A tetrathienopyrrole-based ladder-type donor polymer for high-performance organic near-infrared cavity detectors

Valkeneers, Kaat; Raymakers, Jorne; Liu, Quan; Vanderspikken, Jochen; Wang, Yuming; Kesters, Jurgen; Quill, Tyler James; Liu, Zhen; Van den Brande, Niko; Lutsen, Laurence; Vandewal, Koen; Maes, Wouter

doi:10.1039/d3mh01010d

Mater. Horiz.

2023

DOI: 10.1039/d3mh01010d

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A tetrathienopyrrole-based ladder-type donor polymer for high-performance organic near-infrared cavity detectors

Kaat Valkeneers,

Jorne Raymakers,

Quan Liu

et al.

Abstract: Organic semiconductors can afford detection at wavelengths beyond commercial silicon photodetectors. However, for each targeted near-infrared wavelength range, this requires individually optimized materials, which adds to the complexity and costs....

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Energy Level Tuning in Conjugated Donor Polymers by Chalcogen Exchange for Low Dark Current Organic Photodetectors

Rimmele,

Qiao,

Aniés

et al. 2024

ACS Materials Lett.

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The performance of organic photodetectors (OPDs) using conjugated polymer donors and molecular acceptors has improved rapidly, but many polymers are difficult to upscale due to their complex structures. This study examines two low-complexity thiophene copolymers with substituted benzooxadiazole (FO6-BO-T) or benzothiadiazole (FO6-T). Substituting sulfur with oxygen in FO6-BO-T increased its ionization energy without affecting the optical gap. When blended with the nonfullerene acceptor IDSe, FO6-BO-T showed a significantly lower dark current density (2.06•10 −9 A cm −2 at −2 V) compared to FO6-T. Grazing incidence wideangle X-ray scattering (GIWAXS) measurements demonstrated that pristine FO6-BO-T exhibited a more ordered morphology than FO6-T. However, blending resulted in a significant disruption to the ordered domains in both cases, with a loss of orientational order, suggesting that FO6-BO-T's improved performance is largely related to its increased ionization energy. This study demonstrates the potential of chalcogen atom engineering to enhance the performance of the OPD in scalable polymers.

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Energy Level Tuning in Conjugated Donor Polymers by Chalcogen Exchange for Low Dark Current Organic Photodetectors

Rimmele,

Qiao,

Aniés

et al. 2024

ACS Materials Lett.

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show abstract

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A tetrathienopyrrole-based ladder-type donor polymer for high-performance organic near-infrared cavity detectors

Abstract: Organic semiconductors can afford detection at wavelengths beyond commercial silicon photodetectors. However, for each targeted near-infrared wavelength range, this requires individually optimized materials, which adds to the complexity and costs....

Cited by 1 publication

References 38 publications

Energy Level Tuning in Conjugated Donor Polymers by Chalcogen Exchange for Low Dark Current Organic Photodetectors

Energy Level Tuning in Conjugated Donor Polymers by Chalcogen Exchange for Low Dark Current Organic Photodetectors

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