5 years ago

Bias-Controlled Spectral Response in GaN/AlN Single-Nanowire Ultraviolet Photodetectors

Bias-Controlled Spectral Response in GaN/AlN Single-Nanowire Ultraviolet Photodetectors
Maria Spies, Eva Monroy, Martin Eickhoff, Jörg Schörmann, Pascal Hille, Jonas Lähnemann, Jakub Polaczyński, Bruno Gayral, Martien I. den Hertog
We present a study of GaN single-nanowire ultraviolet photodetectors with an embedded GaN/AlN superlattice. The heterostructure dimensions and doping profile were designed in such a way that the application of positive or negative bias leads to an enhancement of the collection of photogenerated carriers from the GaN/AlN superlattice or from the GaN base, respectively, as confirmed by electron beam-induced current measurements. The devices display enhanced response in the ultraviolet A (≈ 330–360 nm)/B (≈ 280–330 nm) spectral windows under positive/negative bias. The result is explained by correlation of the photocurrent measurements with scanning transmission electron microscopy observations of the same single nanowire and semiclassical simulations of the strain and band structure in one and three dimensions.

Publisher URL: http://dx.doi.org/10.1021/acs.nanolett.7b01118

DOI: 10.1021/acs.nanolett.7b01118

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.