實驗中使用紅色磷光發光二極體作為光子源，並根據實驗結果證明光子源的表現對於元件發光效率有很大的影響，實驗研究發現在室溫下intra-cavity pumping架構的電激發偏極子元件可以達到一定的發光效率約4%的EQE、6.8mW/cm2的光強與170meV的拉比分裂。此一結果，可進一步提供未來電激發偏極子雷射發展之基礎與重要參考。 ;In this thesis, an electrically pumped organic polariton device embedded with a red phosphorescent organic light-emitting diode (OLED) as light source based on intra-cavity pumping structure is developed and its external quantum efficiency studied.
Intra-cavity pumping is a kind of resonant pumping mechanism in a micro-cavity through an external voltage applied to excite the energy state of the polariton. Comparing with non-resonant pumping, the structure of the intra-cavity pumping performs better in reducing the energy loss in the process of polariton scattering and improve the luminous efficiency of polariton devices. The key feature of the intra-cavity pumping is to add a high absorption organic layer in the resonant cavity to trap polariton, and a suitable broadband light source layer, e.g. OLED, to generate photons as excitation light source. How to optimize the luminous efficiency in this composition of the polariton layer and organic photon source structure through various design parameters of this type of devices still remains a challenge
In the thesis, we use red phosphorescent OLED as the photon source coupled with DEDOC as high absorption polariton source. From our experimental results, it is found that the performance of the photon source has impact on luminous efficiency on the device. The study shows that this kind of strong coupling device can achieve external quantum efficiency (EQE) about 4%, light intensity 6.8mW / cm^2 and rabi-splitting of 170 meV. The result can provide a foundation for future reference of improvement.
