Polymer nanocomposite spectrum down-convertors for UV sensing

Abdalla M. Darwish, Sergey S. Sarkisov, Darayas N. Patel, Simeon Wilson, Rachel Jackson, Nichols Moody, Paolo Mele, Giovanna Latronico, Brent Koplitz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We report on polymer nanocomposite films with spectrum down-converting properties that can be transferred using pulsed laser deposition (PLD) on silicon avalanche photodiodes (APD) for responsive and fast UV sensing. The proposed spectrum down-convertors use two types of nanoparticles (NPs) embedded in a colorless polyimide matrix: semiconductor CdSe/ZnS core-shell quantum dots (QDs) and the QDs made of rare-earth (RE) doped lead halide perovskites CsPbX3 (X stands for Br and Cl). These NPs have efficient down-conversion of UV radiation into visible and near-infrared (NIR) light matching spectral responsivity of Si APD with the photoluminescence quantum yield (PLQY) from 50 to 190%. Once an APD detects visible/NIR signal, it responds with an electronic gain >106 and a response time of ∼10 ns thus making rapid and strong UV sensing possible. Both types of NPs have strong absorption of UV and additionally protect the APD from degradation caused by UV radiation. CdSe/ZnS core-shell QDs convert UV spectrum in visible with a red peak at 631 nm using the down-shifting mechanism. The perovskite QDs doped with the ion of Yb3+ emitted in NIR with a peak at 980 nm due to the mechanism of down-conversion or quantum cutting. Both types of NPs were embedded in a polymer matrix and PLD deposited on a transparent substrate. We describe the results of characterization of the down-convertors using dynamic light scattering, X-ray diffraction, optical photoluminescence spectroscopy, and the photo-voltaic characteristics of silicon photodetectors integrated with the down-convertors.

Original languageEnglish
Title of host publicationPhotonic Fiber and Crystal Devices
Subtitle of host publicationAdvances in Materials and Innovations in Device Applications XVI
EditorsShizhuo Yin, Ruyan Guo
PublisherSPIE
ISBN (Electronic)9781510654426
DOIs
Publication statusPublished - 2022
EventPhotonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVI 2022 - San Diego, United States
Duration: 2022 Aug 21 → …

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12229
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferencePhotonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XVI 2022
Country/TerritoryUnited States
CitySan Diego
Period22/8/21 → …

Keywords

  • avalanche photodetectors
  • perovskites
  • pulsed laser deposition
  • semiconductor quantum dots
  • solar-blind communication

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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