Photoelectric conversion device, electronic device, and power supply module
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Solution Overview
Problem
The photoelectric conversion efficiency of flexible photoelectric conversion devices decreases over time when exposed to light for extended periods.
Innovation Solution
Incorporating a photoelectric conversion device with an electron transport layer containing metal oxide particles, where the X-ray photoelectron spectroscopy analysis shows a peak area ratio of Y/(X+Y) ≥ 0.5, indicating a predominant high-energy side peak area, which helps maintain efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a photoelectric conversion device uses a conventional electron transport layer, then the device can be manufactured with standard materials, but the photoelectric conversion efficiency decreases over time when exposed to light
Solution Approach 1:
The invention changes the chemical composition parameters of the electron transport layer by incorporating metal oxide particles with specific oxygen states. The key parameter is the ratio of oxygen atoms in different oxidation states, controlled by the peak area ratio Y/(X+Y) ≥ 0.5 in XPS analysis, where X represents oxygen in one state and Y represents oxygen in another state. This parameter change stabilizes the electron transport layer against photo-induced degradation, preventing efficiency loss over time while maintaining manufacturability with standard materials and processes
Solution Approach 2:
The invention creates a composite electron transport layer by combining metal oxide particles with a binder material. The metal oxide particles provide stable electron transport properties and resist photo-induced aggregation, while the binder holds the particles together and maintains layer integrity. This composite structure achieves both long-term operational stability under light exposure and compatibility with conventional manufacturing methods, resolving the contradiction between reliability and duration
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 maintains photoelectric conversion efficiency by suppressing deterioration over time when exposed to light, even after prolonged use.
Implementation Method 1
an electron transport layer which includes metal oxide particles
Implementation Method 2
a photoelectric conversion layer
Data Source
Figure 1~2
Figure 3A~3E
Figure 3F~3H
AI summary
A photoelectric conversion device includes a photoelectric conversion layer, and an electron transport layer. The electron transport layer includes metal oxide particles. In response to performing an X-ray photoelectron spectroscopy (XPS) analysis on the electron transport layer, two peaks representing 1s orbitals of oxygen atoms are detected. A formula Y/(X+Y)≧0.5 is satisfied, where a peak area of a peak on a low-energy side among the two peaks is X and a peak area of a peak on a high-energy side among the two peaks is Y.