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High Dynamic Range CsFAPbI 3 Perovskite Photodetectors with 12.7 MHz Bandwidth.

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Title: High Dynamic Range CsFAPbI 3 Perovskite Photodetectors with 12.7 MHz Bandwidth.
Authors: Majeed, Abdul Mannan1 (AUTHOR) gediminas.kreiza@ff.vu.lt, Stanionytė, Sandra2 (AUTHOR), Kreiza, Gediminas1 (AUTHOR), Ščajev, Patrik1,2 (AUTHOR) patrik.scajev@ff.vu.lt
Source: Materials (1996-1944). Apr2026, Vol. 19 Issue 7, p1315. 14p.
Subjects: Photodetectors, Bandwidths, Spin coating, Visible spectra, X-ray diffraction, Imaging systems, Perovskite, Photosensitivity
Abstract: We develop CsxFA1−xPbI3 perovskite photodetectors with varying Cs content in the x = 0.05–0.25 range to identify the most stable cubic-lattice perovskite composition for visible-light photodetection. The perovskite layers were deposited by the spin-coating technique on a nickel oxide p-type contact and then were covered with C60/Ag electron contact to obtain a vertical pin diode structure. X-ray diffraction (XRD) and scanning electron microscopy (SEM) measurements show that x = 0.1–0.2 provides the most stable lattice and pinhole-free perovskite layers. The photocurrents are linear in an extremely wide 1 nW–10 mW excitation power range, providing photoresponsivity of 0.28 A/W at 532 nm (green light), similar to that of Si photodiodes. The testing of the photodetectors using picosecond pulses provided their rise times and fall times. The x = 0.2 composition provided the shortest rise time values of 27.5 ns, leading to a detector modulation bandwidth of 12.7 MHz. This indicates that this perovskite composition is suitable for replacing silicon photodetectors in cost-efficient light detection systems for imaging and light communication applications such as Li-Fi. [ABSTRACT FROM AUTHOR]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: High Dynamic Range CsFAPbI 3 Perovskite Photodetectors with 12.7 MHz Bandwidth.
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  Data: <searchLink fieldCode="AR" term="%22Majeed%2C+Abdul+Mannan%22">Majeed, Abdul Mannan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> gediminas.kreiza@ff.vu.lt</i><br /><searchLink fieldCode="AR" term="%22Stanionytė%2C+Sandra%22">Stanionytė, Sandra</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kreiza%2C+Gediminas%22">Kreiza, Gediminas</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ščajev%2C+Patrik%22">Ščajev, Patrik</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> patrik.scajev@ff.vu.lt</i>
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Apr2026, Vol. 19 Issue 7, p1315. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Photodetectors%22">Photodetectors</searchLink><br /><searchLink fieldCode="DE" term="%22Bandwidths%22">Bandwidths</searchLink><br /><searchLink fieldCode="DE" term="%22Spin+coating%22">Spin coating</searchLink><br /><searchLink fieldCode="DE" term="%22Visible+spectra%22">Visible spectra</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Imaging+systems%22">Imaging systems</searchLink><br /><searchLink fieldCode="DE" term="%22Perovskite%22">Perovskite</searchLink><br /><searchLink fieldCode="DE" term="%22Photosensitivity%22">Photosensitivity</searchLink>
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  Data: We develop CsxFA1−xPbI3 perovskite photodetectors with varying Cs content in the x = 0.05–0.25 range to identify the most stable cubic-lattice perovskite composition for visible-light photodetection. The perovskite layers were deposited by the spin-coating technique on a nickel oxide p-type contact and then were covered with C60/Ag electron contact to obtain a vertical pin diode structure. X-ray diffraction (XRD) and scanning electron microscopy (SEM) measurements show that x = 0.1–0.2 provides the most stable lattice and pinhole-free perovskite layers. The photocurrents are linear in an extremely wide 1 nW–10 mW excitation power range, providing photoresponsivity of 0.28 A/W at 532 nm (green light), similar to that of Si photodiodes. The testing of the photodetectors using picosecond pulses provided their rise times and fall times. The x = 0.2 composition provided the shortest rise time values of 27.5 ns, leading to a detector modulation bandwidth of 12.7 MHz. This indicates that this perovskite composition is suitable for replacing silicon photodetectors in cost-efficient light detection systems for imaging and light communication applications such as Li-Fi. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.3390/ma19071315
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 14
        StartPage: 1315
    Subjects:
      – SubjectFull: Photodetectors
        Type: general
      – SubjectFull: Bandwidths
        Type: general
      – SubjectFull: Spin coating
        Type: general
      – SubjectFull: Visible spectra
        Type: general
      – SubjectFull: X-ray diffraction
        Type: general
      – SubjectFull: Imaging systems
        Type: general
      – SubjectFull: Perovskite
        Type: general
      – SubjectFull: Photosensitivity
        Type: general
    Titles:
      – TitleFull: High Dynamic Range CsFAPbI 3 Perovskite Photodetectors with 12.7 MHz Bandwidth.
        Type: main
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          Name:
            NameFull: Majeed, Abdul Mannan
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            NameFull: Stanionytė, Sandra
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            NameFull: Kreiza, Gediminas
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            NameFull: Ščajev, Patrik
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            – D: 01
              M: 04
              Text: Apr2026
              Type: published
              Y: 2026
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              Value: 19
            – Type: issue
              Value: 7
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            – TitleFull: Materials (1996-1944)
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