| abstract |
An organic photovoltaic cell which comprises an anode, a cathode, and an organic active layer provided between the anode and the cathode. The organic active layer comprises a first electron-donor compound, a second electron-donor compound and an electron-acceptor compound, and the difference between HOMO (highest occupied molecular orbital) energy level of the first electron-donor compound and HOMO (highest occupied molecular orbital) energy level of the second electron-donor compound is 0.20 eV or less. The organic photovoltaic cell has high photovoltaic efficiency. |