First one-dimensional Cu2ZnSnS4-based gas sensor and enhanced performance at room temperature by polyoxometalate electron acceptor

Gas sensing materials with one-dimensional (1D) structure can provide a pathway for carriers migration. In this work, Cu2ZnSnS4/polyoxometalate (CZTS/PW12) nanofibers were synthesized by electrospinning. This is the first study on the sensing performance of 1D CZTS in the field of gas sensors. Moreover, PW12 can work as electron acceptor and improve the sensing properties. CZTS/3%PW12 has the highest response value (2.1) compared with the gas-sensing performance of all CZTS-based sensors studied previously. The 1D nanofiber structure allows carriers move in an orderly manner. Moreover, the PW12 electron acceptor can reduce electron-hole recombination. This work broadens the ideas for improving the performance of CZTS-based sensors.