Alkyl Indium Sesquichloride Synthesis via Ionic Liquid Medium
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Solution Overview
Problem
Current processes for preparing indium-containing precursors for MOCVD face challenges such as low yield, selectivity, and purity, along with environmental concerns and high costs, particularly due to the use of organic solvents and complex reaction steps, which impede the production of high-quality semiconductor layers.
Innovation Solution
A process for preparing alkyl indium sesquichloride with high yield and purity, avoiding organic solvents and involving a reaction between indium and an alkyl chloride, allowing for the production of indium-containing precursors suitable for MOCVD, with a focus on cost-effectiveness and environmental sustainability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional processes using organic solvents and complex reaction steps are used, then indium-containing precursors can be prepared, but the yield, selectivity, and purity are low, and environmental impact and costs are high
Solution Approach 1:
The patent changes the chemical parameters of the reaction system by replacing organic solvents with an ionic liquid medium and modifying the reaction conditions (temperature, pressure, catalysts) to achieve high purity indium-containing precursors without organic solvent residues, thereby resolving the contradiction between manufacturing precision and environmental harm
Solution Approach 2:
The patent uses ionic liquids as an inert reaction medium that prevents unwanted side reactions and solvent contamination, providing a clean reaction environment that achieves high purity products while avoiding the environmental problems associated with volatile organic solvents
2Quantity of substance
If conventional processes with multiple reaction steps are used, then indium-containing precursors can be prepared, but the process is time-consuming and costly
Solution Approach 1:
The patent combines multiple reaction steps into a streamlined process by using ionic liquids that enable direct synthesis and simplify work-up procedures, reducing the overall process time while maintaining or improving yield through enhanced reaction efficiency and selectivity
Solution Approach 2:
The ionic liquid medium provides self-cleaning properties where the product can be easily separated from the reaction medium through simple filtration or decantation, and the ionic liquid can be reused, thereby reducing process time and eliminating the need for extensive purification 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 process achieves high yield and purity of alkyl indium sesquichloride, enabling the production of indium-containing precursors with improved semiconductor layer quality, reducing environmental impact and production costs, and facilitating efficient MOCVD processes.
Implementation Method 1
reacting indium with an alkyl donor to form compound (A), wherein the alkyl donor is an alkyl chloride (RCl)
Data Source
AI summary
The invention relates to a process for the cost-effective and environmentally responsible preparation of alkyl indium sesquichloride in high yield and with high selectivity and purity. The alkyl indium sesquichloride prepared in accordance with the invention is particularly suitable, also as a result of its high purity and yield, for preparation of indium-containing precursors in accordance with demand, in high yield and with high selectivity and purity. As a result of the high purity, the indium-containing precursors that are preparable are particularly suitable for metal-organic chemical vapor deposition (MOCVD) or metal-organic vapor phase epitaxy (MOVPE). The novel process according to the invention is characterized by the improved execution of the process, in particular by rapid process control. Owing to targeted and extensive use of raw materials that are inexpensive and have a low level of environmental pollution, the process is also suitable for use on an industrial scale.