Laplace current deep level transient spectroscopy measurements of defect states in methylammonium lead bromide single crystals

John W. Rosenberg; Matshisa J. Legodi; Yevgeny Rakita; David Cahen; Mmantsae Diale

doi:10.1063/1.4995970

Laplace current deep level transient spectroscopy measurements of defect states in methylammonium lead bromide single crystals

John W. Rosenberg, Matshisa J. Legodi, Yevgeny Rakita, David Cahen, Mmantsae Diale

Research output: Contribution to journal › Article › peer-review

49 Scopus citations

Abstract

We present a measurement of the energies and capture cross-sections of defect states in methylammonium lead bromide (MAPbBr₃) single crystals. Using Laplace current deep level transient spectroscopy (I-DLTS), two prominent defects were observed with energies 0.17 eV and 0.20 eV from the band edges, and further I-DLTS measurements confirmed that these two defects are bulk defects. These results show qualitative agreement with theoretical predictions, whereby all of the observed defects behave as traps rather than as generation-recombination centers. These results provide one explanation for the high efficiencies and open-circuit voltages obtained from devices made with lead halide perovskites.

Original language	English
Article number	145701
Journal	Journal of Applied Physics
Volume	122
Issue number	14
DOIs	https://doi.org/10.1063/1.4995970
State	Published - 14 Oct 2017
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2017 Author(s).

Funding

We thank Professor Franc¸ois D. Auret for many fruitful discussions regarding DLTS, along with much helpful advice regarding the experimental procedures and Professor Gary Hodes for helpful discussions regarding the interpretation of these results. We thank Hadar Kaslasi for providing several crystals that we used to test our diode configuration. At the WIS this work was supported in part by the Israel Ministry of Science’s Tashtiot program. At U Pretoria this work was supported in part by the NRF Nanotechnology Flagship Program (Project No. 88021). D.C. holds the Sylvia and Rowland Schaefer Chair in Energy Research.

Funders	Funder number
Ministry of Science’s
NRF Nanotechnology Flagship Program	88021
Ministry of science and technology, Israel

Access to Document

10.1063/1.4995970

Cite this

@article{5e537dcaf70441628168c950fa254fd7,

title = "Laplace current deep level transient spectroscopy measurements of defect states in methylammonium lead bromide single crystals",

abstract = "We present a measurement of the energies and capture cross-sections of defect states in methylammonium lead bromide (MAPbBr3) single crystals. Using Laplace current deep level transient spectroscopy (I-DLTS), two prominent defects were observed with energies 0.17 eV and 0.20 eV from the band edges, and further I-DLTS measurements confirmed that these two defects are bulk defects. These results show qualitative agreement with theoretical predictions, whereby all of the observed defects behave as traps rather than as generation-recombination centers. These results provide one explanation for the high efficiencies and open-circuit voltages obtained from devices made with lead halide perovskites.",

author = "Rosenberg, {John W.} and Legodi, {Matshisa J.} and Yevgeny Rakita and David Cahen and Mmantsae Diale",

note = "Publisher Copyright: {\textcopyright} 2017 Author(s).",

year = "2017",

month = oct,

day = "14",

doi = "10.1063/1.4995970",

language = "אנגלית",

volume = "122",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

number = "14",

}

TY - JOUR

T1 - Laplace current deep level transient spectroscopy measurements of defect states in methylammonium lead bromide single crystals

AU - Rosenberg, John W.

AU - Legodi, Matshisa J.

AU - Rakita, Yevgeny

AU - Cahen, David

AU - Diale, Mmantsae

PY - 2017/10/14

Y1 - 2017/10/14

N2 - We present a measurement of the energies and capture cross-sections of defect states in methylammonium lead bromide (MAPbBr3) single crystals. Using Laplace current deep level transient spectroscopy (I-DLTS), two prominent defects were observed with energies 0.17 eV and 0.20 eV from the band edges, and further I-DLTS measurements confirmed that these two defects are bulk defects. These results show qualitative agreement with theoretical predictions, whereby all of the observed defects behave as traps rather than as generation-recombination centers. These results provide one explanation for the high efficiencies and open-circuit voltages obtained from devices made with lead halide perovskites.

AB - We present a measurement of the energies and capture cross-sections of defect states in methylammonium lead bromide (MAPbBr3) single crystals. Using Laplace current deep level transient spectroscopy (I-DLTS), two prominent defects were observed with energies 0.17 eV and 0.20 eV from the band edges, and further I-DLTS measurements confirmed that these two defects are bulk defects. These results show qualitative agreement with theoretical predictions, whereby all of the observed defects behave as traps rather than as generation-recombination centers. These results provide one explanation for the high efficiencies and open-circuit voltages obtained from devices made with lead halide perovskites.

UR - http://www.scopus.com/inward/record.url?scp=85031492432&partnerID=8YFLogxK

U2 - 10.1063/1.4995970

DO - 10.1063/1.4995970

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:85031492432

SN - 0021-8979

VL - 122

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 14

M1 - 145701

ER -

Laplace current deep level transient spectroscopy measurements of defect states in methylammonium lead bromide single crystals

Abstract

Bibliographical note

Funding

Access to Document

Other files and links

Fingerprint

Cite this