Aqueous solution-processed MoO3 thick films as hole injection and short-circuit barrier layer in large-area organic light-emitting devices

Thick molybdenum trioxide (MoO3) films (ca. 120 nm) were successfully deposited by an aqueous solution-processed method based on direct dissolution of the powder of ammonium molybdate ((NH4)6Mo7O24∙4H2O) precursors in deionized water. X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelect...

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Bibliographic Details
Published inApplied physics express Vol. 7; no. 11
Main Authors Liang, Jian, Zu, Feng-Shuo, Ding, Lei, Xu, Mei-Feng, Shi, Xiao-Bo, Wang, Zhao-Kui, Liao, Liang-Sheng
Format Journal Article
LanguageEnglish
Published The Japan Society of Applied Physics 01.11.2014
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Summary:Thick molybdenum trioxide (MoO3) films (ca. 120 nm) were successfully deposited by an aqueous solution-processed method based on direct dissolution of the powder of ammonium molybdate ((NH4)6Mo7O24∙4H2O) precursors in deionized water. X-ray photoelectron spectroscopy (XPS) and ultraviolet photoelectron spectroscopy (UPS) analyses showed that aqueous solution-processed MoO3 (sMoO3) has almost the same characteristics as the vacuum-evaporated MoO3 (eMoO3). Besides acting as a hole injection material, thicker MoO3 operated as a short-circuit barrier layer in large-scale organic light-emitting devices (OLEDs). The successful fabrication of 150 × 150 mm2 lighting panels confirmed the dual function of thick sMoO3 films in large-area OLEDs.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.7.111601