Yb∶MgAg纳米双层阴极的光电特性改善
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摘要
MgAg纳米合金作为有机电致发光阴极,具有功函数低、稳定性高等优点,而提升Ag的比例,降低MgAg纳米合金的厚度,可提升MgAg的透过率。在蒸镀MgAg纳米合金之前先沉积Yb纳米金属薄层,可降低阴极功函数,减少接触势垒,改善器件效率。实验表明,在Yb膜厚为5?、 MgAg膜厚为120?、Ag比例为70%的条件下,器件效率能达到红色41.4 cd/A,绿色94.9 cd/A,蓝色103.4 cd/A/CIEy,并具有较低的功耗和较长的寿命。
As organic light emitting cathode, MgAg nano-alloy has the advantages of low work function and high stability. Increasing the ratio of Ag and reducing the thickness of MgAg nano-alloy can improve the transmittance of MgAg. Embedding Yb nano-metal layer before MgAg nano-alloy can reduce cathode work function, reduce contact barrier and improve device efficiency. ExpEriments show that under Yb 5 ?/MgAg 120 ?, the device efficiency can reach red 41.4 cd/A, green 94.9 cd/A, blue 103.4 cd/A/CIEy, with low power consumption and long life.
As organic light emitting cathode, MgAg nano-alloy has the advantages of low work function and high stability. Increasing the ratio of Ag and reducing the thickness of MgAg nano-alloy can improve the transmittance of MgAg. Embedding Yb nano-metal layer before MgAg nano-alloy can reduce cathode work function, reduce contact barrier and improve device efficiency. ExpEriments show that under Yb 5 ?/MgAg 120 ?, the device efficiency can reach red 41.4 cd/A, green 94.9 cd/A, blue 103.4 cd/A/CIEy, with low power consumption and long life.
引文
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