Elucidating the charge carrier separation and working mechanism of CH 3 NH 3 PbI 3-x Cl x perovskite solar cells

Eran Edri; Saar Kirmayer; Sabyasachi Mukhopadhyay; Konstantin Gartsman; Gary Hodes; David Cahen

doi:10.1038/ncomms4461

Elucidating the charge carrier separation and working mechanism of CH 3 NH 3 PbI 3-x Cl x perovskite solar cells

Eran Edri, Saar Kirmayer, Sabyasachi Mukhopadhyay, Konstantin Gartsman, Gary Hodes, David Cahen

Weizmann Institute of Science

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

504 Scopus citations

Abstract

Developments in organic-inorganic lead halide-based perovskite solar cells have been meteoric over the last 2 years, with small-area efficiencies surpassing 15%. We address the fundamental issue of how these cells work by applying a scanning electron microscopy-based technique to cell cross-sections. By mapping the variation in efficiency of charge separation and collection in the cross-sections, we show the presence of two prime high efficiency locations, one at/near the absorber/hole-blocking-layer, and the second at/near the absorber/electron-blocking-layer interfaces, with the former more pronounced. This 'twin-peaks' profile is characteristic of a p-i-n solar cell, with a layer of low-doped, high electronic quality semiconductor, between a p- and an n-layer. If the electron blocker is replaced by a gold contact, only a heterojunction at the absorber/hole-blocking interface remains.

Original language	English
Article number	3461
Journal	Nature Communications
Volume	5
DOIs	https://doi.org/10.1038/ncomms4461
State	Published - 11 Mar 2014
Externally published	Yes

Funding

We thank the Leona M. and Harry B. Helmsley Charitable Trust, the Weizmann-UK Joint Research Program, the Israel Ministry of Science’s ‘Tashtiot’ program, Mr Martin Kushner Schnur and the Nancy and Stephen Grand Center for Sensors and Security, for partial support. S.M. thanks PBC Program of the Israel Council for Higher Education for a fellowship. D.C. holds the Sylvia and Rowland Schaefer Chair in Energy research.

Funders	Funder number
Israel Ministry of Science
Nancy and Stephen Grand Center for Sensors and Security
PBC Program of the Israel Council for Higher Education
Leona M. and Harry B. Helmsley Charitable Trust

Access to Document

10.1038/ncomms4461

Cite this

@article{163780878c4c43fda1f9ce71577a577c,

title = "Elucidating the charge carrier separation and working mechanism of CH 3 NH 3 PbI 3-x Cl x perovskite solar cells",

abstract = "Developments in organic-inorganic lead halide-based perovskite solar cells have been meteoric over the last 2 years, with small-area efficiencies surpassing 15%. We address the fundamental issue of how these cells work by applying a scanning electron microscopy-based technique to cell cross-sections. By mapping the variation in efficiency of charge separation and collection in the cross-sections, we show the presence of two prime high efficiency locations, one at/near the absorber/hole-blocking-layer, and the second at/near the absorber/electron-blocking-layer interfaces, with the former more pronounced. This 'twin-peaks' profile is characteristic of a p-i-n solar cell, with a layer of low-doped, high electronic quality semiconductor, between a p- and an n-layer. If the electron blocker is replaced by a gold contact, only a heterojunction at the absorber/hole-blocking interface remains.",

author = "Eran Edri and Saar Kirmayer and Sabyasachi Mukhopadhyay and Konstantin Gartsman and Gary Hodes and David Cahen",

year = "2014",

month = mar,

day = "11",

doi = "10.1038/ncomms4461",

language = "אנגלית",

volume = "5",

journal = "Nature Communications",

issn = "2041-1723",

publisher = "Nature Publishing Group",

}

TY - JOUR

T1 - Elucidating the charge carrier separation and working mechanism of CH 3 NH 3 PbI 3-x Cl x perovskite solar cells

AU - Edri, Eran

AU - Kirmayer, Saar

AU - Mukhopadhyay, Sabyasachi

AU - Gartsman, Konstantin

AU - Hodes, Gary

AU - Cahen, David

PY - 2014/3/11

Y1 - 2014/3/11

N2 - Developments in organic-inorganic lead halide-based perovskite solar cells have been meteoric over the last 2 years, with small-area efficiencies surpassing 15%. We address the fundamental issue of how these cells work by applying a scanning electron microscopy-based technique to cell cross-sections. By mapping the variation in efficiency of charge separation and collection in the cross-sections, we show the presence of two prime high efficiency locations, one at/near the absorber/hole-blocking-layer, and the second at/near the absorber/electron-blocking-layer interfaces, with the former more pronounced. This 'twin-peaks' profile is characteristic of a p-i-n solar cell, with a layer of low-doped, high electronic quality semiconductor, between a p- and an n-layer. If the electron blocker is replaced by a gold contact, only a heterojunction at the absorber/hole-blocking interface remains.

AB - Developments in organic-inorganic lead halide-based perovskite solar cells have been meteoric over the last 2 years, with small-area efficiencies surpassing 15%. We address the fundamental issue of how these cells work by applying a scanning electron microscopy-based technique to cell cross-sections. By mapping the variation in efficiency of charge separation and collection in the cross-sections, we show the presence of two prime high efficiency locations, one at/near the absorber/hole-blocking-layer, and the second at/near the absorber/electron-blocking-layer interfaces, with the former more pronounced. This 'twin-peaks' profile is characteristic of a p-i-n solar cell, with a layer of low-doped, high electronic quality semiconductor, between a p- and an n-layer. If the electron blocker is replaced by a gold contact, only a heterojunction at the absorber/hole-blocking interface remains.

UR - http://www.scopus.com/inward/record.url?scp=84896371689&partnerID=8YFLogxK

U2 - 10.1038/ncomms4461

DO - 10.1038/ncomms4461

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

C2 - 24613942

AN - SCOPUS:84896371689

SN - 2041-1723

VL - 5

JO - Nature Communications

JF - Nature Communications

M1 - 3461

ER -

Elucidating the charge carrier separation and working mechanism of CH 3 NH 3 PbI 3-x Cl x perovskite solar cells

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this