標題: Photo-assisted recovery in ammonia sensor based on organic vertical diode
作者: Lin, Yu-Ting
Yu, Shang-Yu
Zan, Hsiao-Wen
Yeh, Ping-Hung
Lu, Chia-Jung
Meng, Hsin-Fei
Luo, Chih-Wei
Soppera, Olivier
電子物理學系
物理研究所
光電工程學系
Department of Electrophysics
Institute of Physics
Department of Photonics
關鍵字: Ammonia;Fast recovery;Light-assisted recovery;Light emitting diode;Organic gas sensor
公開日期: 1-Apr-2019
摘要: In this article, a photo-assisted gas sensor was provided to solve the slow recovering issue of the organic gas sensor. The proposed organic gas sensor can detect ammonia in parts-per-billion regime in 30 s and can be multiple uses, but the long recovery time about 5 min places difficulty to realize rapidly multiple-time sensing. Therefore, we used the photo-absorption ability in the organic semiconductor layer to generate the photocurrent and hence to compensate the current drop due to the ammonia absorption. The recovery time was significantly reduced to be only 1 min. The specific wavelength was also found to match the absorption spectrum in different organic sensing materials. As a comparison, the quartz crystal microbalance (QCM) was used to clarify the gas absorption and desorption mechanism. It is believed that this photo-assisted gas detection could be a general method to solve the slow recovery in organic-based gas sensors.
URI: http://dx.doi.org/10.1016/j.orgel.2019.01.036
http://hdl.handle.net/11536/148862
ISSN: 1566-1199
DOI: 10.1016/j.orgel.2019.01.036
期刊: ORGANIC ELECTRONICS
Volume: 67
起始頁: 272
結束頁: 278
Appears in Collections:Articles