Stable perovskite based photodetector in impedance and capacitance mode

Tahseen A. Qasuria, Shahid Alam, Khasan S. Karimov, Noshin Fatima, Yahya S. Alharthi, Hamad F. Alharbi, Nabeel H. Alharthi, N. Amin, Md Akhtaruzzaman

Research output: Contribution to journalArticle

Abstract

Nowadays perovskite emerges as a promising photosensitive material for next-generation solution-processed devices. Perovskite-based solar cells degrade in ambient conditions up to some extent, after which they are discarded. In our work, we are using reusing the degraded cells as a high-performance stable perovskite-based photodetector. The symmetry of the detector is FTO/PEDOT:PSS/Perovskite/PC61BM/CdS/Ag showing sensitivity to light with respect to (w.r.t) impedance and capacitance. To enhance the excitons generation and absorption of light, the electron transport layer of cadmium sulfide along with PC61BM is selected and PEDOT:PSS layer is used for hole transportation. Atomic force microscopy, X-ray diffraction, and UV-absorption spectrum were obtained to study the surface morphology, composition, and absorption of the perovskite layer. The electric parameters within the frequency range 100 Hz to 200 kHz of samples under the effect of light were investigated. Experimental results showed that with the change in light intensity from dark to 325 W/m2, the highest impedance and capacitance were observed at 100 Hz. The impedance sensitivity is −126.154 kΩ m2/W and the uppermost capacitance sensitivity w.r.t light intensity is 6.77 pF m2/W. Frequency-impedance and capacitance relationships and sensitivities were also measured. The results showed that in the range from 100 Hz to 200 kHz the maximum impedance sensitivity is −343.37 Ω/Hz in dark condition. While the capacitance sensitivity was highest when light intensity was 325 W/m2 (−37.27 pF/kHz), respectively. We attribute these observations due to the generation of electron-hole pairs under light and by the increase of their concentration, by the presence of the built-in capacitance and possible frequency dependence of the mobility of the charges.

Original languageEnglish
Article number102699
JournalResults in Physics
Volume15
DOIs
Publication statusPublished - Dec 2019

Fingerprint

photometers
capacitance
impedance
sensitivity
luminous intensity
cadmium sulfides
solar cells
frequency ranges
excitons
atomic force microscopy
absorption spectra
detectors
symmetry
cells
diffraction
electrons
x rays

Keywords

  • Capacitance mode
  • Frequency
  • Hybrid organic-inorganic
  • Impedance mode
  • Perovskite
  • Photodetector

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Qasuria, T. A., Alam, S., Karimov, K. S., Fatima, N., Alharthi, Y. S., Alharbi, H. F., ... Akhtaruzzaman, M. (2019). Stable perovskite based photodetector in impedance and capacitance mode. Results in Physics, 15, [102699]. https://doi.org/10.1016/j.rinp.2019.102699

Stable perovskite based photodetector in impedance and capacitance mode. / Qasuria, Tahseen A.; Alam, Shahid; Karimov, Khasan S.; Fatima, Noshin; Alharthi, Yahya S.; Alharbi, Hamad F.; Alharthi, Nabeel H.; Amin, N.; Akhtaruzzaman, Md.

In: Results in Physics, Vol. 15, 102699, 12.2019.

Research output: Contribution to journalArticle

Qasuria, TA, Alam, S, Karimov, KS, Fatima, N, Alharthi, YS, Alharbi, HF, Alharthi, NH, Amin, N & Akhtaruzzaman, M 2019, 'Stable perovskite based photodetector in impedance and capacitance mode', Results in Physics, vol. 15, 102699. https://doi.org/10.1016/j.rinp.2019.102699
Qasuria TA, Alam S, Karimov KS, Fatima N, Alharthi YS, Alharbi HF et al. Stable perovskite based photodetector in impedance and capacitance mode. Results in Physics. 2019 Dec;15. 102699. https://doi.org/10.1016/j.rinp.2019.102699
Qasuria, Tahseen A. ; Alam, Shahid ; Karimov, Khasan S. ; Fatima, Noshin ; Alharthi, Yahya S. ; Alharbi, Hamad F. ; Alharthi, Nabeel H. ; Amin, N. ; Akhtaruzzaman, Md. / Stable perovskite based photodetector in impedance and capacitance mode. In: Results in Physics. 2019 ; Vol. 15.
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