標題: A low-cost miniaturized colorimetric sensor with vertically-stacked semi-transparent finger-type organic photo detector for formaldehyde sensing
作者: Lin, Ching-Fu
Zan, Hsiao-Wen
Lu, Chia-Jung
Meng, Hsin-Fei
Soppera, Olivier
物理研究所
電機學院
光電工程學系
Institute of Physics
College of Electrical and Computer Engineering
Department of Photonics
關鍵字: Colorimetric-type sensing;Formaldehyde sensing;Finger type;Organic photodetector;Vertically integrated
公開日期: 1-Oct-2019
摘要: We proposed a sensitive colorimetric sensing system using a paper-like sensing layer on top of a vertically stacked finger-type organic photodetector (OPD) and commercial light-emitting diode (LED). The stacked OPD/LED device was small, with an area of 0.8 cm x 0.5 cm that was even smaller than a coin. Using commercial colorimetric formaldehyde (HCHO) sensing molecules to form the sensing layer, the stacked detecting system successfully detected HCHO of concentrations ranging from 40 to 1000 ppb within 20 min. Critical parameters affecting the sensitivity were investigated. The final system exhibited a stable calibration curve over 60 days. The long lifetime was attributed to using 2,6-Bis(trimethyltin)-4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo [1,2-b:4,5-b']dithiophene (PBDTTT-C-T): phenyl-C71-butyric acid methyl ester (PC71 BM) to serve as a blended system and using the current variation ratio to represent the sensing response.
URI: http://dx.doi.org/10.1016/j.orgel.2019.05.037
http://hdl.handle.net/11536/152260
ISSN: 1566-1199
DOI: 10.1016/j.orgel.2019.05.037
期刊: ORGANIC ELECTRONICS
Volume: 73
起始頁: 115
結束頁: 121
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