Roles of SnX 2 (X = F, Cl, Br) Additives in Tin-Based Halide Perovskites toward Highly Efficient and Stable Lead-Free Perovskite Solar Cells

Jin Hyuck Heo, Jongseob Kim, Hyungjun Kim, Sang Hwa Moon, Sang Hyuk Im, Ki Ha Hong

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Preserving the stability of Sn-based halide perovskites is a primary concern in developing photovoltaic light-absorbing materials for lead-free perovskite solar cells. Whereas the addition of SnX 2 (X = F, Cl, Br) has been demonstrated to improve the photovoltaic performance of Sn halide perovskite solar cells, the mechanistic roles of SnX 2 in the performance enhancement have not yet been studied appropriately. Here we perform a comparative study of CsSnI 3 films and devices and examine how SnX 2 additives affect their stability, and the results are corroborated by first-principles-based theoretical calculations. Unlike the conventional belief that the additives annihilate defects, we find that the additives effectively passivate the surface and stabilize the perovskite phase, promoting the stability of CsSnI 3 . Our mechanism suggests that SnBr 2 , which shows ca. 100 h of prolonged stability along with a high power conversion efficiency of 4.3%, is the best additive for enhancing the stability of CsSnI 3 .

Original languageEnglish
Pages (from-to)6024-6031
Number of pages8
JournalJournal of Physical Chemistry Letters
Volume9
Issue number20
DOIs
Publication statusPublished - 2018 Oct 18

Fingerprint

Tin
perovskites
halides
tin
Lead
solar cells
Light
Equipment and Supplies
Perovskite
preserving
Conversion efficiency
Perovskite solar cells
perovskite
Defects
augmentation
defects

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

Cite this

Roles of SnX 2 (X = F, Cl, Br) Additives in Tin-Based Halide Perovskites toward Highly Efficient and Stable Lead-Free Perovskite Solar Cells . / Heo, Jin Hyuck; Kim, Jongseob; Kim, Hyungjun; Moon, Sang Hwa; Im, Sang Hyuk; Hong, Ki Ha.

In: Journal of Physical Chemistry Letters, Vol. 9, No. 20, 18.10.2018, p. 6024-6031.

Research output: Contribution to journalArticle

@article{53a283a8dc4944d9aee20c0e5d2a38ed,
title = "Roles of SnX 2 (X = F, Cl, Br) Additives in Tin-Based Halide Perovskites toward Highly Efficient and Stable Lead-Free Perovskite Solar Cells",
abstract = "Preserving the stability of Sn-based halide perovskites is a primary concern in developing photovoltaic light-absorbing materials for lead-free perovskite solar cells. Whereas the addition of SnX 2 (X = F, Cl, Br) has been demonstrated to improve the photovoltaic performance of Sn halide perovskite solar cells, the mechanistic roles of SnX 2 in the performance enhancement have not yet been studied appropriately. Here we perform a comparative study of CsSnI 3 films and devices and examine how SnX 2 additives affect their stability, and the results are corroborated by first-principles-based theoretical calculations. Unlike the conventional belief that the additives annihilate defects, we find that the additives effectively passivate the surface and stabilize the perovskite phase, promoting the stability of CsSnI 3 . Our mechanism suggests that SnBr 2 , which shows ca. 100 h of prolonged stability along with a high power conversion efficiency of 4.3{\%}, is the best additive for enhancing the stability of CsSnI 3 .",
author = "Heo, {Jin Hyuck} and Jongseob Kim and Hyungjun Kim and Moon, {Sang Hwa} and Im, {Sang Hyuk} and Hong, {Ki Ha}",
year = "2018",
month = "10",
day = "18",
doi = "10.1021/acs.jpclett.8b02555",
language = "English",
volume = "9",
pages = "6024--6031",
journal = "Journal of Physical Chemistry Letters",
issn = "1948-7185",
publisher = "American Chemical Society",
number = "20",

}

TY - JOUR

T1 - Roles of SnX 2 (X = F, Cl, Br) Additives in Tin-Based Halide Perovskites toward Highly Efficient and Stable Lead-Free Perovskite Solar Cells

AU - Heo, Jin Hyuck

AU - Kim, Jongseob

AU - Kim, Hyungjun

AU - Moon, Sang Hwa

AU - Im, Sang Hyuk

AU - Hong, Ki Ha

PY - 2018/10/18

Y1 - 2018/10/18

N2 - Preserving the stability of Sn-based halide perovskites is a primary concern in developing photovoltaic light-absorbing materials for lead-free perovskite solar cells. Whereas the addition of SnX 2 (X = F, Cl, Br) has been demonstrated to improve the photovoltaic performance of Sn halide perovskite solar cells, the mechanistic roles of SnX 2 in the performance enhancement have not yet been studied appropriately. Here we perform a comparative study of CsSnI 3 films and devices and examine how SnX 2 additives affect their stability, and the results are corroborated by first-principles-based theoretical calculations. Unlike the conventional belief that the additives annihilate defects, we find that the additives effectively passivate the surface and stabilize the perovskite phase, promoting the stability of CsSnI 3 . Our mechanism suggests that SnBr 2 , which shows ca. 100 h of prolonged stability along with a high power conversion efficiency of 4.3%, is the best additive for enhancing the stability of CsSnI 3 .

AB - Preserving the stability of Sn-based halide perovskites is a primary concern in developing photovoltaic light-absorbing materials for lead-free perovskite solar cells. Whereas the addition of SnX 2 (X = F, Cl, Br) has been demonstrated to improve the photovoltaic performance of Sn halide perovskite solar cells, the mechanistic roles of SnX 2 in the performance enhancement have not yet been studied appropriately. Here we perform a comparative study of CsSnI 3 films and devices and examine how SnX 2 additives affect their stability, and the results are corroborated by first-principles-based theoretical calculations. Unlike the conventional belief that the additives annihilate defects, we find that the additives effectively passivate the surface and stabilize the perovskite phase, promoting the stability of CsSnI 3 . Our mechanism suggests that SnBr 2 , which shows ca. 100 h of prolonged stability along with a high power conversion efficiency of 4.3%, is the best additive for enhancing the stability of CsSnI 3 .

UR - http://www.scopus.com/inward/record.url?scp=85054696102&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85054696102&partnerID=8YFLogxK

U2 - 10.1021/acs.jpclett.8b02555

DO - 10.1021/acs.jpclett.8b02555

M3 - Article

C2 - 30259748

AN - SCOPUS:85054696102

VL - 9

SP - 6024

EP - 6031

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

SN - 1948-7185

IS - 20

ER -