formed by the porous silicon 7 and the window layer 10. Then with voltage applied between the electrodes, injection of minority carriers occur at the pn junction so that recombination of the carriers occurs at the pn junction to have light emitted and transmitted through the window layer 10. |
