Enhanced-Performance Self-Powered Solar-Blind UV-C Photodetector Based on n-ZnO Quantum Dots Functionalized by p-CuO Micro-pyramids

Norah M. Alwadai; Somak Mitra; Mohamed N. Hedhili; Hadeel Alamoudi; Bin Xin; Naresh Alaal; Iman S. Roqan

doi:10.1021/acsami.1c03424

Enhanced-Performance Self-Powered Solar-Blind UV-C Photodetector Based on n-ZnO Quantum Dots Functionalized by p-CuO Micro-pyramids

Norah M. Alwadai, Somak Mitra, Mohamed N. Hedhili, Hadeel Alamoudi, Bin Xin, Naresh Alaal, Iman S. Roqan

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

Smart solar-blind UV-C band photodetectors suffer from low responsivity in a self-powered mode. Here, we address this issue by fabricating a novel enhanced solar-blind UV-C photodetector array based on solution-processed n-ZnO quantum dots (QDs) functionalized by p-CuO micro-pyramids. Self-assembled catalyst-free p-CuO micro-pyramid arrays are fabricated on a pre-ablated Si substrate by pulsed laser deposition without a need for a catalyst layer or seeding, while the solution-processed n-ZnO QDs are synthesized by the femtosecond-laser ablation in liquid technique. The photodetector is fabricated by spray-coating ZnO QDs on a CuO micro-pyramid array. The photodetector performance is optimized via a p-n junction structure as both p-ZnO QDs and p-CuO micro-pyramid layers are characterized by wide band gap energies. Two photodetectors (with and without CuO micro-pyramids) are fabricated to show the role of p-CuO in enhancing the device performance. The n-ZnO QD/p-CuO micro-pyramid/Si photodetector is characterized by a superior photo-responsivity of ∼956 mA/W at 244 nm with a faster photoresponse (

Original language	English (US)
Journal	ACS Applied Materials & Interfaces
DOIs	https://doi.org/10.1021/acsami.1c03424
State	Published - Jul 8 2021

ASJC Scopus subject areas

General Materials Science

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10.1021/acsami.1c03424

https://repository.kaust.edu.sa/bitstream/10754/670105/1/acsami.1c03424.pdf

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@article{c73b988bdbda4d91a6f9f4b1c604a5d0,

title = "Enhanced-Performance Self-Powered Solar-Blind UV-C Photodetector Based on n-ZnO Quantum Dots Functionalized by p-CuO Micro-pyramids",

abstract = "Smart solar-blind UV-C band photodetectors suffer from low responsivity in a self-powered mode. Here, we address this issue by fabricating a novel enhanced solar-blind UV-C photodetector array based on solution-processed n-ZnO quantum dots (QDs) functionalized by p-CuO micro-pyramids. Self-assembled catalyst-free p-CuO micro-pyramid arrays are fabricated on a pre-ablated Si substrate by pulsed laser deposition without a need for a catalyst layer or seeding, while the solution-processed n-ZnO QDs are synthesized by the femtosecond-laser ablation in liquid technique. The photodetector is fabricated by spray-coating ZnO QDs on a CuO micro-pyramid array. The photodetector performance is optimized via a p-n junction structure as both p-ZnO QDs and p-CuO micro-pyramid layers are characterized by wide band gap energies. Two photodetectors (with and without CuO micro-pyramids) are fabricated to show the role of p-CuO in enhancing the device performance. The n-ZnO QD/p-CuO micro-pyramid/Si photodetector is characterized by a superior photo-responsivity of ∼956 mA/W at 244 nm with a faster photoresponse (",

author = "Alwadai, {Norah M.} and Somak Mitra and Hedhili, {Mohamed N.} and Hadeel Alamoudi and Bin Xin and Naresh Alaal and Roqan, {Iman S.}",

note = "KAUST Repository Item: Exported on 2021-07-12 Acknowledged KAUST grant number(s): BAS/1/1319-01-01 Acknowledgements: The authors thank KAUST for financial support. This work was supported by the base fund (BAS/1/1319-01-01). N.A. and I.S.R. gratefully acknowledge the supercomputing facility at the King Abdullah University of Science and Technology(KAUST) for providing the computational resources to carry out this research work.",

year = "2021",

month = jul,

day = "8",

doi = "10.1021/acsami.1c03424",

language = "English (US)",

journal = "ACS Applied Materials & Interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

}

TY - JOUR

T1 - Enhanced-Performance Self-Powered Solar-Blind UV-C Photodetector Based on n-ZnO Quantum Dots Functionalized by p-CuO Micro-pyramids

AU - Alwadai, Norah M.

