Methane-Sensing Performance Enhancement in Graphene Oxide/Mg:ZnO Heterostructure Devices

作者：Sarkar Argha; Maity Santanu^*; Joseph Aneesh M; Chakraborty S K; Thomas Tiju

来源：Journal of Electronic Materials, 2017, 46(10): 5485-5491.

DOI：10.1007/s11664-017-5619-1

• Sensitivity and transient response
• reduced graphene oxide
• heterostructure
• methane sensor

Methane-sensing using reduced doped graphene oxide (rGO)/Mg:ZnO heterostructure devices is reported here. All samples are tested with CH4 in dry air ambient by a gas-analyzing set-up. Crystallinity of the sensing film is improved through annealing treatment (at 800A degrees C). The active device area (i.e., the rGO and rGO/Mg:ZnO heterostructures) are characterized using scanning electron microscope imaging, x-ray diffraction, and x-ray spectroscopy measurements. Electrical performance of the fabricated device is optimized. rGO/Mg:ZnO heterostructures are substantially more sensitive and have better transient response than bare rGO-based sensor devices. All fundamental parameters such as sensitivity and response-recovery time are examined and reported in detail.

• 出版日期2017-10