TY - JOUR
T1 - Bismuth-based lead-free perovskite film for highly sensitive detection of ammonia gas
AU - Li, Guishun
AU - Zhang, Yu
AU - Zhao, Xianyan
AU - Lin, Jianqiu
AU - She, Changkun
AU - Liu, Shaohua
AU - Jing, Chengbin
AU - Cheng, Ya
AU - Chu, Junhao
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/10/15
Y1 - 2021/10/15
N2 - Lead halide perovskite materials have received increased attention for sensing applications, due to their environmental sensitivity. However, the lead toxicity represents a potential obstacle to their practical sensing application. Here, we report a lead-free (phenethylammonium)3Bi2Br9-based sensor for ammonia (NH3) gas detection. The sensor exhibits high gas response (R0/Rg = 1.76, at 30 ppm NH3), short response/recovery time (39/130 s), low detection limit (0.2 ppm), and good reversibility. The NH3 sensing mechanism is established using a combination of X‐ray diffraction (XRD), absorption spectra, Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy and differential thermal analysis (DTA) measurements. The results demonstrate that the electron-donating NH3 molecules may first absorb onto the surface of the (phenethylammonium)3Bi2Br9 film for electron-injection, and then infiltrate it to dissociate the Bi2Br93− bi-octahedra. It will form a new NH4Br substance, different from an NH3-induced phase transformation in perovskite CH3NH3PbI3. This work reveals that it is feasible to design high-performance gas sensors based on environmentally-friendly Bi-based perovskites.
AB - Lead halide perovskite materials have received increased attention for sensing applications, due to their environmental sensitivity. However, the lead toxicity represents a potential obstacle to their practical sensing application. Here, we report a lead-free (phenethylammonium)3Bi2Br9-based sensor for ammonia (NH3) gas detection. The sensor exhibits high gas response (R0/Rg = 1.76, at 30 ppm NH3), short response/recovery time (39/130 s), low detection limit (0.2 ppm), and good reversibility. The NH3 sensing mechanism is established using a combination of X‐ray diffraction (XRD), absorption spectra, Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy and differential thermal analysis (DTA) measurements. The results demonstrate that the electron-donating NH3 molecules may first absorb onto the surface of the (phenethylammonium)3Bi2Br9 film for electron-injection, and then infiltrate it to dissociate the Bi2Br93− bi-octahedra. It will form a new NH4Br substance, different from an NH3-induced phase transformation in perovskite CH3NH3PbI3. This work reveals that it is feasible to design high-performance gas sensors based on environmentally-friendly Bi-based perovskites.
KW - (phenethylammonium)BiBr
KW - Lead-free
KW - NH detection
KW - Sensing
UR - https://www.scopus.com/pages/publications/85108435938
U2 - 10.1016/j.snb.2021.130298
DO - 10.1016/j.snb.2021.130298
M3 - 文章
AN - SCOPUS:85108435938
SN - 0925-4005
VL - 345
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
M1 - 130298
ER -