Organic Semiconductor ECL Detector for Compact Sample Analysis
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Solution Overview
Problem
Existing electrochemiluminescence (ECL) devices for sample characterization face challenges such as light scattering, complex and expensive readout systems, and non-integrated measurement components, which lead to measurement errors and unsuitable designs for compact or mobile applications.
Innovation Solution
A device utilizing an optoelectronic image detection component based on organic semiconductors, which can be positioned either above or below a transparent or non-transparent working electrode, allowing for compact construction and direct integration with the sample, using materials like TCOs, carbon nanotubes, and thin metal layers, and enabling flexible manufacturing through printing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a carbon electrode is used as the working electrode, then molecules bind non-specifically and remain functional, but the electrode is not transparent requiring large readout units positioned above the sample
Solution Approach 1:
The patent inverts the conventional readout configuration by positioning the optoelectronic detection component below the working electrode instead of above it. This allows the use of transparent substrates and electrodes, enabling detection from the opposite side while maintaining compact dimensions suitable for mobile applications.
Solution Approach 2:
The patent changes the transparency parameter of the working electrode by using transparent conductive oxides (TCOs) or other transparent materials instead of traditional opaque carbon electrodes. This parameter change enables both compact readout unit design and positioning flexibility while maintaining electrical functionality.
2Measurement precision
If CCD cameras with movement systems are used for readout, then sample detection is achieved, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts and eliminates the complex movement system and imaging optics from the readout unit. By using a stationary optoelectronic detection component with a wide field of view, the system achieves sample detection without requiring mechanical positioning mechanisms, thereby reducing complexity and cost while maintaining measurement precision.
Solution Approach 2:
The patent uses a planar optoelectronic detection component that captures the entire sample array simultaneously in a single frame, replacing the sequential scanning approach of CCD cameras with movement systems. This parallel detection method achieves the same measurement precision with significantly reduced device complexity.
3Measurement precision
If electrochemiluminescence is used for sample identification, then no light scattering occurs and weak reactions can be detected, but the intensity of emitted radiation is directly proportional to reaction intensity requiring precise measurement
Solution Approach 1:
The patent introduces an optoelectronic detection component based on organic semiconductors as an intermediary between the electrochemiluminescence source and the measurement system. This intermediary converts the optical signal into an electrical signal with high efficiency, preserving the linear relationship between reaction intensity and emitted radiation intensity while enabling precise measurement of even very weak reactions without information loss.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution provides accurate and reliable detection of weak reactions without light scattering, reduces device complexity and size, and is cost-effective, making it suitable for both stationary and mobile applications while maintaining high spectral efficiency and environmental sustainability.
Implementation Method 1
an electric voltage applied across a counter electrode and a working electrode on which the sample spots are disposed excites the sample to luminescence
Implementation Method 2
a reading of the luminescence is taken using an optoelectronic component
Data Source
AI summary
Device (1) for optoelectronically characterizing samples by means of electrochemiluminescence (ECL), in which an electric voltage applied across a counter electrode (6) and a working electrode (2) on which the sample spots are disposed excites the sample to luminescence and a reading of the luminescence is taken using an optoelectronic component, characterized in that the optoelectronic component comprises an image detection component (4) with a photoactive layer (10) made from organic semiconductors between two electrode layers (11,14).