4,4′,4″-Tris(4-naphthalen-1-yl-phenyl)amine as a multifunctional material for organic light-emitting diodes, organic solar cells, and organic thin-film transistors

We have developed the first multifunctional organic material, 4,4′,4″-tris(4-naphthalen-1-yl-phenyl)amine (1-TNPA), which can be used as a deep blue emitting and hole-transporting material in organic light-emitting diodes (OLEDs), as a donor material in organic solar cells (OSCs), and as an active material in organic thin-film transistors (OTFTs). In particular, in the case of 1-TNPA-based OLEDs, efficient emission characteristics, the emission of deep-blue light similar to the National Television Standard Committee (NTSC) standard blue, and more efficient hole transport than that in the case of NPD-based OLEDs were observed. 1-TNPA can be also used as a donor in OSCs and as an organic semiconductor in OTFTs.