Synthesis and Characterisation of 2-(4-(Aryl)phenyl)benzothiazoles

Polyacene-benzothiazole derivatives (2-(4-(anthracen-9-yl)phenyl)benzo[d]thiazole (APBT), 2-(4-(naphth-alen1-yl)phenyl)benzo[d]thiazole (NPBT), and 2-(4-(phenyl)phenyl)benzo[d]thiazole (or 2-(biphen-yl-4-yl)benzo[d] thiazole (PPBT)) were synthesized and fabricated into organic light-emitting diode (OLED) devices. Deep blue light of 458, 437, and 438 nm was emitted from the APBT, NPBT, and PPBT devices, respectively; the corresponding derivative energy band gaps (Eg) were 2.26, 2.21, and 2.44 eV, respectively. Being the most stable amongst the three derivatives, APBT device emitted the most intense colour. CIE coordinates of this device changed from (0.187, 0.281) to (0.183, 0.234) with increasing applied voltage in the range of 5.5-9.5 V, confirming the position in the deep blue range.

Automated summary

Polyacene-benzothiazole derivatives were synthesized and fabricated into OLED devices, with APBT device being the most stable and emitting the most intense color in the deep blue range according to CIE coordinates.