Organic Photodetector Layer Structure for Higher Photocurrent SNR
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing organic photodetectors face challenges in improving photo current density and signal-to-noise ratio, necessitating advancements in photodetector materials and structures.
Innovation Solution
The introduction of a photoconversion unit comprising specific electron donor and acceptor compounds with defined roughness and enthalpy of fusion, arranged between an anode and organic semiconductor layers, enhances photocurrent and signal-to-noise ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic photodetector materials and structures are used, then device simplicity is maintained, but photo current density and signal-to-noise ratio are insufficient
Solution Approach 1:
The photoconversion unit is divided into multiple functional layers including electron donor layer, electron acceptor layer, and additional compound layers with specific roughness and enthalpy characteristics. This segmentation allows each layer to perform its specific function optimally, improving photo current density and signal-to-noise ratio through specialized material properties in each segment.
Solution Approach 2:
The patent employs composite material structures by combining electron donor compounds, electron acceptor compounds, and additional compounds with specific physical properties (roughness ≥7 nm, enthalpy of fusion ≥112 J/g). This composite approach creates synergistic effects that enhance photodetector performance beyond what single materials can achieve.
2Productivity
If the photoconversion unit uses simple materials, then manufacturing is easier, but photocurrent density is insufficient
Solution Approach 1:
The patent specifies precise parameter ranges for materials including root means square roughness ≥7 nm and enthalpy of fusion ≥112 J/g. By controlling these physical parameters, the invention achieves high photocurrent density through optimized material properties while providing clear manufacturing specifications that guide the deposition process.
Solution Approach 2:
Different regions of the photoconversion unit are assigned different material qualities: the electron donor layer, electron acceptor layer, and additional compound layers each have tailored properties. The additional compounds with specific roughness and enthalpy values are placed in specific positions to optimize local charge generation and transport, thereby enhancing overall photocurrent density.
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 proposed structure results in improved photocurrent and signal-to-noise ratio in organic photodetectors, demonstrating enhanced performance.
Implementation Method 1
the photoconversion unit is selected from (i) or (ii) (i) the photoconversion unit comprises a first layer and a second layer... wherein the first layer comprises an electron donor compound; wherein the second layer comprises an electron acceptor compound
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The present invention relates to an organic photodetector, an organic electronic device comprising the organic phototector as well as an display device comprising the organic electronic device.