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Theoretical study and simulation of light‐addressable potentiometric sensors
Author(s) -
Guo Yuanyuan,
Miyamoto Koichiro,
Wagner Torsten,
Schöning Michael J.,
Yoshinobu Tatsuo
Publication year - 2014
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201330354
Subject(s) - potentiometric sensor , photocurrent , potentiometric titration , computer science , materials science , wavelength , optoelectronics , phase (matter) , electronic engineering , electrode , chemistry , engineering , organic chemistry
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.