MoOx Hole Transport Layer Shielding in Photoelectric Sensors
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Solution Overview
Problem
Conventional sensors using molybdenum oxide as the hole transport layer material face manufacturing difficulties due to its solubility in water, leading to dissolution issues during the cleaning process.
Innovation Solution
A photoelectric sensor design featuring a semiconductor heterostructure with a molybdenum oxide hole transport layer shielded by a light absorption layer and an electron transport layer, preventing dissolution during manufacturing, and comprising a transparent substrate, a hole transport layer, a light absorption layer, and an electron transport layer, with specific band width and work function ranges for molybdenum oxide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If molybdenum oxide is used as the hole transport layer material, then the photoelectric conversion efficiency and reliability are improved, but the manufacturing difficulty increases due to dissolution during cleaning process
Solution Approach 1:
The patent applies preliminary action by depositing the molybdenum oxide hole transport layer before the cleaning process, and then immediately covering it with the light absorption layer and electron transport layer. This sequence prevents the molybdenum oxide from being exposed to water during cleaning, thus avoiding dissolution while maintaining its photoelectric conversion efficiency and reliability benefits.
Solution Approach 2:
The patent uses the light absorption layer and electron transport layer as intermediary protective barriers between the molybdenum oxide hole transport layer and the cleaning environment. These intermediate layers prevent direct contact between water and the water-soluble molybdenum oxide, resolving the contradiction between maintaining high photoelectric efficiency and enabling easy manufacturing through cleaning processes.
2Ease of manufacture
If the surface of the hole transport layer is cleaned, then the manufacturing process can continue, but the molybdenum oxide dissolves in water
Solution Approach 1:
The patent extracts the cleaning step from the sequence of operations that expose the molybdenum oxide to water. By removing the cleaning process from the pathway that would contact the hole transport layer, the patent prevents molybdenum oxide dissolution while still allowing manufacturing to proceed through alternative cleaning approaches applied to other layers.
Solution Approach 2:
The patent performs the layer deposition action preliminarily, covering the molybdenum oxide with protective layers before any cleaning process occurs. This preliminary covering action prevents the subsequent cleaning from causing dissolution, allowing the cleaning process to be performed on other components without losing the molybdenum oxide material.
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 enhances the hole transport efficiency and sensitivity of the photoelectric sensor, reducing manufacturing complexity and costs by preventing molybdenum oxide dissolution, while maintaining high quantum efficiency and sensitivity.
Implementation Method 1
the use of transparent oxide MoOx having a high work function as a hole transport layer material may reduce the additional loss of light and enhance the hole transport effect of the sensor
Implementation Method 2
a light absorption layer disposed on one side of the hole transport layer away from the transparent substrate
Implementation Method 3
an electron transport layer disposed on one side of the light absorption layer away from the hole transport layer
Data Source
AI summary
The embodiments of the present disclosure provide a photoelectric sensor and a method of manufacturing the same, and a display panel. The photoelectric sensor includes a transparent substrate, a hole transport layer, a light absorption layer, and an electron transport layer. Disposing the hole transport layer on one side close to the transparent substrate and shielding the hole transport layer by use of the light absorption layer and the electron transport layer avoid the dissolution of molybdenum oxide in the hole transport layer during a cleaning process and reduce the difficulty in manufacturing process of the photoelectric sensor.