Visualizing Buried Local Carrier Diffusion in Halide Perovskite Crystals via Two-Photon Microscopy

Camille Stavrakas; Géraud Delport; Ayan A. Zhumekenov; Miguel Anaya; Rosemonde Chahbazian; Osman Bakr; Edward S. Barnard; Samuel D. Stranks

doi:10.1021/acsenergylett.9b02244

Visualizing Buried Local Carrier Diffusion in Halide Perovskite Crystals via Two-Photon Microscopy

Camille Stavrakas, Géraud Delport, Ayan A. Zhumekenov, Miguel Anaya, Rosemonde Chahbazian, Osman Bakr, Edward S. Barnard, Samuel D. Stranks

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

35 Scopus citations

Abstract

Halide perovskites have shown great potential for light emission and photovoltaic applications due to their remarkable electronic properties. Although the device performances are promising, they are still limited by microscale heterogeneities in their photophysical properties. Here, we study the impact of these heterogeneities on the diffusion of charge carriers, which are processes crucial for efficient collection of charges in light-harvesting devices. A photoluminescence tomography technique is developed in a confocal microscope using one- A nd two-photon excitation to distinguish between local surface and bulk diffusion of charge carriers in methylammonium lead bromide single crystals. We observe a large dispersion of local diffusion coefficients with values between 0.3 and 2 cm2·s-1 depending on the trap density and the morphological environment- A distribution that would be missed from analogous macroscopic or surface measurements. This work reveals a new framework to understand diffusion pathways, which are extremely sensitive to local properties and buried defects.

Original language	English (US)
Pages (from-to)	117-123
Number of pages	7
Journal	ACS Energy Letters
Volume	5
Issue number	1
DOIs	https://doi.org/10.1021/acsenergylett.9b02244
State	Published - Nov 27 2019

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: A.A.Z. and O.M.B. gratefully acknowledge the funding support from King Abdullah University of Science and Technology (KAUST). Work at the Molecular Foundry was supported by the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02- 05CH11231. C.S. thanks the EPSRC (Nano-Doctoral Training Centre), the Cambridge Trust, and a Winton Graduate
Exchange Scholarship for funding. This project has received funding from the European Research Council (ERC) underthe European Union’s Horizon 2020 research and innovation programme (Grant Agreement Number 756962). S.D.S. acknowledges support from the Royal Society and Tata Group (UF150033). G.D. acknowledges the Royal Society for funding through a Newton International Fellowship. M.A. acknowledges funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No.841386. The authors thank the EPSRC for funding

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acsenergylett.9b02244

https://repository.kaust.edu.sa/bitstream/10754/660673/1/Preprintfile1.pdf

Cite this

@article{2c3dcf4157284fb0a6701f27ecbcae67,

title = "Visualizing Buried Local Carrier Diffusion in Halide Perovskite Crystals via Two-Photon Microscopy",

abstract = "Halide perovskites have shown great potential for light emission and photovoltaic applications due to their remarkable electronic properties. Although the device performances are promising, they are still limited by microscale heterogeneities in their photophysical properties. Here, we study the impact of these heterogeneities on the diffusion of charge carriers, which are processes crucial for efficient collection of charges in light-harvesting devices. A photoluminescence tomography technique is developed in a confocal microscope using one- A nd two-photon excitation to distinguish between local surface and bulk diffusion of charge carriers in methylammonium lead bromide single crystals. We observe a large dispersion of local diffusion coefficients with values between 0.3 and 2 cm2·s-1 depending on the trap density and the morphological environment- A distribution that would be missed from analogous macroscopic or surface measurements. This work reveals a new framework to understand diffusion pathways, which are extremely sensitive to local properties and buried defects.",

author = "Camille Stavrakas and G{\'e}raud Delport and Zhumekenov, {Ayan A.} and Miguel Anaya and Rosemonde Chahbazian and Osman Bakr and Barnard, {Edward S.} and Stranks, {Samuel D.}",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: A.A.Z. and O.M.B. gratefully acknowledge the funding support from King Abdullah University of Science and Technology (KAUST). Work at the Molecular Foundry was supported by the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02- 05CH11231. C.S. thanks the EPSRC (Nano-Doctoral Training Centre), the Cambridge Trust, and a Winton Graduate Exchange Scholarship for funding. This project has received funding from the European Research Council (ERC) underthe European Union{\textquoteright}s Horizon 2020 research and innovation programme (Grant Agreement Number 756962). S.D.S. acknowledges support from the Royal Society and Tata Group (UF150033). G.D. acknowledges the Royal Society for funding through a Newton International Fellowship. M.A. acknowledges funding from the European Union{\textquoteright}s Horizon 2020 research and innovation programme under the Marie Sk{\l}odowska-Curie Grant Agreement No.841386. The authors thank the EPSRC for funding",

