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Improved efficiencies of hybrid organic light‐emitting diodes using efficient electron injection layer
Author(s) -
Jayabharathi Jayaraman,
Nethaji Pavadai,
Thanikachalam Venugopal,
Jeeva Palanivel,
Ramya Ramaiyan
Publication year - 2018
Publication title -
journal of physical organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.325
H-Index - 66
eISSN - 1099-1395
pISSN - 0894-3230
DOI - 10.1002/poc.3806
Subject(s) - electroluminescence , chemistry , layer (electronics) , doping , oled , iridium , cathode , diode , indium tin oxide , light emitting diode , optoelectronics , photochemistry , materials science , organic chemistry , catalysis
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)‐1 H ‐phenanthro[9,10‐ 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/m 2 at 23.0 V (ZnO, 1450 cd/m 2 at 23.0 V).