Theoretical study and simulation of light-addressable potentiometric sensors

The light‐addressable potentiometric sensor (LAPS) is a semiconductor‐based potentiometric sensor using a light probe with an ability of detecting the concentration of biochemical species in a spatially resolved manner. As an important biomedical sensor, research has been conducted to improve its pe...

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Bibliographic Details
Published in:Physica status solidi. A, Applications and materials science Applications and materials science, 2014-06, Vol.211 (6), p.1467-1472
Main Authors: Guo, Yuanyuan, Miyamoto, Ko-ichiro, Wagner, Torsten, Schöning, Michael J., Yoshinobu, Tatsuo
Format: Article
Language:English
Subjects:
biosensors
Computer simulation
device simulations
Devices
Illumination
light-addressable potentiometric sensors
Materials science
Performance enhancement
Photocurrent
Photoelectric effect
Sensors
Simulation
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Summary:The light‐addressable potentiometric sensor (LAPS) is a semiconductor‐based potentiometric sensor using a light probe with an ability of detecting the concentration of biochemical species in a spatially resolved manner. As an important biomedical sensor, research has been conducted to improve its performance, for instance, to realize high‐speed measurement. In this work, the idea of facilitating the device‐level simulation, instead of using an equivalent‐circuit model, is presented for detailed analysis and optimization of the performance of the LAPS. Both carrier distribution and photocurrent response have been simulated to provide new insight into both amplitude‐mode and phase‐mode operations of the LAPS. Various device parameters can be examined to effectively design and optimize the LAPS structures and setups for enhanced performance. Distribution of minority carriers inside a Si‐based LAPS structure under illumination with different wavelengths.
ISSN:1862-6300
1862-6319
DOI:10.1002/pssa.201330354