High-speed colour-converting photodetector with all-inorganic CsPbBr<sub>3</sub> perovskite nanocrystals for ultraviolet light communication

Chun Hong Kang; Ibrahim Dursun; Guangyu Liu; Lutfan Sinatra; Xiaobin Sun; Meiwei Kong; Jun Pan; Partha Maity; Ee-Ning Ooi; Tien Khee Ng; Omar F. Mohammed; Osman M. Bakr; Boon S. Ooi

doi:10.1038/s41377-019-0204-4

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High-speed colour-converting photodetector with all-inorganic CsPbBr₃ perovskite nanocrystals for ultraviolet light communication

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- High-speed colour-converting photodetector with all-inorganic CsPbBr₃ perovskite nanocrystals for ultraviolet light communication
- High-speed colour-converting photodetector with all-inorganic CsPbBr₃ perovskite nanocrystals for ultraviolet light communication
- LSA 2019年8卷第5期页码：881-892
- Affiliations：
  
  1.Photonics Laboratory, Division of Computer, Electrical, and Mathematical Sciences and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
  2.Division of Physical Science and Engineering, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
  3.Quantum Solutions LLC, Thuwal 23955-6900, Kingdom of Saudi Arabia
- Author bio：
  
  Osman M. Bakr (osman.bakr@kaust.edu.sa)
  Boon S. Ooi(boon.ooi@kaust.edu.sa)
- Funds：
- DOI：10.1038/s41377-019-0204-4
  中图分类号：
- 纸质出版日期：2019，
  
  网络出版日期：2019-10-16，
  
  收稿日期：2019-02-28，
  
  修回日期：2019-09-25，
  
  录用日期：2019-09-30
- Accepted：
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High-speed colour-converting photodetector with all-inorganic CsPbBr₃ perovskite nanocrystals for ultraviolet light communication[J]. LSA, 2019,8(5):881-892.

Kang, C. H. et al. High-speed colour-converting photodetector with all-inorganic CsPbBr₃ perovskite nanocrystals for ultraviolet light communication. Light: Science & Applications, 8, 881-892 (2019).
High-speed colour-converting photodetector with all-inorganic CsPbBr₃ perovskite nanocrystals for ultraviolet light communication[J]. LSA, 2019,8(5):881-892. DOI： 10.1038/s41377-019-0204-4.

Kang, C. H. et al. High-speed colour-converting photodetector with all-inorganic CsPbBr₃ perovskite nanocrystals for ultraviolet light communication. Light: Science & Applications, 8, 881-892 (2019). DOI： 10.1038/s41377-019-0204-4.

摘要

Abstract

Optical wireless communication (OWC) using the ultra-broad spectrum of the visible-to-ultraviolet (UV) wavelength region remains a vital field of research for mitigating the saturated bandwidth of radio-frequency (RF) communication. However

the lack of an efficient UV photodetection methodology hinders the development of UV-based communication. The key technological impediment is related to the low UV-photon absorption in existing silicon photodetectors

which offer low-cost and mature platforms. To address this technology gap

we report a hybrid Si-based photodetection scheme by incorporating CsPbBr

perovskite nanocrystals (NCs) with a high photoluminescence quantum yield (PLQY) and a fast photoluminescence (PL) decay time as a UV-to-visible colour-converting layer for high-speed solar-blind UV communication. The facile formation of drop-cast CsPbBr

perovskite NCs leads to a high PLQY of up to ~73% and strong absorption in the UV region. With the addition of the NC layer

a nearly threefold improvement in the responsivity and an increase of ~25% in the external quantum efficiency (EQE) of the solar-blind region compared to a commercial silicon-based photodetector were observed. Moreover

time-resolved photoluminescence measurements demonstrated a decay time of 4.5 ns under a 372-nm UV excitation source

thus elucidating the potential of this layer as a fast colour-converting layer. A high data rate of up to 34 Mbps in solar-blind communication was achieved using the hybrid CsPbBr

-silicon photodetection scheme in conjunction with a 278-nm UVC light-emitting diode (LED). These findings demonstrate the feasibility of an integrated high-speed photoreceiver design of a composition-tuneable perovskite-based phosphor and a low-cost silicon-based photodetector for UV communication.

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High-speed colour-converting photodetector with all-inorganic CsPbBr3 perovskite nanocrystals for ultraviolet light communication

High-speed colour-converting photodetector with all-inorganic CsPbBr3 perovskite nanocrystals for ultraviolet light communication

DOI：10.1038/s41377-019-0204-4

摘要

Abstract

关键词

Keywords

references

High-speed colour-converting photodetector with all-inorganic CsPbBr₃ perovskite nanocrystals for ultraviolet light communication

High-speed colour-converting photodetector with all-inorganic CsPbBr₃ perovskite nanocrystals for ultraviolet light communication