Publication detail

Electrode Spacing as a Determinant of the Output Performance of Planar-Type Photodetectors Based on Methylammonium Lead Bromide Perovskite Single Crystals

GAVRANOVIĆ, S. POSPÍŠIL, J. ZMEŠKAL, O. NOVÁK, V. VANÝSEK, P. ČÁSTKOVÁ, K. CIHLÁŘ, J. WEITER, M.

Original Title

Electrode Spacing as a Determinant of the Output Performance of Planar-Type Photodetectors Based on Methylammonium Lead Bromide Perovskite Single Crystals

Type

journal article in Web of Science

Language

English

Original Abstract

Methylammonium lead bromide is a very perspective hybrid semiconductor material, suitable for high-sensitive, filter-free photodetection of electromagnetic radiation. Herein, we studied the effect of electrode spacing on the output performance and stability of planar-type photodetectors based on high-quality NAPbBr, single crystals. Such crystals, as large as 4.5X4.5X1.2 mm(3) were synthesized via the inverse temperature crystallization method and were further used for the fabrication of planar Au/MAPbBr(3)/Au photodetectors with variable electrode spacing (in the range between 125 and 25 mu m). We report that the electrode spacing has a profound impact on photocurrent densities and key detector parameters (responsivity R, external quantum efficiency EQE, and specific detectivity D*). In the studied fivefold electrode spacing, the photocurrent density increased over 4 times, with decreasing active area of the devices. This effect is attributed to intrinsic photocurrent amplification. Based on the transient photocurrent measurements and calculated key parameters, we determined the device sample with the best output performance. The champion sample with an electrode spacing of 50 mu m exhibited great detection ability, especially for a low light intensity of 200 nWcm(-2), for which we calculated the R of 19.55 A W-1, EQE of 4253%, and D* of 3.42 X 10(-12) Jones (cm Hz(1/2) W-1). Moreover, the functional stability of this device showed a minimal reduction of photodetection ability after 2000 cycles, which makes it very promising for the next generation of optoelectronic devices.

Keywords

perovskites; methylammonium lead bromide; photodetector; electrode spacing; responsivity; external quantum efficiency; detectivity

Authors

GAVRANOVIĆ, S.; POSPÍŠIL, J.; ZMEŠKAL, O.; NOVÁK, V.; VANÝSEK, P.; ČÁSTKOVÁ, K.; CIHLÁŘ, J.; WEITER, M.

Released

4. 5. 2022

Publisher

AMERICAN CHEMICAL SOCIETY

Location

WASHINGTON

ISBN

1944-8252

Periodical

ACS applied materials & interfaces

Year of study

14

Number

17

State

United States of America

Pages from

20159

Pages to

20167

Pages count

9

URL

https://pubs.acs.org/doi/10.1021/acsami.1c24362

BibTex

@article{BUT178385,
  author="Stevan {Gavranović} and Jan {Pospíšil} and Oldřich {Zmeškal} and Vítězslav {Novák} and Petr {Vanýsek} and Klára {Částková} and Jaroslav {Cihlář} and Martin {Weiter}",
  title="Electrode Spacing as a Determinant of the Output Performance of Planar-Type Photodetectors Based on Methylammonium Lead Bromide Perovskite Single Crystals",
  journal="ACS applied materials & interfaces",
  year="2022",
  volume="14",
  number="17",
  pages="20159--20167",
  doi="10.1021/acsami.1c24362",
  issn="1944-8252",
  url="https://pubs.acs.org/doi/10.1021/acsami.1c24362"
}