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NPB-DPA, full name N,N'-Bis[4-(diphenylamino)phenyl]-N,N'-di(1-naphthyl)benzidine, is a derivative of triarylamines. It has a skeleton of two joined triarylamines with two diphenylamine as pending units. It is electron-rich and commonly used as a hole-injection layer (HIL) material in OLED devices.
NPB is normally used as a hole-transporting layer (HTL) material. In comparison, NPB-DPA is inserted between an ITO anode and a HTL to effectively modify the cathode surface and facilitate the collection of the holes to the electrode.
Like NPB-DPA, NPB's sister compound NPNPB is also commonly used as the buffer layer between a HTL and an anode to lower the barrier of the hole injections.
New spirobenzoanthracene derivatives with naphthylanthracene core: Synthesis and application in sky-blue fluorescent host materials, M. Kim et al., Dyes and Pigments 105, 202-207 (2014); doi: 10.1016/j.dyepig.2014.02.005.
New spiro[benzotetraphene-fluorene] Derivatives: Synthesis and Application in Sky-Blue Fluorescent Host Materials, J. Cha et al., J. Fluoresc., 24, 1215–1224 (2014); DOI: 10.1007/s10895-014-1403-2.
To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.