| 초록 |
Organic photodiodes, (OPDs) based on organic semiconductors with high absorption coefficients for visible light, are emerging as potential candidates for replacing silicon photodiodes in image sensors, particularly due to the possibility of realizing a thin thickness and exclusion of color filters, both of which can contribute to a dramatically enhanced degree of integration for image sensors. To reailize such a goal, here we introduce some of recently developed new approaches of realizing color selective, thin film and high detectivity OPDs. The first approach is employing Schottky junction for exciton separation instead of conventional p-n heterojunction, so that the absorption spectrum of a single organic semiconductor can be fully reflected to the resulting detectivity spectrum of OPD. The second approach is introducing a new dual-function “etalon-electrode”, which can perform the function of electrode, and simultaneously the function of selective wavelength transparency. |
