TY - JOUR
T1 - High-Performance Optoelectronic Gas Sensing Based on All-Inorganic Mixed-Halide Perovskite Nanocrystals with Halide Engineering
AU - Kim, Jiyun
AU - John, Alishba T.
AU - Li, Hanchen
AU - Huang, Chien Yu
AU - Chi, Yuan
AU - Anandan, Pradeep Raja
AU - Murugappan, Krishnan
AU - Tang, Jianbo
AU - Lin, Chun Ho
AU - Hu, Long
AU - Kalantar-Zadeh, Kourosh
AU - Tricoli, Antonio
AU - Chu, Dewei
AU - Wu, Tom
N1 - Funding Information:
This work was financially supported by the Australian Research Council (DP190103316 and DP230101847) and UNSW SHARP Project (RG163043). A.T.J. and A.T. acknowledge the financial support of Our Health in Our Hands (OHIOH), a strategic initiative of the Australian National University, which aims to transform healthcare by developing new personalised health technologies and solutions in collaboration with patients, clinicians, and health care providers.
Publisher Copyright:
© 2023 The Authors. Small Methods published by Wiley-VCH GmbH.
PY - 2023/6
Y1 - 2023/6
N2 - Gas sensors are of great interest to portable and miniaturized sensing technologies with applications ranging from air quality monitoring to explosive detection and medical diagnostics, but the existing chemiresistive NO2 sensors still suffer from issues such as poor sensitivity, high operating temperature, and slow recovery. Herein, a high-performance NO2 sensors based on all-inorganic perovskite nanocrystals (PNCs) is reported, achieving room temperature operation with ultra-fast response and recovery time. After tailoring the halide composition, superior sensitivity of ≈67 at 8 ppm NO2 is obtained in CsPbI2Br PNC sensors with a detection level down to 2 ppb, which outperforms other nanomaterial-based NO2 sensors. Furthermore, the remarkable optoelectronic properties of such PNCs enable dual-mode operation, i.e., chemiresistive and chemioptical sensing, presenting a new and versatile platform for advancing high-performance, point-of-care NO2 detection technologies.
AB - Gas sensors are of great interest to portable and miniaturized sensing technologies with applications ranging from air quality monitoring to explosive detection and medical diagnostics, but the existing chemiresistive NO2 sensors still suffer from issues such as poor sensitivity, high operating temperature, and slow recovery. Herein, a high-performance NO2 sensors based on all-inorganic perovskite nanocrystals (PNCs) is reported, achieving room temperature operation with ultra-fast response and recovery time. After tailoring the halide composition, superior sensitivity of ≈67 at 8 ppm NO2 is obtained in CsPbI2Br PNC sensors with a detection level down to 2 ppb, which outperforms other nanomaterial-based NO2 sensors. Furthermore, the remarkable optoelectronic properties of such PNCs enable dual-mode operation, i.e., chemiresistive and chemioptical sensing, presenting a new and versatile platform for advancing high-performance, point-of-care NO2 detection technologies.
KW - halide engineering
KW - nanocrystals
KW - NO sensor
KW - optoelectronic sensing
KW - perovskites
UR - http://www.scopus.com/inward/record.url?scp=85161976442&partnerID=8YFLogxK
U2 - 10.1002/smtd.202300417
DO - 10.1002/smtd.202300417
M3 - Journal article
AN - SCOPUS:85161976442
SN - 2366-9608
JO - Small Methods
JF - Small Methods
M1 - 2300417
ER -