Effect of hydrogen chloride etching on carrier recombination processes of indium phosphide nanowires

Nanoscale
Xiaojun SuA Yartsev

Abstract

Introduction of in situ HCl etching to an epitaxial growth process has been shown to suppress radial growth and improve the morphology and optical properties of nanowires. In this paper, we investigate the dynamics of photo-generated charge carriers in a series of indium phosphide nanowires grown with varied HCl fluxes. Time resolved photo-induced luminescence, transient absorption and time resolved terahertz spectroscopy were employed to investigate charge trapping and recombination processes in the nanowires. Since the excitation photons generate charges predominantly in less than a half length of the nanowires, we can selectively assess the charge carrier dynamics at their top and bottom. We found that the photoluminescence decay is dominated by the decay of the mobile hole population due to trapping, which is affected by the HCl etching. The hole trapping rate is in general faster at the top of the nanowires than at the bottom. In contrast, electrons remain highly mobile until they recombine non-radiatively with the trapped holes. The slowest hole trapping as well as the least efficient non-radiative recombination was recorded for etching using the HCl molar fraction of χHCl = 5.4 × 10-5.

References

Jul 15, 1988·Physical Review. B, Condensed Matter·M D Stiles, D R Hamann
Mar 15, 1990·Physical Review. B, Condensed Matter·M D Stiles, D R Hamann
Jun 9, 2001·Science·M H HuangP Yang
Aug 10, 2006·Nano Letters·Jiming BaoZ F Ren
Aug 25, 2007·Nanomedicine·Fernando PatolskyCharles M Lieber
Feb 13, 2008·Nano Letters·Clint J NovotnyPaul K L Yu
Feb 16, 2008·Nano Letters·Jiming BaoLars Samuelson
Apr 14, 2010·Nano Letters·M D Schroer, J R Petta
Dec 14, 2011·Nano Letters·Jesper WallentinMagnus T Borgström
May 30, 2012·Nanotechnology·D JacobssonM T Borgström
Sep 12, 2012·Nano Letters·Hannah J JoyceMichael B Johnston
Mar 5, 2013·Nanotechnology·Thuy T T VuErik P A M Bakkers
Apr 27, 2013·Nanotechnology·Hannah J JoyceMichael B Johnston
Aug 1, 2013·Nano Letters·Yingchao CuiErik P A M Bakkers
Nov 26, 2014·Nanotechnology·Alexander BergMagnus T Borgström
Oct 1, 2015·Nano Letters·Wei ZhangArkady Yartsev
Oct 8, 2016·Nanotechnology·Wei ZhangArkady Yartsev
Jun 28, 2017·Nano Letters·Wei ZhangArkady Yartsev
Dec 24, 2018·Micromachines·Pranav AmbhorkarDong-Il Dan Cho

❮ Previous
Next ❯

Citations

Sep 13, 2020·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Xianshao ZouWei Dang
Jun 19, 2020·Optics Express·Xiaoming YuanChennupati Jagadish
May 19, 2021·Chemical Society Reviews·Shao-Hai LiYi-Jun Xu
May 30, 2020·ACS Applied Materials & Interfaces·Xianshao ZouArkady Yartsev

❮ Previous
Next ❯

Methods Mentioned

BETA
electron microscopy
transmission electron microscopy

Software Mentioned

COMSOL
TRTS
TA
TRPL

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.