Lanthanide-Doped Layered Double Hydroxides for Solar Cell Efficiency
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Solution Overview
Problem
Current organic photovoltaic (OPV) technology faces inefficiencies in light absorption, charge separation, and charge transport, leading to suboptimal performance in solar energy conversion.
Innovation Solution
Development of hybrid composite nanomaterials, specifically lanthanide-doped layered double hydroxides with intercalated organic compounds, which act as light energy down-conversion materials and are used in a low-cost, one-pot hydrothermal synthesis process to enhance the performance of solar cells by increasing external quantum efficiency and power conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional organic photovoltaic technology is used, then manufacturing cost is low and flexibility is high, but light absorption efficiency is insufficient and power conversion efficiency is limited
Solution Approach 1:
The patent employs composite materials by integrating lanthanide-doped layered double hydroxide nanomaterials with organic photovoltaic components. The hybrid composite structure combines inorganic lanthanide compounds for light down-conversion with organic semiconductor materials for charge generation, creating a synergistic system that maintains the low-cost manufacturing advantage of organic PV while significantly enhancing light absorption and power conversion efficiency through the lanthanide-induced spectral conversion
Solution Approach 2:
The patent applies parameter changes by modifying the optical properties of the photovoltaic system through lanthanide doping. The lanthanide ions (such as Eu³⁺, Tb³⁺, Dy³⁺) introduce specific emission wavelengths that down-convert high-energy UV photons into visible light wavelengths matching the absorption spectrum of the organic semiconductor, thereby changing the effective spectral parameters and improving overall energy conversion efficiency
2Reliability
If complex multi-step synthesis processes are used for nanomaterial preparation, then material performance can be optimized, but synthesis time increases and waste generation increases
Solution Approach 1:
The patent merges multiple synthesis steps into a single hydrothermal process. The one-pot synthesis simultaneously achieves nanomaterial formation, lanthanide doping, and organic compound intercalation in one hydrothermal treatment step, eliminating sequential processing steps while maintaining controlled material performance through optimized reaction conditions (temperature, pressure, pH, and precursor ratios)
Solution Approach 2:
The hydrothermal synthesis process utilizes self-assembly mechanisms where the nanomaterials spontaneously form the desired layered double hydroxide structure with incorporated lanthanide ions and organic compounds. The system self-regulates crystal growth and phase formation under hydrothermal conditions, reducing the need for complex external control mechanisms and multiple processing steps
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
The hybrid composite nanomaterials significantly improve light absorption and charge transfer in solar cells, enhancing external quantum efficiency by up to 100% in the UV range and increasing power conversion efficiency by 2-5%, while maintaining temperature stability and transparency, thus overcoming the limitations of traditional OPV technology.
Implementation Method 1
a hydrotalcite like layered double hydroxide compound provided with one or more lanthanide elements inserted into the 2D layers... act as light energy down-conversion materials
Implementation Method 2
a low-cost, one-pot hydrothermal synthesis process
Data Source
AI summary
A hybrid composite nanomaterial comprising a hydrotalcite like layered double hydroxide compound provided with one or more lanthanide elements inserted into the 2D layers and one or more organic-inorganic (DONOR/ACCEPTOR) compounds, or acids or salts thereof, intercalated between them as shown in FIG. 1 and FIG. 31. The innovative co-axial design for encapsulating the active layer(s) of a hybrid organic-inorganic solar cell, together with the insertion of the hydrotalcite like nanocomposite, for light energy down and up conversion, thereby not only providing the active material more convertible energy, but also providing the opportunity to incorporate in situ the co-axial geometry or envisage a standalone pair of a Photoelectrochemical (PEC) and Fuel cell (FC), to work in parallel to the organic inorganic solar cell, or as standalone respectively.