Optical humidity sensors based on lead-free Cu-based perovskite nanomaterials
Ho-Seok Lee, Donghwa Lee, Haedam Jin, Dohun Baek, Mi Kyong Kim, Mi Kyong Kim, Jeongbeom Cha, Sung‐Kon Kim, Min Kim, Min Kim
Abstract
nanocrystals showed excellent reversible physisorption of water molecules. These perovskite nanocrystals exhibited reversible hydro-optical properties, including transparency changes in response to variations in relative humidity under ambient conditions. The perovskite nanomaterial humidity sensor was highly reliable and stable, with a linear correlation in a relative humidity range of 7% to 98%. Accordingly, the lead-free Cu-based perovskite materials developed herein have the potential to be employed as real-time, self-consistent humidity sensors.
Topics & Concepts
Perovskite (structure)HumidityMaterials scienceHalideNanomaterialsStoichiometryCopperNanocrystalNanotechnologyDegradation (telecommunications)Relative humidityOptoelectronicsChemical engineeringInorganic chemistryChemistryMetallurgyElectronic engineeringPhysical chemistryThermodynamicsPhysicsEngineeringPerovskite Materials and ApplicationsGas Sensing Nanomaterials and SensorsOptical properties and cooling technologies in crystalline materials