Solution-Processed Chloroaluminum Phthalocyanine (ClAlPc) Ammonia Gas Sensor with Vertical Organic Porous Diodes

Abstract

In this research work, the gas sensing properties of halogenated chloroaluminum phthalocyanine (ClAlPc) thin films were studied at room temperature. We fabricated an air-stable ClAlPc gas sensor based on a vertical organic diode (VOD) with a porous top electrode by the solution process method. The surface morphology of the solution-processed ClAlPc thin film was examined by field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM). The proposed ClAlPc-based VOD sensor can detect ammonia (NH3) gas at the ppb level (100~1000 ppb) at room temperature. Additionally, the ClAlPc sensor was highly selective towards NH3 gas compared to other interfering gases (NO2, ACE, NO, H2S, and CO). In addition, the device lifetime was tested by storing the device at ambient conditions. The effect of relative humidity (RH) on the ClAlPc NH3 gas sensor was also explored. The aim of this study is to extend these findings on halogenated phthalocyanine-based materials to practical electronic nose applications in the future.

Reconfigurable Modular Platform for Prolonged Sensing of Toxic Gases in Particle Polluted Environments

“…Gas detection has wide applications in environmental monitoring, security, industrial quality control, etc. Ammonia (NH 3 ) is a major industrial chemical product in the world while classified as dangerous for the environment [1][2][3][4]. Exposure to high concentrations of ammonia could be lethal, while in low concentrations, it can cause coughing, nose, and throat irritation in the short term.…”

“…Exposure to high concentrations of ammonia could be lethal, while in low concentrations, it can cause coughing, nose, and throat irritation in the short term. Before designing a toxic gas sensor, several key aspects should be considered such as sensitivity, the minimum concentration of target gases they can detect, response speed, reversibility, energy consumption, and fabrication costs [3,[5][6][7]. The ammonia concentration varies from one industry to another.…”

E-Nose-Driven Advancements in Ammonia Gas Detection: A Comprehensive Review from Traditional to Cutting-Edge Systems in Indoor to Outdoor Agriculture

“…One of the best advantages of the method is that it could identify the concentration of ammonia and differentiate the ammonia in different mixtures that contain methanol and water and from ethylenediamine and triethylamine. For the detection of NH 3 gas in 100 ppb, the gas-sensing properties of halogenated chloroaluminum phthalocyanine (ClAlP) narrow features with a rotating layer were taken into consideration by author [108].…”