Extracting the key electrical properties of semiconductors using optical pump terahertz probe spectroscopy

Conference item

We have used optical-pump-terahertz-probe spectroscopy (OPTPS) to study a range of novel of semiconductors including III-V nanowires and metal halide perovskites. We show that OPTPs allows key figures of merit to be extracted in a non-contact manner, including charge mobility, surface recombination velocity, and doping density. Furthermore, the technique allows charge recombination dynamics to be followed on a picosecond time-scale. This knowledge is useful in the design of new optoelectronic devices from lasers to solar cells as well as for the development and optimisation of new semiconductors.

Authors: Johnston, M

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: IEEE
• Host title: 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2016
• Volume: 2016-November
• Publication date: 2016-11-28
• Acceptance date: 2016-06-15
• DOI: 10.1109/IRMMW-THz.2016.7758732
• EISSN: 2162-2035
• ISSN: 2162-2027
• ISBN: 9781467384858
• Keywords: doping; photovoltaic cells; nanowires; radiative recombination; semiconductor device measurement; photoconductivity; spectroscopy