The development of photonic sensors has attracted the attention of numerous research groups and companies around the world, due to their remarkable applications in diverse fields. In the case of ultraviolet sensors, wide bandgap semiconductor materials are commonly used, whereas for infrared detection, metal tellurides and sulfides are frequently employed. In this work, the photocurrent properties of LiNiO₂ were investigated with the aim of developing a photonic sensor that detects radiation in the range of ultraviolet to near infrared. LiNiO₂ is a well-known material that is intensively investigated for cathode material for Li-ion rechargeable batteries. In addition to its outstanding electrochemical properties, it has a narrow bandgap energy of approximately 0.6 eV, which suggests its application in photonic detectors. Single-phase LiNiO₂ was prepared by a soft chemistry route (coprecipitation) at 700 °C, in air. The photodetection properties were investigated using light emitting diodes (LEDs) with various optical irradiances and exposure times. The results show uniform and reproducible response patterns over numerous on/off periods, being possible to identify variations in the optical irradiance through changes in photocurrent. The detection mechanism is based on the formation of electron-hole pairs produced during light exposure and their mobility under a bias voltage. One application of these results focuses on the development of a UV photodetector that helps prevent skin cancer and eye damage caused by sun exposure.

由于光子传感器在各个领域的卓越应用，其发展吸引了全球众多研究小组和公司的关注。在紫外线传感器的情况下，通常使用宽带隙半导体材料，而对于红外检测，经常使用金属碲化物和硫化物。在这项工作中，研究了LiNiO ₂的光电流特性，目的是开发一种可检测紫外到近红外范围内辐射的光子传感器。锂镍₂是一种众所周知的材料，正在对锂离子可充电电池的正极材料进行深入研究。除了出色的电化学性能外，它还具有约0.6 eV的窄带隙能量，这表明它已在光子探测器中得到应用。单相LiNiO ₂通过软化学路线（共沉淀）在空气中于700°C制备。使用具有各种光学辐照度和曝光时间的发光二极管（LED）研究了光电检测性能。结果表明，在多个开/关期间内，响应模式一致且可重现，可以通过光电流的变化来确定光辐照度的变化。该检测机制基于曝光期间产生的电子-空穴对的形成及其在偏置电压下的迁移率。这些结果的一个应用集中于开发有助于防止皮肤癌和阳光暴晒造成的眼睛伤害的紫外线光电探测器的开发。