3 years ago

A Solar-Blind UV Detector Based on Graphene-Microcrystalline Diamond Heterojunctions

A Solar-Blind UV Detector Based on Graphene-Microcrystalline Diamond Heterojunctions
Liwei Lin, Chen Yang, Yumeng Liu, Minsong Wei, Kaiyuan Yao, Xining Zang
An ultraviolet detector is demonstrated through a whole-wafer, thin diamond film transfer process to realize the heterojunction between graphene and microcrystalline diamond (MCD). Conventional direct transfer processes fail to deposit graphene onto the top surface of the MCD film. However, it is found that the 2 µm thick MCD diamond film can be easily peeled off from the growth silicon substrate to expose its smooth backside for the graphene transfer process for high-quality graphene/MCD heterojunctions. A vertical graphene/MCD/metal structure is constructed as the photodiode device using graphene as the transparent top electrode for solar-blind ultraviolet sensing with high responsivity and gain factor. As such, this material system and device architecture could serve as the platform for next-generation optoelectronic systems. A solar-blind ultraviolet (UV) detector is accomplished through a whole-wafer, thin diamond film transfer process. By utilizing the smooth backside of the microcrystalline diamond (MCD) film, the UV detector based on the high-quality graphene/MCD heterojunctions is realized for the first time. Based on the graphene/MCD/metal structure, a photodiode device is achieved for solar-blind ultraviolet sensing with high responsivity and gain factor.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/smll.201701328

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.