The Application Of Hybrid Tamm Plasmon-Polariton/Microcavity Mode Hybridized State In Polymer Solar Cell

Compared with traditional solar cell, the thickness of the active layer of organic solar cell was thinner. Therefore, it had light weight, low cost and other advantages,and was concerned and studied widely. However, thinning of the active layer may have impact on optical performance of the device, i.e. limiting the absorption efficiency of the device to the incident light. To solve the problem, besides exploring new materials, it needed a reasonable optical design further, i.e. to study the light distribution in the device and introduce optical confinement mechanism to improve the efficiency of the device. This had significant meaning to scale-up and industrialization of organic solar cells. This paper developed a study on light absorption efficiency of organic solar cells, and studied the optical confinement mechanism on improving light absorption efficiency theoretically and experimentally.The specific study achievements are as the following:(1) Theoretically, the study introduced microcavity mode and Tamm plasmon-polariton in the organic solar cells to compare the enhancement effect of the two light absorption performance. The calculation discovers two optical confinement mechanisms have comparable enhancement effects on flat device.(2) Theoretically and experimentally, the study introduced microcavity mode and Tamm plasmon-polariton in the organic solar cells to expand the absorption bandwidth of the device. Specifically, photonic crystal structure was added outside of the device. Tamm plasmon-polariton could be activated at the metal electrode and photonic crystal interface, and it could be coupled with the microcavity mode inside of the device strongly. A new kind of hybridized mode, hybrid Tammplasmon-polariton/microcavity mode, was generated. This kind of hybridized mode could improve the absorption bandwidth effectively. The experimental results show that the power conversion efficiency of the device with the new mechanism is about32% higher than the efficiency of traditional microcavity mode device.