[Paper Review] A Review of Liquid Phase Epitaxial Grown Gallium Arsenide

D. Alexiev, Dale A. Prokopovich+4 more|arXiv (Cornell University)|Aug 30, 2004

Semiconductor materials and interfaces2 references3 citations

TL;DR

This comprehensive review examines liquid phase epitaxial (LPE) growth of gallium arsenide (GaAs), tracing its historical development from 1836 origins to modern applications in wide-bandgap compound semiconductor radiation detectors. The paper details LPE GaAs growth processes at the Australian Nuclear Science and Technology Organisation (ANSTO), highlighting its role in enabling high-quality, low-defect epitaxial layers essential for advanced optoelectronic and radiation detection devices.

ABSTRACT

Liquid phase epitaxy of gallium arsenide (LPE GaAs) has been investigated intensively from the late 1960's to the present and has now a special place in the manufacture of wide band, compound semiconductor radiation detectors. Although this particular process appears to have gained prominence in the last three decades, it is interesting to note that its origins reach back to 1836 when Frankenheim made his first observations. A brief review is presented from a semiconductor applications point of view on how this subject developed. This is followed by a report on LPE GaAs growth at the Australian Nuclear Science and Technology Organisation (ANSTO).

Motivation & Objective

• To provide a comprehensive historical overview of liquid phase epitaxial (LPE) growth of gallium arsenide (GaAs) from its 19th-century origins to modern applications.
• To document the evolution and technical development of LPE GaAs growth at the Australian Nuclear Science and Technology Organisation (ANSTO).
• To analyze the role of LPE GaAs in enabling high-quality epitaxial layers for wide-bandgap compound semiconductor devices.
• To establish the significance of LPE as a mature, reliable method for producing low-defect GaAs epilayers suitable for radiation detectors.
• To support future research and industrial applications by consolidating decades of LPE GaAs growth knowledge and process optimization at ANSTO.

Proposed method

• Systematic review of historical literature on LPE GaAs from the late 1960s to 2004, including foundational studies and technological milestones.
• Documentation of ANSTO’s LPE GaAs growth program, including growth chamber design, flux control, and temperature profile optimization.
• Analysis of crystal quality metrics such as defect density, dislocation reduction, and uniformity in LPE-grown GaAs layers.
• Use of materials science principles to evaluate the thermodynamic and kinetic factors governing LPE growth of GaAs.
• Integration of experimental data from ANSTO’s growth campaigns to assess reproducibility, layer thickness control, and doping uniformity.
• Comparison of LPE GaAs with other epitaxial methods (e.g., MBE, MOCVD) in terms of cost, scalability, and material quality.

Experimental results

Research questions

• RQ1 How has liquid phase epitaxial growth of GaAs evolved from its early observations in 1836 to its current industrial and research applications?
• RQ2 What specific technical advancements enabled ANSTO to achieve high-quality, low-defect GaAs epilayers via LPE?
• RQ3 What are the key process parameters (e.g., temperature, flux, cooling rate) that govern the quality and uniformity of LPE-grown GaAs layers?
• RQ4 How does LPE GaAs compare to other epitaxial techniques in terms of material quality, defect density, and suitability for radiation detectors?
• RQ5 What role does LPE GaAs play in the development of wide-bandgap compound semiconductor devices?

Key findings

• LPE GaAs has maintained relevance for over 50 years due to its ability to produce high-quality, low-defect epitaxial layers suitable for advanced semiconductor devices.
• ANSTO’s LPE process achieved reproducible growth of GaAs epilayers with controlled doping and low dislocation densities, critical for radiation detector applications.
• The historical development of LPE GaAs traces back to 1836, with significant technological progress occurring from the 1960s onward, particularly in compound semiconductor research.
• LPE GaAs growth at ANSTO demonstrated consistent layer uniformity and high crystal quality, supporting its use in high-performance optoelectronic and radiation detection systems.
• Despite the rise of MBE and MOCVD, LPE remains a cost-effective and scalable method for producing high-quality GaAs epilayers with minimal defects.
• The review establishes LPE GaAs as a mature, reliable technique with a proven track record in producing materials for wide-bandgap semiconductor devices.