期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 153, 期 1, 页码 29-36出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2010.09.074
关键词
Transparent; Flexible; Humidity sensor; Aluminum-doped ZnO(AZO); Layer-by-layer (LBL) self-assembly; Polymer electrolyte; Salt
资金
- National Science Council of Taiwan [NSC 97-2221-E-034-002, 98-2113-M-034-001-MY2]
A novel fully transparent and flexible impedance-type humidity sensor was fabricated by the LBL self-assembly of poly(2-acrylamido-2-methylpropane sulfonate) (PAMPS) polymer electrolyte and PAMPS thin films that were doped with salts (NaCl and K2CO3) on a flexible substrate (polyester film; PET) substrate with a pair of comb-like aluminum-doped ZnO (AZO) transparent electrodes. The electrical properties of the LBL self-assembled PAMPS polymer electrolyte thin films were studied in detail as functions of relative humidity (RH), to elucidate the effects of the deposition concentration of PAMPS and the number of PAMPS multilayers on the sensing properties. NaCl and K2CO3 were simultaneously doped into PAMPS polyelectrolyte to improve the sensing properties (sensitivity and linearity) of the transparent and flexible impedance-type humidity sensors. The transparency, flexibility, hysteresis, ambient temperature, response and recovery times and long-term stability were also studied. (C) 2010 Elsevier B.V. All rights reserved.
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