| 초록 |
The power conversion efficiencies of organic solar cells are not yet high enough for these to be commercialized, although organic solar cell is an attractive candidate for providing cheap, clean, and renewable energy. In order to optimize the power conversion efficiency of organic photovoltaics device, it is important to understand the distributions of charge density and electric field in the device under various operating conditions and the dependency of power conversion efficiency on the morphology of active layer. Computer simulations can be used for predicting the performance of polymer solar cells as a function of structure variation of active layer. In particular, a drift-diffusion model can capture the transient behavior of electron, hole and exiton concentrations in devices. In this study, photovoltaic properties of devices with different morphologies and different architectures were evaluated by using a drift-diffusion model, from which an optimum morphology can be determined. |
