Enhanced hole injection in organic light-emitting diodes utilizing a copper iodide-doped hole injection layer
作者： Meiling Shan , Haipeng Jiang , Yu Guan , Dongsu Sun , Yu Wang
DOI: 10.1039/C6RA28644E
关键词:
摘要: We have demonstrated organic light-emitting diodes (OLEDs) by incorporating copper iodide (CuI) in 4,4′,4′′-tris(N-3-methylphenyl-N-phenyl-amino)triphenylamine (m-MTDATA) as a hole injection layer (HIL) based on the emitting system of C545T–Alq3. The device with CuI-doped m-MTDATA HIL shows very low operating voltage about 4.26 and 5.70 V for 1000 10 000 cd m−2, respectively, which reveals great improvement over undoped (4.85 m−2 7.72 m−2). Furthermore, exhibits maximum power efficiency 5.88 lm W−1, 58% higher than that corresponding (3.71 W−1). improved performance could be attributed to enhanced transport due generation free charge carriers transfer from CuI molecules, leading an increase electrical conductivity formation ohmic contact at ITO/HIL interface.
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