Related Experiment Video
Updated: Mar 30, 2026
08:21
Synthesis of In37P20O2CR51 Clusters and Their Conversion to InP Quantum Dots
Published on: May 7, 2019
10.5K
Crystal-structure-dependent photoluminescence from InP nanowires
M Mattila1, T Hakkarainen, M Mulot
1Optoelectronics Laboratory, Helsinki University of Technology, PO BOX 3500, FIN-02015 HUT, Finland.
Nanotechnology
|November 13, 2015
Summary
Indium phosphide (InP) nanowires grown on InP substrates exhibit a unique blue-shifted photoluminescence. This shift is attributed to the wurtzite crystal structure, not quantum confinement effects.
Area of Science:
- Materials Science
- Nanotechnology
- Semiconductor Physics
Background:
- Indium phosphide (InP) nanowires are crucial for optoelectronic applications.
- Controlling nanowire crystal structure impacts their optical properties.
Purpose of the Study:
- Investigate the formation and photoluminescence (PL) of InP nanowires.
- Determine the cause of PL blue-shift in vertically aligned InP nanowires.
Main Methods:
- Metal-organic vapor phase epitaxy (MOVPE) for InP nanowire growth.
- Scanning electron microscopy (SEM) for morphology analysis.
- X-ray diffraction (XRD) and transmission electron microscopy (TEM) for structural characterization.
Main Results:
- Vertically aligned InP nanowires were grown on InP(111)B substrates.
- A significant PL blue-shift (approx. 80 meV) was observed compared to the substrate.
- The blue-shift was correlated with nanowire orientation and attributed to the wurtzite crystal structure.
Conclusions:
- The wurtzite crystal structure in vertically aligned InP nanowires causes a PL blue-shift.
- This finding differs from typical quantum confinement effects in smaller diameter nanowires.
Related Concept Videos
01:23Photoluminescence: Fluorescence and Phosphorescence
5.1K
Photoluminescence is a process where a molecule absorbs light energy and re-emits it in the form of light. This phenomenon occurs when a substance absorbs photons, promoting its electrons to higher energy level excited states, followed by a relaxation process in which the electrons return to their original ground state energy levels and emit light. Photoluminescence is widely observed in various materials, including semiconductors, and organic and inorganic compounds.
A pair of electrons in a...
A pair of electrons in a...
5.1K
01:14Photoluminescence: Applications
1.2K
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
1.2K