Collecting Electrode Geometry for Temperature-Resistant Photoelectric Elements
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Solution Overview
Problem
Photoelectric conversion elements experience peeling due to temperature changes, leading to decreased efficiency or loss of function, necessitating a solution for enhanced temperature resistance.
Innovation Solution
A photoelectric conversion element design with a collecting electrode having a line-like first portion where the ratio of thickness (D) to length (L) divided by width (W), denoted as D×L/W, is kept below 2.5×10^3 μm, specifically 1.8×10^3 μm or less, to mitigate thermal stress and prevent peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the collecting electrode is made with conventional dimensions, then the electron collection function is adequate, but peeling occurs due to thermal stress during temperature changes
Solution Approach 1:
The patent applies parameter changes by optimizing the geometric dimensions of the collecting electrode to satisfy the inequality D×L/W < 2.5×10³ μm. This changes the physical parameters (thickness D, length L, width W) to reduce thermal stress and prevent peeling while maintaining electrical functionality.
Solution Approach 2:
The patent implements preliminary action by pre-designing the collecting electrode with specific dimensional constraints before the photoelectric conversion element is subjected to temperature changes. The inequality D×L/W < 2.5×10³ μm is established in advance to prevent peeling under thermal stress conditions.
2Reliability
If the collecting electrode dimensions are reduced to prevent peeling, then temperature resistance improves, but the electron collection efficiency may be affected
Solution Approach 1:
The patent optimizes multiple parameters simultaneously (thickness D, length L, width W) to satisfy the inequality D×L/W < 2.5×10³ μm. This balanced parameter adjustment ensures both temperature resistance and electron collection efficiency are maintained without sacrificing one for the other.
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
This design significantly enhances the element's resistance to temperature changes, preventing peeling and maintaining functionality under severe temperature cycles, making it suitable for applications in mobile objects and space environments.
Implementation Method 1
A photoelectric conversion element that converts light energy into electric energy
Data Source
AI summary
Provided is a photoelectric conversion element having high resistance to a temperature change. A photoelectric conversion element (10) comprises: a photoelectric conversion layer (26); an electrode layer (24) adjacent to the photoelectric conversion layer (26); and a collecting electrode (30) adjacent to the electrode layer (24). The collecting electrode (30) has a line-like first portion (31). Where L is a length of the first portion (31), W is a width of the first portion (31), and D is a thickness of the first portion (31), “D×L/W” is less than 2.5×103 μm.