Control of the shielding and the transmission of an electro-magnetic wave (∼GHz) by a visible light using flexible CdS films grown on polymer substrates

Relationship between the dark- (without a light) and photo- (with a light) resistance values by a visible light is addressed using non-stoichiometric CdS:H films grown on polyethersulfon (PES) flexible polymer substrates at room temperature by radio frequency magnetron sputtering technique. The CdS:...

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Veröffentlicht in:Sensors and actuators. B, Chemical Chemical, 2010-05, Vol.147 (1), p.67-72
Hauptverfasser: Hur, Sung-Gi, Ahn, Jun-Ku, Seong, Nak-Jin, Kim, Geun-Hong, Yoon, Soon-Gil
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container_issue 1
container_start_page 67
container_title Sensors and actuators. B, Chemical
container_volume 147
creator Hur, Sung-Gi
Ahn, Jun-Ku
Seong, Nak-Jin
Kim, Geun-Hong
Yoon, Soon-Gil
description Relationship between the dark- (without a light) and photo- (with a light) resistance values by a visible light is addressed using non-stoichiometric CdS:H films grown on polyethersulfon (PES) flexible polymer substrates at room temperature by radio frequency magnetron sputtering technique. The CdS:H films deposited at a hydrogen flow ratio of 25% exhibited a dark- and photo-sheet resistance of 2.7 × 10 5 and ∼50 Ω/square, respectively. These values were realized by an optimum control of both hydrogen doping-levels and the surface morphologies of the films. The comparison between the real and the simulated results for the shielding and the transmission by the free space measurement system in the X-band frequency range (8.2–12.4 GHz) was also addressed in this study. Samples overlapped with 13 layers of CdS:H films were consistent with the transmission results of pure aluminum metal films (0.1 Ω/square) deposited on PES substrates. By the simple stacking of the CdS:H layers, the perfect control of the shielding and the transmission of the EM wave in the range of X-band frequency is possible by a visible light alone.
doi_str_mv 10.1016/j.snb.2010.03.007
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1873-3077
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source Elsevier ScienceDirect Journals
subjects Actuators
Aluminum
CdS
Deposition
Frequency ranges
Magnetron sputtering
Morphology
Photo sensor
Shielding
Stacking
Stealth radome
X-band
title Control of the shielding and the transmission of an electro-magnetic wave (∼GHz) by a visible light using flexible CdS films grown on polymer substrates
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