Study on the fabrication and performance of Mn1.56Co0.96Ni0.48O4 film optically immersed infrared detector

Mn1.56Co0.96Ni0.48O4 (MCN) thin films with cubic spinel phase were prepared by chemical solution deposition. The variable temperature electrical properties showed that the temperature coefficient of resistance reached -4% K-1 at 295 K. The immersed and non-immersed infrared (IR) detectors based on MCN films were fabricated and characterised. The experiment results indicated that the performance of immersed detector was better than the non-immersed one. It exhibited a responsivity of 4.4 x 10(3) V W-1, detectivity of approximately 5 x 10(8) cm Hz(1/2) W-1, and thermal time constant of 18 ms at 295 K and 10 Hz. These results provide a possible avenue to develop a high-performance uncooled IR bolometer based on the thermistor materials.