---
title: One step closer to efficient green LED devices
description: "A new study published in Nano Letters focuses on the efficient green emission from the novel material: wurtzite AlxIn1−xP nanowires."
image: https://blog.delmic.com/hubfs/green%20emission.png
---

###### [cathodoluminescence](https://blog.delmic.com/news/topic/cathodoluminescence), [SPARC](https://blog.delmic.com/news/topic/sparc), [LED](https://blog.delmic.com/news/topic/led), [paper review](https://blog.delmic.com/news/topic/paper-review) • 3

# One step closer to efficient green LED devices

[Delmic May 25, 2018](https://blog.delmic.com/news/author/delmic)

![green emission](https://blog.delmic.com/hs-fs/hubfs/green%20emission.png?width=1080&name=green%20emission.png)

In the last few years, LEDs (light-emitting diodes) have proved to be the future of the lighting systems, due to their efficiency, brightness, and longer lifetime.

However, the systematic efficiency drop in the yellow-green region, also known as the “green gap”, is a fundamental limitation for the LEDs and semiconductor laser devices.

In order to overcome this gap novel materials are needed. Researchers from the TU Eindhoven and AMOLF in Amsterdam have recently developed and investigated a promising new candidate: wurtzite (WZ) AlxIn1−xP nanowires. Their results are summarized in the [prestigious journal ](https://pubs.acs.org/doi/pdf/10.1021/acs.nanolett.8b00621)[*Nano Letters*](https://pubs.acs.org/doi/pdf/10.1021/acs.nanolett.8b00621).

The nanowire geometry, crystal structure and composition were examined using a variety of TEM techniques including HAADF STEM, electron diffraction, and EDS. Photoluminescence and [cathodoluminescence (CL)](https://www.delmic.com/sparc-cathodoluminescence-sem) were used to study the optical properties of the materials. The cathodoluminescence measurements, performed in [the SPARC](https://blog.delmic.com/3-outstanding-advantages-of-the-sparc-cathodoluminescence-system-video), were used to study nanoscale variations in emission due to local changes in composition, both in the lateral dimension as well as along the wire length. The results demonstrate strong room-temperature light emission from the infrared to the green range showing that this material may provide a viable route towards efficient green LED devices.

If you would like to know more about the possibilities of cathodoluminescence for LED characterization and research, make sure to read our application note on[ bulk and nanostructured Gallium Nitride-based LED materials](https://request.delmic.com/cathodoluminescence-bulk-nanostructured-gallium-nitride-based-led-materials-application-note).

### **References**

[1] Efficient Green Emission from Wurtzite AlxIn1–xP Nanowires L. Gagliano, M. Kruijsse, J. D. D. Schefold, A. Belabbes, M. A. Verheijen, S. Meuret, S. Koelling, A. Polman, F. Bechstedt, J.E.M. Haverkort, and E.P.A.M. Bakkers Nano Letters Article ASAP** **DOI: 10.1021/acs.nanolett.8b00621

#### Delmic

[![](https://blog.delmic.com/hs-fs/hubfs/2022_Delmic_M%26M%20Meeting%20Promo_Website.png?width=380&name=2022_Delmic_M%26M%20Meeting%20Promo_Website.png) ](https://blog.delmic.com/news/join-delmic-at-microscopy-microanalysis-mm-meeting-2022) [###### cathodoluminescence

## Join Delmic at Microscopy & MicroAnalysis (M&M) Meeting 2022

It’s official, Delmic is going to M&M 2022 in Portland, Oregon! You’ll find us at the biggest microscopy event of the year. We’ll be presenting our METEOR, ...

](https://blog.delmic.com/news/join-delmic-at-microscopy-microanalysis-mm-meeting-2022)

[![](https://blog.delmic.com/hs-fs/hubfs/Website/News/2022_CL_OTP%20Funding_Website.png?width=380&name=2022_CL_OTP%20Funding_Website.png) ](https://blog.delmic.com/news/open-technology-programme-funding) [###### cathodoluminescence

## Open Technology Programme (OTP) funding

We are delighted to announce that Delmic - CL Solutions is a part of the Open Technology Programme, granted by NWO. The project will look into a new ...

](https://blog.delmic.com/news/open-technology-programme-funding)

[![](https://blog.delmic.com/hs-fs/hubfs/Website/News/2022_CL_NWO%20Funding_Website.png?width=380&name=2022_CL_NWO%20Funding_Website.png) ](https://blog.delmic.com/news/nwo-funding-for-perovskite-solar-foil-consortium) [###### cathodoluminescence

## NWO funding for perovskite solar foil consortium

We are excited to announce that Delmic - CL Solutions will be part of the PerFoRM (Perovskite Foils by Roll-to-roll Manufacturing) consortium, funded by NWO's ...

](https://blog.delmic.com/news/nwo-funding-for-perovskite-solar-foil-consortium)