期刊
IEEE ELECTRON DEVICE LETTERS
卷 39, 期 9, 页码 1409-1412出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LED.2018.2857925
关键词
Electrolyte-gated In2O3 TFT; pH sensor; high pH sensitivity
资金
- Natural Science Foundation of China [61774172]
- Science and Technology Project of Guangdong Province, China [2015B010132006, 2016B090918106, 2016B010129002]
- Science and Technology Planning Project of Guangzhou, China [201607020036]
In this letter, a pH sensor was demonstrated based on In2O3-channel electrolyte-gated thin-film transistor (EGTFT). The pH sensitivity is as high as similar to 75 mV/pH under low operation voltage (<1.2 V) in the range of pH 2.00 to pH 9.18, which is over the Nernst limit of 59 mV/pH. A new theory was developed to interpret the high pH sensitivity by considering the solution as a gate dielectric. The results suggest that the EGTFT could be a potential candidate for biochemical sensors.
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