CsSnBr3, A Lead-Free Halide Perovskite for Long-Term Solar Cell Application: Insights on SnF2 Addition

Satyajit Gupta; Tatyana Bendikov; Gary Hodes; David Cahen

doi:10.1021/acsenergylett.6b00402

CsSnBr₃, A Lead-Free Halide Perovskite for Long-Term Solar Cell Application: Insights on SnF₂ Addition

Satyajit Gupta, Tatyana Bendikov, Gary Hodes, David Cahen

Weizmann Institute of Science

Research output: Contribution to journal › Review article › peer-review

291 Scopus citations

Abstract

Solar cells based on "halide perovskites" (HaPs) have demonstrated unprecedented high power conversion efficiencies in recent years. However, the well-known toxicity of lead (Pb), which is used in the most studied cells, may affect its widespread use. We explored an all-inorganic lead-free perovskite option, cesium tin bromide (CsSnBr₃), for optoelectronic applications. CsSnBr₃-based solar cells exhibited photoconversion efficiencies (PCEs) of 2.1%, with a short-circuit current (J_SC) of ∼9 mA cm^-2, an open circuit potential (V_OC) of 0.41 V, and a fill factor (FF) of 58% under 1 sun (100 mW cm^-2) illumination, which, even though meager compared to the Pb analogue-based cells, are among the best reported until now. As reported earlier, addition of tin fluoride (SnF₂) was found to be beneficial for obtaining good device performance, possibly due to reduction of the background carrier density by neutralizing traps, possibly via filling of cation vacancies. The roles of SnF₂ on the properties of the CsSnBr₃ were investigated using ultraviolet photoemission spectroscopy (UPS) and X-ray photoelectron spectroscopy (XPS) analysis.

Original language	English
Pages (from-to)	1028-1033
Number of pages	6
Journal	ACS Energy Letters
Volume	1
Issue number	5
DOIs	https://doi.org/10.1021/acsenergylett.6b00402
State	Published - 11 Nov 2016
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

Funding

This research work was supported by the Israeli Ministry of National Infrastructures, Energy and Water Resources as part of an ERA-net project and by the Israel Ministry of Science and Technology’s China−Israel program. D.C. holds the Sylvia and Rowland Schaefer Chair in Energy Research.

Funders	Funder number
ERA-net
Israel Ministry of Science and Technology
Ministry of Science and Technology’s
Ministry of National Infrastructure, Energy and Water Resources

UN SDGs

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

Access to Document

10.1021/acsenergylett.6b00402

Cite this

@article{088b34b68d104791926308edcdb0f2a9,

title = "CsSnBr3, A Lead-Free Halide Perovskite for Long-Term Solar Cell Application: Insights on SnF2 Addition",

abstract = "Solar cells based on {"}halide perovskites{"} (HaPs) have demonstrated unprecedented high power conversion efficiencies in recent years. However, the well-known toxicity of lead (Pb), which is used in the most studied cells, may affect its widespread use. We explored an all-inorganic lead-free perovskite option, cesium tin bromide (CsSnBr3), for optoelectronic applications. CsSnBr3-based solar cells exhibited photoconversion efficiencies (PCEs) of 2.1%, with a short-circuit current (JSC) of ∼9 mA cm-2, an open circuit potential (VOC) of 0.41 V, and a fill factor (FF) of 58% under 1 sun (100 mW cm-2) illumination, which, even though meager compared to the Pb analogue-based cells, are among the best reported until now. As reported earlier, addition of tin fluoride (SnF2) was found to be beneficial for obtaining good device performance, possibly due to reduction of the background carrier density by neutralizing traps, possibly via filling of cation vacancies. The roles of SnF2 on the properties of the CsSnBr3 were investigated using ultraviolet photoemission spectroscopy (UPS) and X-ray photoelectron spectroscopy (XPS) analysis.",

author = "Satyajit Gupta and Tatyana Bendikov and Gary Hodes and David Cahen",

note = "Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

year = "2016",

month = nov,

day = "11",

doi = "10.1021/acsenergylett.6b00402",

language = "אנגלית",

volume = "1",

pages = "1028--1033",

journal = "ACS Energy Letters",

issn = "2380-8195",

publisher = "American Chemical Society",

number = "5",

}

TY - JOUR

T1 - CsSnBr3, A Lead-Free Halide Perovskite for Long-Term Solar Cell Application

T2 - Insights on SnF2 Addition

AU - Gupta, Satyajit

AU - Bendikov, Tatyana

AU - Hodes, Gary

AU - Cahen, David

PY - 2016/11/11

Y1 - 2016/11/11

N2 - Solar cells based on "halide perovskites" (HaPs) have demonstrated unprecedented high power conversion efficiencies in recent years. However, the well-known toxicity of lead (Pb), which is used in the most studied cells, may affect its widespread use. We explored an all-inorganic lead-free perovskite option, cesium tin bromide (CsSnBr3), for optoelectronic applications. CsSnBr3-based solar cells exhibited photoconversion efficiencies (PCEs) of 2.1%, with a short-circuit current (JSC) of ∼9 mA cm-2, an open circuit potential (VOC) of 0.41 V, and a fill factor (FF) of 58% under 1 sun (100 mW cm-2) illumination, which, even though meager compared to the Pb analogue-based cells, are among the best reported until now. As reported earlier, addition of tin fluoride (SnF2) was found to be beneficial for obtaining good device performance, possibly due to reduction of the background carrier density by neutralizing traps, possibly via filling of cation vacancies. The roles of SnF2 on the properties of the CsSnBr3 were investigated using ultraviolet photoemission spectroscopy (UPS) and X-ray photoelectron spectroscopy (XPS) analysis.

AB - Solar cells based on "halide perovskites" (HaPs) have demonstrated unprecedented high power conversion efficiencies in recent years. However, the well-known toxicity of lead (Pb), which is used in the most studied cells, may affect its widespread use. We explored an all-inorganic lead-free perovskite option, cesium tin bromide (CsSnBr3), for optoelectronic applications. CsSnBr3-based solar cells exhibited photoconversion efficiencies (PCEs) of 2.1%, with a short-circuit current (JSC) of ∼9 mA cm-2, an open circuit potential (VOC) of 0.41 V, and a fill factor (FF) of 58% under 1 sun (100 mW cm-2) illumination, which, even though meager compared to the Pb analogue-based cells, are among the best reported until now. As reported earlier, addition of tin fluoride (SnF2) was found to be beneficial for obtaining good device performance, possibly due to reduction of the background carrier density by neutralizing traps, possibly via filling of cation vacancies. The roles of SnF2 on the properties of the CsSnBr3 were investigated using ultraviolet photoemission spectroscopy (UPS) and X-ray photoelectron spectroscopy (XPS) analysis.

UR - http://www.scopus.com/inward/record.url?scp=85017080703&partnerID=8YFLogxK

U2 - 10.1021/acsenergylett.6b00402

DO - 10.1021/acsenergylett.6b00402

M3 - ???researchoutput.researchoutputtypes.contributiontojournal.systematicreview???

AN - SCOPUS:85017080703

SN - 2380-8195

VL - 1

SP - 1028

EP - 1033

JO - ACS Energy Letters

JF - ACS Energy Letters

IS - 5

ER -