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Indium Phosphide

Updated: 2026-07-19

Overview

Indium Phosphide (InP) is a III-V compound semiconductor renowned for its high electron mobility and direct bandgap, making it indispensable in advanced optoelectronics and high-frequency devices. It is synthesized through controlled reactions of indium and phosphorus under high temperatures. Maoming, a key industrial hub in China, produces InP for global markets, often in crystalline or epitaxial wafer forms. InP's unique properties enable its use in cutting-edge technologies, including fiber-optic communication systems and 5G infrastructure. Its ability to emit and detect light efficiently positions it as a critical material for photonic integrated circuits (PICs) and quantum computing applications.

Physical and Chemical Properties

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InP crystals exhibit a zincblende lattice structure, contributing to their mechanical stability and thermal conductivity (~68 W/mยทK). The material's direct bandgap (1.35 eV at room temperature) allows efficient light emission, while its high saturated electron velocity (2.5ร—10^7 cm/s) supports ultra-fast electronic devices. Chemically, InP is stable under inert atmospheres but oxidizes in air above 400ยฐC. It reacts with acids (e.g., hydrochloric acid) and must be handled in controlled environments. Its insolubility in water minimizes environmental risks, though particulate forms require careful containment due to toxicity concerns.

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Main Applications

InP dominates the optoelectronics sector, serving as the substrate for edge-emitting lasers (EELs) and vertical-cavity surface-emitting lasers (VCSELs) in data centers. Its compatibility with heterostructures (e.g., InGaAs/InP) enables high-performance photodiodes for LiDAR and medical imaging. In microelectronics, InP-based high-electron-mobility transistors (HEMTs) are pivotal for millimeter-wave applications, including satellite communications and radar systems. Emerging uses include terahertz generators and qubit platforms in quantum computing, leveraging InP's spin coherence properties.

Safety and Storage

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InP poses health risks if inhaled as dust or ingested, requiring NIOSH-approved respirators and fume hoods during processing. Spills should be contained using non-combustible absorbents (e.g., vermiculite) and disposed of as hazardous waste under local regulations. Storage mandates airtight containers with inert gas purging to prevent oxidation. Bulk shipments typically use double-walled, vacuum-sealed packaging to maintain purity. Facilities must ensure MSDS compliance and train staff in emergency response protocols for InP exposure.

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B2B Procurement Guide

Bulk buyers should prioritize suppliers with ISO 9001 certification and traceable material pedigrees. Key specifications include dislocation density (<500 cmโปยฒ for epitaxial wafers) and carrier concentration (undoped: <10^16 cmโปยณ). Negotiate contracts with flexibility for quarterly price adjustments, as indium price volatility affects InP costs. For R&D projects, consider pre-cut wafers (2-inch to 6-inch diameters) with custom doping profiles. Logistics must guarantee temperature-controlled transit to prevent crystal stress.

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