A flexible, rapid response, hybrid inorganic–organic SnSe2–PEDOT:PSS bulk heterojunction based high-performance broadband photodetector

Kumaar Swamy Reddy, B. and Veeralingam, Sushmitha and Badhulika, Sushmee and et al, . (2022) A flexible, rapid response, hybrid inorganic–organic SnSe2–PEDOT:PSS bulk heterojunction based high-performance broadband photodetector. Materials Chemistry Frontiers, 6 (3). pp. 341-351. ISSN 2052-1537

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Abstract

Photodetectors based on inorganic semiconductors demonstrate superior responsivity, but their high thermal budget fabrication process is a serious impediment for emerging applications. Hybrid photodetectors based on organic-inorganic heterojunctions synergistically offer the solution-processability and tunability of organic semiconductors, along with the superior absorption coefficient and transport properties of inorganic materials. In this work, a broadband photodetector based on a bulk-heterojunction of hybrid organic-PEDOT:PSS/inorganic-SnSe2 and a subsequent vertical junction on flexible ITO-coated-PET is demonstrated. SnSe2 nanoflakes, synthesized via a facile hydrothermal method, exhibit absorption in both the visible and NIR spectra, and are made into a bulk heterojunction (BHJ) with PEDOT:PSS. The ITO layer exhibits absorption in the UV spectra, onto which the SnSe2-PEDOT:PSS bulk-heterojunction composite is deposited to form a vertical junction. The broadband photodetector exhibits quick response times of 16 ms, 221 ms and 274 ms and superior responsivities of 0.72 A W-1, 0.67 A W-1 and 0.69 A W-1 in the UV, Vis and NIR spectra, respectively. This superior responsivity of the photodetector is related to the enhanced interfacial area between SnSe2-PEDOT:PSS in the bulk-heterojunction, which leads to efficient electron-hole pair separation. Furthermore, the device is subjected to multiple bending cycles (∼3000) and minimal deviation in responsivity is observed. The facile and low-cost approach demonstrated in this work finds potential applications in novel flexible opto-electronic devices. This journal is © the Partner Organisations.

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IITH Creators:

IITH Creators	ORCiD
Badhulika, Sushmee	https://orcid.org/0000-0003-3237-3031

Item Type:

Article

Additional Information:

SB acknowledges financial assistance from Defence Research and Development Organisation (DRDO) grant DYSL-AST/CARS/ CONTRACT/20-21/02.

Uncontrolled Keywords:

Bulk heterojunction; High thermal; Hybrid inorganic-organic; Inorganic semiconductors; NIR spectrum; PEDOT/PSS; Performance; Rapid response; Responsivity; Vertical junctions

Subjects:

Others > Metallurgy Metallurgical Engineering
Electrical Engineering
Materials Engineering > Materials engineering

Divisions:

Department of Electrical Engineering
Department of Material Science Engineering

Depositing User:

. LibTrainee 2021

Date Deposited:

13 Jul 2022 12:23

Last Modified:

13 Jul 2022 12:23

URI:

http://raiithold.iith.ac.in/id/eprint/9654