A trifluoromethyl group-incorporated spacer in 2D perovskite-based photodetectors with good responsivity and a big Pb–I–Pb bond angle: the first example of an aliphatic linearly-chained spacer forming non-classical hydrophobic hydrogen bonding

Gurumallappa Gurumallappa; Norman Lu; Yi-De Chen; Yu-Ching Lin; Yueh-Fang Hsiao; Pin-Yu Liu; Meng-Lin Tsai

doi:10.1039/D5TC00443H

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A trifluoromethyl group-incorporated spacer in 2D perovskite-based photodetectors with good responsivity and a big Pb–I–Pb bond angle: the first example of an aliphatic linearly-chained spacer forming non-classical hydrophobic hydrogen bonding†‡

Gurumallappa Gurumallappa,

^ab Norman Lu,

*^abc Yi-De Chen,

^a Yu-Ching Lin,

^a Yueh-Fang Hsiao,

^a Pin-Yu Liu

^a and Meng-Lin Tsai

Author affiliations

* Corresponding authors

^a Institute of Organic and Polymeric Materials, Taipei, Taiwan, Republic of China

^b Graduate Institute of Energy and Optoelectronic Materials and, Taipei, Taiwan, Republic of China

^c Department of Molecular Science and Engineering, National Taipei University of Technology, Taipei 106, Taiwan, Republic of China
E-mail: normanlu@mail.ntut.edu.tw

^d Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 106335, Taiwan, Republic of China

Abstract

For the first time, we report a trifluoromethyl group-incorporated aliphatic linearly-chained 2D (3F-PAH)₂PbI₄ halide perovskite (HP) with a low bandgap of 2.28 eV, minimal Pb–I–Pb bond angle distortion (∼153.5°) and a unique fluorous phase. The photodetector (PD) demonstrates good responsivity (600 mA W⁻¹) and fast response/recovery times (74/98 ms) at 5 V under 450 nm light, making it ideal for next-generation optoelectronic devices.

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DOI: https://doi.org/10.1039/D5TC00443H
Article type: Communication
Submitted: 02 Feb 2025
Accepted: 21 Mar 2025
First published: 21 Mar 2025

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J. Mater. Chem. C, 2025,13, 7912-7917

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A trifluoromethyl group-incorporated spacer in 2D perovskite-based photodetectors with good responsivity and a big Pb–I–Pb bond angle: the first example of an aliphatic linearly-chained spacer forming non-classical hydrophobic hydrogen bonding

G. Gurumallappa, N. Lu, Y. Chen, Y. Lin, Y. Hsiao, P. Liu and M. Tsai, J. Mater. Chem. C, 2025, 13, 7912 DOI: 10.1039/D5TC00443H

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Journal of Materials Chemistry C

A trifluoromethyl group-incorporated spacer in 2D perovskite-based photodetectors with good responsivity and a big Pb–I–Pb bond angle: the first example of an aliphatic linearly-chained spacer forming non-classical hydrophobic hydrogen bonding†‡

Abstract

Supplementary files

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A trifluoromethyl group-incorporated spacer in 2D perovskite-based photodetectors with good responsivity and a big Pb–I–Pb bond angle: the first example of an aliphatic linearly-chained spacer forming non-classical hydrophobic hydrogen bonding

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