目前，交流驅動鈣鈦礦發光二極體仍面臨正逆偏壓下載子傳輸與發光不平衡的問題；此外，多數交流驅動元件為了實現交流電致發光，會導入多層功能層，這可能提高元件的操作電壓，並進一步加劇正逆偏壓之間的發光不平衡。本研究延續實驗室既有之製程參數，製備簡單結構之鈣鈦礦發光二極體，並添加氟化鋰以改善元件於正逆偏壓下之發光差異，以及提升交流驅動下之發光穩定性。結果顯示，未添加氟化鋰時，元件於正偏壓下之最高亮度為12，600cd/m2，且逆偏壓下僅為708.1cd/m2，而導入氟化鋰後，正偏壓下最高亮度提升至14，800 cd/m2，而逆偏壓最高亮度則提升至5，380cd/m2，且元件正逆偏壓亮度差異比由94.4%改善至63.6%。於交流電驅動時，正負半週期之亮度差異亦明顯改善，正負週期的亮度差異比從原先的72.6%改善至42.88%；此外，在操作穩定性方面，交流驅動下之T50約為435秒，高於直流正偏壓與逆偏壓之結果。綜上所述，氟化鋰的導入有助於改善鈣鈦礦發光二極體於正逆偏壓下之發光不平衡問題，進而提升元件於交流驅動下之發光平衡性與操作穩定性，使添加氟化鋰之鈣鈦礦發光二極體具有應用於交流電驅動發光元件之潛力。;Currently， AC-driven perovskite light-emitting diode (PeLED) still face challenges associated with unbalanced carrier transport and light emission under forward and reverse biases. Moreover， most AC-driven devices incorporate multiple functional layers to achieve AC electroluminescence， which may increase the operating voltage and further exacerbate the emission imbalance between the two bias directions. In this study， a simple-structure PeLED was fabricated based on the process parameters previously established in our laboratory， and lithium fluoride (LiF) was introduced to reduce the emission difference between forward and reverse biases and improve the emission stability under AC driving. The results showed that， without LiF， the device exhibited a maximum luminance of 12，600cd/m² under forward bias， whereas the maximum luminance under reverse bias was only 708.1cd/m². After the incorporation of LiF， the maximum luminance increased to 14，800cd/m² under forward bias and 5，380cd/m² under reverse bias， while the luminance difference ratio between the forward and reverse biases decreased from 94.4% to 63.6%. Under AC driving， the luminance difference between the positive and negative half-cycles was also significantly reduced， with the luminance difference ratio decreasing from 72.60% to 42.88%. In addition， in terms of operational stability， the T50 under AC driving was approximately 435s， which was longer than those obtained under DC forward and reverse biases. Overall， the incorporation of LiF effectively mitigated the emission imbalance of PeLED under forward and reverse biases， thereby improving the bidirectional emission balance and operational stability under AC driving. These results demonstrate the potential of LiF-incorporated PeLED for application in AC-driven light-emitting devices.
