Study on the fabrication and performance of Mn_1.56Co_0.96Ni_0.48O₄ film optically immersed infrared detector

Abstract

Mn_1.56Co_0.96Ni_0.48O₄ (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 × 10³ V W^− 1, detectivity of approximately 5 × 10⁸ 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.

Keywords:

• Mn_1.56Co_0.96Ni_0.48O₄ thin films
• Thermistor materials
• Optical immersion
• Uncooled infrared detectors