TY - JOUR
T1 - Superior self-powered room-temperature chemical sensing with light-activated inorganic halides perovskites
AU - Chen, Hongjun
AU - Zhang, Meng
AU - Bo, Renheng
AU - Barugkin, Chog
AU - Zheng, Jianghui
AU - Ma, Qingshan
AU - Huang, Shujuan
AU - Ho-Baillie, Anita W.Y.
AU - Catchpole, Kylie R.
AU - Tricoli, Antonio
PY - 2018/2/15
Y1 - 2018/2/15
N2 - Hybrid halide perovskite is one of the promising light absorber and is intensively investigated for many optoelectronic applications. Here, the first prototype of a self-powered inorganic halides perovskite for chemical gas sensing at room temperature under visible-light irradiation is presented. These devices consist of porous network of CsPbBr3 (CPB) and can generate an open-circuit voltage of 0.87 V under visible-light irradiation, which can be used to detect various concentrations of O2 and parts per million concentrations of medically relevant volatile organic compounds such as acetone and ethanol with very quick response and recovery time. It is observed that O2 gas can passivate the surface trap sites in CPB and the ambipolar charge transport in the perovskite layer results in a distinct sensing mechanism compared with established semiconductors with symmetric electrical response to both oxidizing and reducing gases. The platform of CPB-based gas sensor provides new insights for the emerging area of wearable sensors for personalized and preventive medicine.
AB - Hybrid halide perovskite is one of the promising light absorber and is intensively investigated for many optoelectronic applications. Here, the first prototype of a self-powered inorganic halides perovskite for chemical gas sensing at room temperature under visible-light irradiation is presented. These devices consist of porous network of CsPbBr3 (CPB) and can generate an open-circuit voltage of 0.87 V under visible-light irradiation, which can be used to detect various concentrations of O2 and parts per million concentrations of medically relevant volatile organic compounds such as acetone and ethanol with very quick response and recovery time. It is observed that O2 gas can passivate the surface trap sites in CPB and the ambipolar charge transport in the perovskite layer results in a distinct sensing mechanism compared with established semiconductors with symmetric electrical response to both oxidizing and reducing gases. The platform of CPB-based gas sensor provides new insights for the emerging area of wearable sensors for personalized and preventive medicine.
KW - chemical gas sensors
KW - inorganic halides perovskites
KW - room temperature
KW - self-powered
KW - visible light
UR - http://www.scopus.com/inward/record.url?scp=85042084281&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/arc/DP150101939
UR - http://purl.org/au-research/grants/arc/DE160100569
UR - http://purl.org/au-research/grants/arc/DP160102955
U2 - 10.1002/smll.201702571
DO - 10.1002/smll.201702571
M3 - Article
C2 - 29280263
AN - SCOPUS:85042084281
SN - 1613-6810
VL - 14
JO - Small
JF - Small
IS - 7
M1 - 1702571
ER -