| 摘要 |
PURPOSE:To improve light absorption rate in an optically active layer by using light multiple reflection from a rear electrode by laminating an electron acceptive organic layer and an electron donative organic layer to be rectified and bonded thereto between a light transmission front electrode and the rear electrode having light reflecting capacity, and further providing an organic layer having different main light absorption wavelength band from the acceptive or donative organic layer on the rear electrode side from the continuous two layers. CONSTITUTION:A laminate of an electron acceptive organic layer and an electron donative organic layer 1 for forming an optically active layer is included between a transparent electrode and a rear electrode having a light reflecting capacity, and an electron donative organic layer 2 having different essential light absorption band from that of the layer 1 is provided on a back surface electrode side. With this structure, JSC is particularly improved as compared with a configuration of the mere laminate of the acceptive layer 1. Further, the layer 1 has an optimum range of the JSC in a thick region for sufficiently transmitting a light with respect to the rise of the JSC, and the higher the light reflectivity of the rear electrode is, the higher of JSC is. |