AU - Mitra, Somak

AU - Hedhili, Mohamed N.

AU - Alamoudi, Hadeel

AU - Xin, Bin

AU - Alaal, Naresh

AU - Roqan, Iman S.

N1 - KAUST Repository Item: Exported on 2021-07-12 Acknowledged KAUST grant number(s): BAS/1/1319-01-01 Acknowledgements: The authors thank KAUST for financial support. This work was supported by the base fund (BAS/1/1319-01-01). N.A. and I.S.R. gratefully acknowledge the supercomputing facility at the King Abdullah University of Science and Technology(KAUST) for providing the computational resources to carry out this research work.

PY - 2021/7/8

Y1 - 2021/7/8

N2 - Smart solar-blind UV-C band photodetectors suffer from low responsivity in a self-powered mode. Here, we address this issue by fabricating a novel enhanced solar-blind UV-C photodetector array based on solution-processed n-ZnO quantum dots (QDs) functionalized by p-CuO micro-pyramids. Self-assembled catalyst-free p-CuO micro-pyramid arrays are fabricated on a pre-ablated Si substrate by pulsed laser deposition without a need for a catalyst layer or seeding, while the solution-processed n-ZnO QDs are synthesized by the femtosecond-laser ablation in liquid technique. The photodetector is fabricated by spray-coating ZnO QDs on a CuO micro-pyramid array. The photodetector performance is optimized via a p-n junction structure as both p-ZnO QDs and p-CuO micro-pyramid layers are characterized by wide band gap energies. Two photodetectors (with and without CuO micro-pyramids) are fabricated to show the role of p-CuO in enhancing the device performance. The n-ZnO QD/p-CuO micro-pyramid/Si photodetector is characterized by a superior photo-responsivity of ∼956 mA/W at 244 nm with a faster photoresponse (

AB - Smart solar-blind UV-C band photodetectors suffer from low responsivity in a self-powered mode. Here, we address this issue by fabricating a novel enhanced solar-blind UV-C photodetector array based on solution-processed n-ZnO quantum dots (QDs) functionalized by p-CuO micro-pyramids. Self-assembled catalyst-free p-CuO micro-pyramid arrays are fabricated on a pre-ablated Si substrate by pulsed laser deposition without a need for a catalyst layer or seeding, while the solution-processed n-ZnO QDs are synthesized by the femtosecond-laser ablation in liquid technique. The photodetector is fabricated by spray-coating ZnO QDs on a CuO micro-pyramid array. The photodetector performance is optimized via a p-n junction structure as both p-ZnO QDs and p-CuO micro-pyramid layers are characterized by wide band gap energies. Two photodetectors (with and without CuO micro-pyramids) are fabricated to show the role of p-CuO in enhancing the device performance. The n-ZnO QD/p-CuO micro-pyramid/Si photodetector is characterized by a superior photo-responsivity of ∼956 mA/W at 244 nm with a faster photoresponse (

UR - http://hdl.handle.net/10754/670105

UR - https://pubs.acs.org/doi/10.1021/acsami.1c03424

U2 - 10.1021/acsami.1c03424

DO - 10.1021/acsami.1c03424

M3 - Article

C2 - 34236856

SN - 1944-8244

JO - ACS Applied Materials & Interfaces

JF - ACS Applied Materials & Interfaces

ER -

Enhanced-Performance Self-Powered Solar-Blind UV-C Photodetector Based on n-ZnO Quantum Dots Functionalized by p-CuO Micro-pyramids

Abstract

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