Quantum Dot Gas Sensor Resonance Detection
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Solution Overview
Problem
Conventional gas detecting sensors, such as NDIR sensors, face inefficiencies in real-time carbon dioxide measurement due to high energy consumption and long warm-up times.
Innovation Solution
A gas detecting sensor utilizing a quantum dot layer with in-band electronic transition energy capable of resonating with vibration energy of target gas molecules, inducing a current change for real-time gas concentration measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If NDIR sensor is used for carbon dioxide measurement, then measurement capability is provided, but energy consumption is high and warm-up time is long
Solution Approach 1:
The patent changes the operating parameters of the sensor by using quantum dots with specific bandgap energies that resonate with target gas molecular vibrations. This allows the sensor to operate at room temperature without high energy consumption while maintaining measurement capability through resonance-based detection
Solution Approach 2:
The patent employs composite material structure combining quantum dots with transistor channel, creating a hybrid sensor that integrates optical absorption properties of quantum dots with electrical detection capabilities of transistors, achieving low power consumption and real-time measurement
2Loss of time
If NDIR sensor is used for carbon dioxide measurement, then measurement capability is provided, but warm-up time is long
Solution Approach 1:
The patent changes the operating temperature parameter by designing quantum dot sensors that operate effectively at room temperature rather than requiring high temperatures, eliminating long warm-up periods while maintaining measurement reliability through quantum resonance effects
Solution Approach 2:
The patent replaces the thermal-based NDIR measurement mechanism with a quantum mechanical resonance mechanism, where quantum dot electronic transitions resonate with molecular vibrations, enabling instant operation without thermal warm-up while maintaining measurement capability
3Productivity
If quantum dot layer with resonance energy is used, then real-time measurement is enabled, but device structure becomes more complex
Solution Approach 1:
The patent makes the quantum dot layer serve multiple functions simultaneously: it acts as both the sensing element that interacts with target gases through resonance and the active channel for electrical current flow, eliminating the need for separate components and simplifying the overall device structure while enabling real-time measurement
Solution Approach 2:
The patent merges the quantum dot resonance detection function with the transistor channel function into a single integrated layer, combining optical resonance properties with electrical conduction in one component, thereby achieving real-time measurement without increasing device complexity
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
Enables efficient, real-time measurement of gas concentrations by detecting current changes in the quantum dot layer, effectively addressing the limitations of existing sensors.
Implementation Method 1
the quantum dots can generate electric charges by absorbing light of various wavelengths
Implementation Method 2
measuring a current change of a quantum dot layer according to resonance of in-band electronic transition energy of a quantum dot layer and a target gas molecule
Data Source
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AI summary
The present invention relates to a gas detecting sensor, and according to one aspect of the present invention, there is provided a gas detecting sensor comprising a substrate, a gate electrode provided on the substrate, an insulating layer provided on the gate electrode, a source electrode and a drain electrode, provided on the insulating layer, respectively, an n-type channel provided between the source electrode and the drain electrode, and a quantum dot layer provided on the n-type channel and provided so as to have electronic transition energy capable of resonating with vibration energy of a target gas molecule.