Title :
Polymer Infrared Proximity Sensor Array
Author :
Chen, En-Chen ; Shih, Cheng-Yang ; Dai, Ming-Zhi ; Yeh, Han-Cheng ; Chao, Yu-Chiang ; Meng, Hsin-Fei ; Zan, Hsiao-Wen ; Liu, Wei-Ren ; Chiu, Yi-Chen ; Yeh, Yao-Tsung ; Sun, Chien-Jen ; Horng, Sheng-Fu ; Hsu, Chain-Shu
Author_Institution :
Inst. of Electron. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
fDate :
4/1/2011 12:00:00 AM
Abstract :
A near-infrared proximity sensor array is achieved by integrating a polymer light-emitting diode and a polymer photodetector (PD). A green emission is converted into deep red peaked at 670 nm by the inorganic phosphor Intematix R670 with quantum efficiency of over 20%. A bandpass filter is used to select a spectral tail of phosphor luminescence with a wavelength above 700 nm. The emissive polymer is green polyfluorene. The infrared PD contains a thick film of a blend of poly(3-hexylthiophene) and (6,6)-phenyl-C61-butyric acid methyl ester up to a thickness of 8 m. Position of a moving object at a distance of 10 cm is detected in real time by the array with dynamic images displayed on the computer screen.
Keywords :
band-pass filters; chemical sensors; infrared detectors; organic light emitting diodes; phosphors; photodetectors; polymer blends; sensor arrays; thin film sensors; (6,6)-phenyl-C61-butyric acid methyl ester; bandpass filter; computer screen; dynamic image display; green emission; inorganic phosphor Intematix R670; moving object position; near infrared proximity sensor array; phosphor luminescence; poly(3-hexylthiophene); polymer infrared proximity sensor array; polymer light emitting diode; polymer photodetector; quantum efficiency; spectral tail; thick film; Arrays; Phosphors; Photoconductivity; Polymers; Real time systems; Robot sensing systems; Array; photodetector (PD); polymer; proximity sensor;
Journal_Title :
Electron Devices, IEEE Transactions on
DOI :
10.1109/TED.2011.2107517
