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# Lead-free antimony-based perovskite enables highly sensitive ammonia detection down to 1 ppm
# Newly identified sensing mechanism reveals reversible ammonia intercalation and enhanced electrical conductivity, offering potential for safety monitoring in hydrogen and ammonia energy infrastructure
CHANGWON, South Korea — A research team led by Principal Researcher Myungkwan Song of the Energy & Environment Materials Research Division at the Korea Institute of Materials Science (KIMS), headed by President Chul-jin Choi, has developed an ultrasensitive ammonia gas sensor using an environmentally friendly, lead-free perovskite material. The research was conducted in collaboration with teams led by Professor Hyung Woo Lee of Pusan National University, Professor Youngho Kang of Incheon National University, and Professor Jincheol Kim of Macquarie University in Australia. In addition to developing the high-performance sensor, the researchers elucidated, for the first time, the mechanism by which it detects ammonia, providing a new direction for the development of next-generation perovskite-based gas sensors. The technology is expected to serve as a key gas-detection solution for improving safety in an emerging hydrogen economy that uses ammonia as an energy carrier.
