Organic Light-Emitting Temperature Sensor Using Delayed Fluorescence
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Solution Overview
Problem
Conventional temperature sensors face limitations in accuracy and reliability, particularly in contactless types, and require high sensitivity at a low cost and simple manufacturing process.
Innovation Solution
A temperature sensor utilizing a sensor unit with an organic light emitting layer containing a delayed fluorescent material, a temperature transfer unit, and a light intensity measuring unit to measure temperature changes through changes in light intensity, with a multilayered structure and specific materials like SnF2-Copro III and Alq3, enabling efficient interplanar transition efficiency adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If contactless type temperature sensor is used, then versatility is improved, but measurement precision deteriorates
Solution Approach 1:
The patent introduces a temperature transfer unit as an intermediary component that physically couples the measurement location to the target object. This unit transfers temperature from the target object to the sensor unit, enabling contactless measurement while maintaining accuracy by having the sensor measure the transferred temperature rather than directly contacting the target.
2Measurement precision
If contact type temperature sensor is used, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the temperature sensing system into separate functional modules: a sensor unit containing the organic light-emitting layer and electrodes, and a temperature transfer unit. This segmentation allows the sensor unit to remain simple while the transfer unit handles the complexity of thermal coupling, reducing overall device complexity while maintaining measurement precision.
3Measurement precision
If delayed fluorescent material is used in organic light emitting layer, then measurement precision is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent utilizes the temperature-dependent parameters of delayed fluorescent materials, specifically how their luminescence characteristics change with temperature. By selecting materials with appropriate thermal sensitivity and optimizing their concentration in the organic light-emitting layer, the system achieves high measurement precision while maintaining compatibility with standard manufacturing processes.
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
The solution provides a highly sensitive temperature sensor with improved accuracy and reliability, capable of flexible and transparent designs, while maintaining low production costs and simplicity.
Implementation Method 1
an organic light emitting layer including a delayed fluorescent material... capable of measuring a temperature by using a change in intensity of light using delayed fluorescence
Data Source
AI summary
There are disclosed a temperature sensor and a method for manufacturing the same. The temperature sensor comprises; a sensor unit including an organic light emitting layer including a delayed fluorescent material; a temperature transfer unit located below the sensor unit to transfer an external temperature to the sensor unit; a first electrode located on the sensor unit; a second electrode located below the sensor unit to be spaced apart from the temperature transfer unit; and a light intensity measuring unit located below the second electrode and measuring the intensity of light emitted from the organic light emitting layer. The temperature sensor can measure a temperature by using a change in the intensity of light using delayed fluorescence, thereby providing improved sensitivity.