Improved efficiencies of hybrid organic light‐emitting diodes using efficient electron injection layer |
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| Authors: | Jayaraman Jayabharathi Pavadai Nethaji Venugopal Thanikachalam Palanivel Jeeva Ramaiyan Ramya |
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| Affiliation: | Department of Chemistry, Annamalai University, Annamalai Nagar, Tamil Nadu, India |
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| Abstract: | Hybrid organic‐inorganic light‐emitting diodes were developed with pristine ZnO (2.0 wt%) and Cu‐doped ZnO (2.0 wt%) as electron injection layer and iridium(III)‐bis‐2‐(4‐fluorophenyl)‐1‐(naphthalen‐1‐yl)‐1H‐phenanthro9,10‐d]imidazole (acetylacetonate) Ir(fpnpi)2 (acac)] as green emissive layer (521 nm). The pristine ZnO and Cu‐doped ZnO are deposited at indium tin oxide cathode and emissive layer interface. The electroluminescent performances increased by electron injection layer–Cu‐doped ZnO compared with ZnO‐based device because Cu‐doped ZnO injects electron efficiently result in balanced h+ ? e? recombination in emissive layer than ZnO‐based device. The Cu‐doped ZnO (2.0 %) device shows luminance (L) of 10 982 cd/m2 at 23.0 V (ZnO, 1450 cd/m2 at 23.0 V). |
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| Keywords: | Cu‐doped ZnO electron injection layer high efficiencies HyLEDs low voltage |
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