Organic Optical Sensor Stack With Shared Electrode Power Generation
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Solution Overview
Problem
Existing detection devices using organic photovoltaic devices as solar cells fail to generate sufficient power, and optical sensors using organic photodiodes do not effectively detect biometric information due to suboptimal configurations.
Innovation Solution
A detection device is designed with an organic optical sensor and organic photovoltaic device stacked on a substrate, featuring light-transmitting electrodes and a sealing film, with distinct areas optimized for detection sensitivity and power generation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If organic photovoltaic devices are used as solar cells in the detection device, then power generation capability is provided, but the power generation efficiency is insufficient
Solution Approach 1:
The patent changes the optical parameters of the device by making specific electrodes (first lower electrode and common electrode) light-transmitting, which allows light to reach the organic photovoltaic device effectively. This parameter change resolves the contradiction by enabling both power generation capability and improved power generation efficiency through optimized light transmission.
2Reliability
If organic photodiodes are used for optical sensing, then detection function is provided, but detection sensitivity is insufficient
Solution Approach 1:
The patent optimizes detection sensitivity by changing the optical parameters of the electrodes. The first lower electrode and common electrode are designed with light-transmitting properties, allowing maximum light transmission to the organic photodiode. This parameter optimization resolves the contradiction by maintaining reliable detection function while significantly improving detection sensitivity.
3Productivity
If light-transmitting electrodes are used in both organic sensor and photovoltaic device, then both functions can operate effectively, but device complexity increases
Solution Approach 1:
The common electrode serves multiple functions: it acts as the upper electrode for the organic photovoltaic device and the lower electrode for the organic optical sensor. This multi-functional design resolves the contradiction by enabling both photovoltaic and optical sensing functions to operate effectively while reducing the total number of electrodes, thereby simplifying the device structure.
4Reliability
If multiple layers are stacked for both sensor and photovoltaic device, then functional performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the structure of the organic optical sensor and organic photovoltaic device by stacking them in an integrated configuration where the common electrode serves both devices. This merging approach resolves the contradiction by maintaining the necessary multi-layer structure for functional performance while reducing manufacturing complexity through structural integration and shared components.
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 device achieves enhanced biometric information detection sensitivity and power generation efficiency by optimizing the arrangement and configuration of optical sensors and solar cells, ensuring satisfactory performance in both functions.
Implementation Method 1
A current flows through each of the OPDs used in a detection device when irradiated with light
Implementation Method 2
the OPD has a configuration similar to that of a photovoltaic device such as a solar cell
Data Source
AI summary
According to an aspect, a detection device includes: a substrate; an organic optical sensor in which a first lower electrode, a first lower buffer layer, a first active layer, a first upper buffer layer, a first upper electrode, and a common electrode are stacked in the order as listed, in a detection area of the substrate; an organic photovoltaic device in which a second lower electrode, a second lower buffer layer, a second active layer, a second upper buffer layer, and the common electrode are stacked in the order as listed, in the detection area of the substrate; and a sealing film that covers the organic optical sensor and the organic photovoltaic device. The first lower electrode of the organic optical sensor and the common electrode of the organic photovoltaic device each have a light-transmitting property.