ORGANIC PHOTOVOLTAIC DEVICE
In an organic power generating device that generates electricity by receiving light, a positive electrode and a negative electrode, at least one of which has transparency, a power generating layer which is formed of a mixture of an electron donor material and a hole donor material and generates electricity upon reception of light and disposed between the positive electrode and the negative electrode, and an inorganic layer which has a work function larger than that of the positive electrode and is disposed between the power generating layer and the positive electrode, are provided. Accordingly, an efficiency to take off electric charges from the power generating layer can be increased, so that the organic power generating device with high efficiency and long life can be obtained.
1 . An organic power generating device which generates electricity upon reception of light characterized by comprising:
a positive electrode and a negative electrode, at least one of which has transparency;
a power generating layer which is formed of a mixture of an electron donor material and a hole donor material and generates electricity upon reception of light and disposed between the positive electrode and the negative electrode; and
an inorganic layer which has a work function larger than that of the positive electrode and is disposed between the power generating layer and the positive electrode.
2 . The organic power generating device in accordance with claim 1 , wherein the layer of inorganic matter is formed to include an oxide of a transition metal selected among group 4, group 5, group 6 and group 7.
3 . The organic power generating device in accordance with claim 1 , wherein the layer of inorganic matter consists of only elements in group 14.
4 . The organic power generating device in accordance with claim 1 , wherein it is used in an organic solar cell or an organic photo-detector of a low light irradiation region equal to or smaller than 100 mW/cm 2 of light intensity.
5 . The organic power generating device in accordance with claim 2 , wherein it is used in an organic solar cell or an organic photo-detector of a low light irradiation region equal to or smaller than 100 mW/cm 2 of light intensity.
6 . The organic power generating device in accordance with claim 3 , wherein it is used in an organic solar cell or an organic photo-detector of a low light irradiation region equal to or smaller than 100 mW/cm 2 of light intensity.