year = "2019",

month = nov,

day = "27",

doi = "10.1021/acsenergylett.9b02244",

language = "English (US)",

volume = "5",

pages = "117--123",

journal = "ACS Energy Letters",

issn = "2380-8195",

publisher = "American Chemical Society",

number = "1",

}

TY - JOUR

T1 - Visualizing Buried Local Carrier Diffusion in Halide Perovskite Crystals via Two-Photon Microscopy

AU - Stavrakas, Camille

AU - Delport, Géraud

AU - Zhumekenov, Ayan A.

AU - Anaya, Miguel

AU - Chahbazian, Rosemonde

AU - Bakr, Osman

AU - Barnard, Edward S.

AU - Stranks, Samuel D.

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: A.A.Z. and O.M.B. gratefully acknowledge the funding support from King Abdullah University of Science and Technology (KAUST). Work at the Molecular Foundry was supported by the Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02- 05CH11231. C.S. thanks the EPSRC (Nano-Doctoral Training Centre), the Cambridge Trust, and a Winton Graduate Exchange Scholarship for funding. This project has received funding from the European Research Council (ERC) underthe European Union’s Horizon 2020 research and innovation programme (Grant Agreement Number 756962). S.D.S. acknowledges support from the Royal Society and Tata Group (UF150033). G.D. acknowledges the Royal Society for funding through a Newton International Fellowship. M.A. acknowledges funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No.841386. The authors thank the EPSRC for funding

PY - 2019/11/27

Y1 - 2019/11/27

N2 - Halide perovskites have shown great potential for light emission and photovoltaic applications due to their remarkable electronic properties. Although the device performances are promising, they are still limited by microscale heterogeneities in their photophysical properties. Here, we study the impact of these heterogeneities on the diffusion of charge carriers, which are processes crucial for efficient collection of charges in light-harvesting devices. A photoluminescence tomography technique is developed in a confocal microscope using one- A nd two-photon excitation to distinguish between local surface and bulk diffusion of charge carriers in methylammonium lead bromide single crystals. We observe a large dispersion of local diffusion coefficients with values between 0.3 and 2 cm2·s-1 depending on the trap density and the morphological environment- A distribution that would be missed from analogous macroscopic or surface measurements. This work reveals a new framework to understand diffusion pathways, which are extremely sensitive to local properties and buried defects.

AB - Halide perovskites have shown great potential for light emission and photovoltaic applications due to their remarkable electronic properties. Although the device performances are promising, they are still limited by microscale heterogeneities in their photophysical properties. Here, we study the impact of these heterogeneities on the diffusion of charge carriers, which are processes crucial for efficient collection of charges in light-harvesting devices. A photoluminescence tomography technique is developed in a confocal microscope using one- A nd two-photon excitation to distinguish between local surface and bulk diffusion of charge carriers in methylammonium lead bromide single crystals. We observe a large dispersion of local diffusion coefficients with values between 0.3 and 2 cm2·s-1 depending on the trap density and the morphological environment- A distribution that would be missed from analogous macroscopic or surface measurements. This work reveals a new framework to understand diffusion pathways, which are extremely sensitive to local properties and buried defects.

UR - http://hdl.handle.net/10754/660673

UR - https://pubs.acs.org/doi/10.1021/acsenergylett.9b02244

UR - http://www.scopus.com/inward/record.url?scp=85076630922&partnerID=8YFLogxK

U2 - 10.1021/acsenergylett.9b02244

DO - 10.1021/acsenergylett.9b02244

M3 - Article

C2 - 32055687

SN - 2380-8195

VL - 5

SP - 117

EP - 123

JO - ACS Energy Letters

JF - ACS Energy Letters

IS - 1

ER -

Visualizing Buried Local Carrier Diffusion in Halide Perovskite Crystals via Two-Photon Microscopy

Abstract

Bibliographical note

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this