Double Complex Salt Oligomers for Broad-Spectrum Light Absorption
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Solution Overview
Problem
Current organic solar cells (OSCs) face challenges in achieving high light absorption across the visible spectrum to near-infrared range and efficient exciton diffusion, leading to suboptimal energy conversion efficiency.
Innovation Solution
The use of oligomers formed from double complex salts, specifically comprising positively and negatively charged metal complexes, which exhibit pronounced metal-metal interactions, forming columnar structures that enhance light absorption and charge carrier mobility, thereby improving energy conversion efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional organic solar cell materials are used, then the device structure is simple, but light absorption across the visible spectrum to near-infrared range is insufficient
Solution Approach 1:
The patent employs composite materials by combining positively charged metal complexes with negatively charged metal complexes to form double complex salts. These composite structures enable broad-spectrum light absorption from visible to near-infrared range, directly addressing the insufficient light absorption of conventional materials while maintaining manageable device complexity through a systematic material design approach.
Solution Approach 2:
The patent utilizes parameter changes by modifying the electronic and structural parameters of metal complexes through ligand selection and metal center choice. By adjusting these parameters, the absorption spectrum is extended into the near-infrared range, and the materials achieve both high absorption coefficients and efficient exciton diffusion, resolving the contradiction between light absorption performance and material structure complexity.
2Productivity
If conventional absorber materials are used, then the manufacturing process is simple, but exciton diffusion efficiency is insufficient
Solution Approach 1:
The double complex salt structure combines two metal complexes with complementary properties: one providing high absorption coefficients and the other facilitating efficient exciton diffusion. This composite material design simultaneously improves energy conversion efficiency through enhanced light absorption and exciton transport, while the modular nature of the composite structure keeps the manufacturing process relatively simple.
Solution Approach 2:
The patent applies local quality by assigning different functional characteristics to different components within the double complex salt structure. One metal complex is optimized for light absorption while the other is optimized for exciton diffusion, allowing each component to excel at its specific function and collectively achieving high overall energy conversion efficiency without requiring complex device architecture.
3Illumination intensity
If high light absorption is achieved through conventional means, then absorption coefficient is improved, but charge carrier mobility remains insufficient
Solution Approach 1:
The double complex salt composite material resolves the contradiction between absorption coefficient and charge carrier mobility by combining two metal complexes with complementary strengths. The cationic complex provides high absorption coefficient while the anionic complex facilitates charge carrier mobility, allowing both parameters to be optimized simultaneously within the same material system without requiring separate functional layers.
Solution Approach 2:
The patent merges the functions of light absorption and charge carrier transport into a single double complex salt material. By combining two metal complexes with different primary functions into one integrated material, the system achieves both high absorption coefficient and sufficient charge carrier mobility simultaneously, eliminating the need for separate optimization of these properties through complex device architecture.
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 double complex salts with columnar structures achieve high molar extinction coefficients and improved charge carrier mobility, enabling efficient light absorption and exciton dissociation across a broad spectral range, enhancing the energy conversion efficiency of OSCs.
Implementation Method 1
achieve high light absorption across the visible spectrum to near-infrared range
Implementation Method 2
exhibit pronounced metal-metal interactions, forming columnar structures that enhance light absorption and charge carrier mobility
Implementation Method 3
improving energy conversion efficiency
Data Source
AI summary
The present invention pertains to the double complex salts in optoelectronic components, like organic diodes, organic transistors or organic lasers, in particular an organic solar cell (OSC, OPP) and in particular from oligomers built from charged metal complexes.