鈣鈦礦發光二極體有著優秀的發光效率，然而其中卻存在著嚴重的遲滯現象阻礙元件發展。本實驗室由實驗成果推測遲滯由元件中的離子移動所造成，而摻雜兩性離子氯化膽鹼能有效消除元件的遲滯，並大幅提升元件的發光效率。本論文目的為量化元件中的離子遷移現象，透過電容量測探討離子在元件內的分布，並由電容與溫度的相依關係計算出元件的啟動能，啟動能計算結果與理論計算數值相符，顯示溴離子是造成元件遲滯的主因，並證實氯化膽鹼能夠有效抑制離子遷移現象。

In our previous researches, we observed the unusual radiative phenomenon and hysteresis in perovskite devices which mainly were caused by ion migration. To proving that, we incorporated a small amount of choline chloride into perovskite precursor solution for passivating the defect on surface of the active layer. By this simple method, we are significantly improved the devices performance as well as inhibited the hysteresis phenomenon.
Furthermore, we used the transient ion drift measurement to calculate the activation energy of ion migration in perovskite LEDs via tau and capacitate variation. The activation energy value of our MAPbBr3 perovskite devices without choline chloride additive is around 90 meV which is very close to the reported activation energy for halide migration in MAPbBr3 published in elsewhere. Therefore, we definitely concluded that the abnormal behavior was observed in our MAPbBr3 LEDs is related to the migration of Br- anion. In additional, by incorporating the choline chloride, the activation energy is significantly increase which supporting for the suppressing of ion migration.

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