Organic Solar Cell One-Step Buffer Photoactive Layer Formation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for manufacturing organic solar cells face challenges in producing a buffer layer and photoactive layer in a one-step process suitable for large-area modules, as they require non-conducting constituents and involve complex ultrathin film formation.
Innovation Solution
A method involving a solution with a phase separation solvent having a boiling point of 200°C to 230°C and density of 1 g/cm³ to 5 g/cm³, applied to a first electrode, followed by heat treatment to form both layers, and a second electrode, enabling self-phase separation and efficient large-area module production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a one-step process is used to manufacture buffer layer and photoactive layer through self-phase separation, then manufacturing time and process complexity are reduced, but the method is not usable in large-area module solar cells due to requirements for non-conducting constituents and ultrathin film formation
Solution Approach 1:
The patent changes the physical-chemical parameters of the solvent system by introducing a phase separation solvent with specific boiling point (200-230°C) and density (1.0 g/cm³ or higher). This parameter change enables the solvent to induce self-phase separation of buffer and photoactive materials during drying, allowing one-step manufacturing to work for large-area modules without requiring non-conducting constituents or ultrathin film formation.
Solution Approach 2:
The phase separation solvent acts as an intermediary that mediates between the buffer material and photoactive material. During the drying process, the solvent's phase separation properties cause the buffer and photoactive materials to automatically separate into distinct layers, eliminating the need for separate manufacturing steps while ensuring proper layer formation for large-area modules.
2Ease of manufacture
If conventional solvents are used in one-step process, then manufacturing is simpler, but smooth self-phase separation of buffer and photoactive layers cannot be achieved
Solution Approach 1:
The patent specifies precise parameter ranges for the phase separation solvent: boiling point of 200-230°C and density of 1.0 g/cm³ or higher. These parameter changes ensure that the solvent maintains appropriate viscosity and evaporation characteristics during coating, enabling smooth self-phase separation of the buffer and photoactive layers while keeping the manufacturing process simple and one-step.
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 approach allows for smooth self-phase separation of the buffer and photoactive layers, enhancing photoconversion efficiency and reducing process time and costs, while enabling the formation of these layers in a single step for large-area modules.
Implementation Method 1
the solvent includes a phase separation solvent for self-phase separation of the buffer layer and the photoactive layer, wherein the phase separation solvent has a boiling point of 200°C to 230°C and density of 1 g/cm³
Implementation Method 2
forming a buffer layer and a photoactive layer through coating of applying the solution on the first electrode and heat treating the result
Data Source
Figure 1
Figure 2
AI summary
The present specification provides an organic solar cell, and a method for manufacturing the same.