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High responsivity and response speed single-layer mixed-cation lead mixed-halide perovskite photodetectors based on nanogap electrodes manufactured on large-area rigid and flexible substrates

High responsivity and response speed single-layer mixed-cation lead mixed-halide perovskite photodetectors based on nanogap electrodes manufactured on large-area rigid and flexible substrates
High responsivity and response speed single-layer mixed-cation lead mixed-halide perovskite photodetectors based on nanogap electrodes manufactured on large-area rigid and flexible substrates

Mixed-cation lead mixed-halide perovskites are employed as the photoactive material in single-layer solution-processed photodetectors fabricated with coplanar asymmetric nanogap Al–Au and indium tin oxide–Al electrodes. The nanogap electrodes, bearing an interelectrode distance of ≈10 nm, are patterned via adhesion lithography, a simple, low-cost, and high-throughput technique. Different electrode shapes and sizes are demonstrated on glass and flexible plastic substrates, effectively engineering the device architecture, and, along with perovskite film and material optimization, paving the way toward devices with tunable operational characteristics. The optimized coplanar nanogap junction perovskite photodetectors show responsivities up to 33 A W−1, specific detectivity on the order of 1011 Jones, and response times below 260 ns, while retaining a low dark current (0.3 nA) under −2 V reverse bias. These values outperform the vast majority of perovskite photodetectors reported so far, while avoiding the complicated fabrication steps involved in conventional multilayer device structures. This work highlights the promising potential of the proposed asymmetric nanogap electrode architecture for application in the field of flexible optoelectronics.

image sensors, metal halide perovskites, nanopatterning, photodiodes
1616-301X
Georgiadou, Dimitra G.
84977176-3678-4fb3-a3dd-2044a49c853b
Lin, Yen Hung
3c4dde5c-95a3-4cc2-b5e3-46d2598b7e89
Lim, Jongchul
3ee69916-2194-4aae-944d-4373bbbd7674
Ratnasingham, Sinclair
e0b7f5f1-0ae3-4d21-99a3-a4998fa46706
McLachlan, Martyn A.
8cdefe50-9bd2-4ed5-81da-c5ebbfd9e2b1
Snaith, Henry J.
12799605-fd5f-4333-8c8c-270e2d291015
Anthopoulos, Thomas D.
d6ee9390-d991-4277-a721-030f22d614c9
Georgiadou, Dimitra G.
84977176-3678-4fb3-a3dd-2044a49c853b
Lin, Yen Hung
3c4dde5c-95a3-4cc2-b5e3-46d2598b7e89
Lim, Jongchul
3ee69916-2194-4aae-944d-4373bbbd7674
Ratnasingham, Sinclair
e0b7f5f1-0ae3-4d21-99a3-a4998fa46706
McLachlan, Martyn A.
8cdefe50-9bd2-4ed5-81da-c5ebbfd9e2b1
Snaith, Henry J.
12799605-fd5f-4333-8c8c-270e2d291015
Anthopoulos, Thomas D.
d6ee9390-d991-4277-a721-030f22d614c9

Georgiadou, Dimitra G., Lin, Yen Hung, Lim, Jongchul, Ratnasingham, Sinclair, McLachlan, Martyn A., Snaith, Henry J. and Anthopoulos, Thomas D. (2019) High responsivity and response speed single-layer mixed-cation lead mixed-halide perovskite photodetectors based on nanogap electrodes manufactured on large-area rigid and flexible substrates. Advanced Functional Materials, 29 (28), [1901371]. (doi:10.1002/adfm.201901371).

Record type: Article

Abstract

Mixed-cation lead mixed-halide perovskites are employed as the photoactive material in single-layer solution-processed photodetectors fabricated with coplanar asymmetric nanogap Al–Au and indium tin oxide–Al electrodes. The nanogap electrodes, bearing an interelectrode distance of ≈10 nm, are patterned via adhesion lithography, a simple, low-cost, and high-throughput technique. Different electrode shapes and sizes are demonstrated on glass and flexible plastic substrates, effectively engineering the device architecture, and, along with perovskite film and material optimization, paving the way toward devices with tunable operational characteristics. The optimized coplanar nanogap junction perovskite photodetectors show responsivities up to 33 A W−1, specific detectivity on the order of 1011 Jones, and response times below 260 ns, while retaining a low dark current (0.3 nA) under −2 V reverse bias. These values outperform the vast majority of perovskite photodetectors reported so far, while avoiding the complicated fabrication steps involved in conventional multilayer device structures. This work highlights the promising potential of the proposed asymmetric nanogap electrode architecture for application in the field of flexible optoelectronics.

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More information

e-pub ahead of print date: 8 May 2019
Published date: 11 July 2019
Keywords: image sensors, metal halide perovskites, nanopatterning, photodiodes

Identifiers

Local EPrints ID: 439828
URI: http://eprints.soton.ac.uk/id/eprint/439828
ISSN: 1616-301X
PURE UUID: 0f40cdbf-b039-4eb5-9445-3c4e12c7341d
ORCID for Dimitra G. Georgiadou: ORCID iD orcid.org/0000-0002-2620-3346

Catalogue record

Date deposited: 05 May 2020 16:30
Last modified: 07 Oct 2020 02:27

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Contributors

Author: Yen Hung Lin
Author: Jongchul Lim
Author: Sinclair Ratnasingham
Author: Martyn A. McLachlan
Author: Henry J. Snaith
Author: Thomas D. Anthopoulos

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