Pyroelectric infrared detector based on polyaniline/polyvinylidene fluoride blend

In this work a novel and straightforward pyroelectric infrared detector based on blend of dodecylbenzene sulfonic acid (DBSA) doped polyaniline (PANI) and polyvinylidene fluoride (PVDF) with different weight percentages of PANI was fabricated. The crystalline and morphological properties of this blend were characterized using X-ray diffraction and scanning electron microscope, respectively. It was found that doped PANI hinders α-phase while promotes the polar β-phase formation of PVDF. The voltage responsivity (RV), noise equivalent power (NEP), and specific detectivity (D*) of PANI/PVDF blend were measured in the range from 0.01 Hz to 1000 Hz using an electrical chopped circuit. The optimum values of RV and D* were 157 V/W and 1.82 × 106 cm Hz1/2/W, respectively, while the minimum value of NEP was about 2.67 × 10−7 W/√Hz for the blend of 10 wt.% of PANI.