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Improved performances in organic and polymer light‐emitting diodes using solution‐processed vanadium pentoxide as a hole injection layer
Author(s) -
Lee Hyunkoo,
Kwon Yongwon,
Lee Changhee
Publication year - 2012
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1002/jsid.126
Subject(s) - pedot:pss , materials science , pentoxide , layer (electronics) , vanadium , diode , optoelectronics , oled , polymer , light emitting diode , composite material , metallurgy
We report that a solution‐processed vanadium pentoxide (V 2 O 5 ) layer can be utilized as an effective and stable hole injection layer in organic light‐emitting diodes and polymer light‐emitting diodes instead of polyethylene dioxythiophene : polystyrenesulfonate (PEDOT : PSS). The organic light‐emitting diode and polymer light‐emitting diode with the V 2 O 5 layer have driving voltages that are 2.2 and 0.3 V lower for 1000 cd/m 2 , respectively, than the devices with PEDOT : PSS. In addition, the devices with the V 2 O 5 layer show improved operational stability compared with the devices with PEDOT : PSS. Therefore, a solution‐processed V 2 O 5 layer can be utilized as an effective and stable hole injection layer instead of PEDOT : PSS.