Titanium Oxide Laminate Formation for Perovskite Solar Cells
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Solution Overview
Problem
Current methods for producing perovskite solar cells lack an efficient and effective method for creating a laminate that serves as both a light-transmissive electrode layer and an electron transport layer.
Innovation Solution
A laminate producing method involving cathode polarization of a light-transmissive electrode layer in a treatment solution containing a Ti component, forming a titanium oxide layer as the electron transport layer, with specific Ti content and current density conditions, followed by the sequential formation of other layers in a perovskite solar cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods are used to produce perovskite solar cells, then the basic structure can be achieved, but there is no efficient method for creating a laminate that serves as both light-transmissive electrode layer and electron transport layer
Solution Approach 1:
The patent combines the light-transmissive electrode layer and electron transport layer into a single laminate structure. The titanium oxide layer serves dual functions as both the electron transport layer and as part of the light-transmissive electrode assembly, eliminating the need for separate formation processes and reducing manufacturing complexity.
Solution Approach 2:
The titanium oxide layer performs multiple functions simultaneously: it acts as the electron transport layer for charge carrier transport, serves as part of the light-transmissive electrode structure, and provides a foundation for subsequent perovskite layer formation. This multi-functionality simplifies the overall device architecture.
2Manufacturing precision
If a titanium oxide layer is formed on the light-transmissive electrode layer, then the electron transport layer is created, but the process requires specific Ti content and current density conditions
Solution Approach 1:
The patent specifies precise parameter ranges for the titanium oxide layer formation: Ti content in the treatment solution between 0.004-1.300 mol/L and current density between 0.01-1.00 A/dm². By optimizing these parameters, the method achieves reliable formation of the electron transport layer with appropriate thickness and properties, balancing manufacturing precision with process simplicity.
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 production of a perovskite solar cell with improved performance, as evidenced by the formation of a functional titanium oxide layer and subsequent layers, resulting in a power conversion efficiency of 2.59% with short-circuit current, open-circuit voltage, and fill factor measurements.
Implementation Method 1
subjecting a member serving as the light-transmissive electrode layer to cathode polarization in a treatment solution containing a Ti component to thereby form, on the member, a titanium oxide layer serving as the electron transport layer
Data Source
AI summary
Provided is a novel method for producing a laminate that serves as an electron transport layer and an optically transparent electrode layer of a perovskite solar cell having, in the following order, an optically transparent electrode layer, an electron transport layer, a perovskite crystal layer, a hole transport layer, and a current collecting layer. The method involves forming a titanium oxide layer that serves as the electron transport layer on a member that serves as the optically transparent electrode layer by utilizing said member for cathode polarization in a treatment liquid containing a Ti component.