Modular Lamination for Organic Photosensitive Devices
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Solution Overview
Problem
Current methods for producing large-area organic photosensitive devices, such as solar cells, face challenges in achieving high efficiency, reliability, and low fabrication costs, particularly due to the fragility of organic semiconducting materials and the need for harsh processing environments, which limits the optimization of photoactive layers and sub-cells.
Innovation Solution
A modular lamination approach is employed to process individual components and layers of organic photosensitive devices, allowing for separate optimization of each component and layer, thereby decoupling the processing steps to enhance the robustness, reliability, and efficiency of the final device, while avoiding harsh environments that typically damage these materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional harsh processing environments are used to fabricate organic photosensitive devices, then metal electrodes can be defined, but the organic semiconducting materials are damaged due to their fragility
Solution Approach 1:
The device fabrication is divided into separate modules: organic photosensitive layers are processed independently on one substrate, metal electrodes are fabricated separately on another substrate, and then the two are laminated together. This segmentation allows each component to be optimized and processed under appropriate conditions without compromising the other.
Solution Approach 2:
Metal electrodes are pre-fabricated on a separate substrate (such as a glass slide or flexible substrate) using conventional harsh processing techniques before the organic layers are applied. This preliminary electrode fabrication eliminates the need to process organic materials in harsh environments, preserving material integrity while still achieving proper electrode definition.
2Manufacturing precision
If individual components are processed separately to optimize each layer, then processing conditions can be optimized, but the device assembly becomes more complex
Solution Approach 1:
After separate processing and optimization of individual components, the patent merges them through lamination - bonding the organic photosensitive layer to the electrode-containing substrate. This merging step combines the benefits of separate optimization while maintaining a relatively simple overall process through the use of standard lamination techniques.
3Productivity
If conventional fabrication methods are used, then devices can be produced, but fabrication costs are high and efficiency is limited
Solution Approach 1:
The patent changes the processing parameters by eliminating harsh chemical and thermal treatments from the organic layer processing. Instead, organic photosensitive layers are processed under milder conditions and then laminated to pre-fabricated electrodes, improving material quality and device efficiency while maintaining productive fabrication rates.
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 method enables the fabrication of more robust, reliable, and higher-efficiency organic photosensitive devices by optimizing processing conditions for each component, leading to improved performance and stability, as demonstrated by the successful fabrication of laminated solar cells with enhanced current density and efficiency.
Implementation Method 1
a first electrode on the first portion is coupled to the second portion to form a laminated photosensitive device
Data Source
AI summary
There is disclosed a modular lamination approach for processing organic photosensitive devices that allows the individual processing of device components, that once processed are brought together in a final step to make electrical contact. The disclosed method of preparing a laminated photosensitive device having at least one donor-acceptor heterojunction comprises: preparing a top electrode by depositing a functional material on a flexible substrate, such as an elastomer; optionally processing the functional material to obtain desired properties prior to lamination; preparing a bottom portion by depositing a second functional material over a substrate; optionally processing the second functional material to obtain desired properties prior to lamination; and coupling the top electrode to said bottom portion to form a laminated photosensitive device.