Paired emitter detector diode (PEDD)-based photometry--an alternative approach

Area of Science:

• Analytical Chemistry
• Physical Chemistry
• Materials Science

Background:

• Photometric devices are crucial for chemical analysis.
• Existing methods may have limitations in sensitivity or signal generation.
• The Shockley equation and Lambert-Beer law are fundamental principles in semiconductor physics and light absorption, respectively.

Purpose of the Study:

• To develop a theoretical model for Photovoltaic-enhanced detection devices (PEDD).
• To establish the relationship between analyte concentration and the generated potentiometric signal in PEDD.
• To validate the applicability of the Shockley equation and Lambert-Beer law in PEDD.

Main Methods:

• Theoretical modeling using the Shockley equation.
• Incorporation of the Lambert-Beer law to describe light absorption by analytes.
• Derivation of the potentiometric signal generated by PEDD.

Main Results:

• A model was developed for PEDD-based photometric devices.
• The model demonstrates a direct proportionality between the potentiometric analytical signal and analyte concentration.
• The findings are consistent with the principles of the Shockley equation and Lambert-Beer law.

Conclusions:

• PEDD can generate a reliable potentiometric analytical signal.
• The developed model provides a theoretical basis for understanding PEDD performance.
• This work facilitates the design and optimization of PEDD for quantitative chemical analysis.