Strain-Mediated Phase Stabilization

A New Strategy for Ultrastable α-CsPbI3 Perovskite by Nanoconfined Growth

Sunihl Ma, Seong Hun Kim, Beomjin Jeong, Hyeok Chan Kwon, Seong Cheol Yun, Gyumin Jang, Hyunha Yang, Cheolmin Park, Donghwa Lee, Joo Ho Moon

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

All-inorganic cesium lead triiodide (CsPbI3) perovskite is considered a promising solution-processable semiconductor for highly stable optoelectronic and photovoltaic applications. However, despite its excellent optoelectronic properties, the phase instability of CsPbI3 poses a critical hurdle for practical application. In this study, a novel stain-mediated phase stabilization strategy is demonstrated to significantly enhance the phase stability of cubic α-phase CsPbI3. Careful control of the degree of spatial confinement induced by anodized aluminum oxide (AAO) templates with varying pore sizes leads to effective manipulation of the phase stability of α-CsPbI3. The Williamson–Hall method in conjunction with density functional theory calculations clearly confirms that the strain imposed on the perovskite lattice when confined in vertically aligned nanopores can alter the formation energy of the system, stabilizing α-CsPbI3 at room temperature. Finally, the CsPbI3 grown inside nanoporous AAO templates exhibits exceptional phase stability over three months under ambient conditions, in which the resulting light-emitting diode reveals a natural red color emission with very narrow bandwidth (full width at half maximum of 33 nm) at 702 nm. The universally applicable template-based stabilization strategy can give in-depth insights on the strain-mediated phase transition mechanism in all-inorganic perovskites.

Original languageEnglish
Article number1900219
JournalSmall
Volume15
Issue number21
DOIs
Publication statusPublished - 2019 May 24

Fingerprint

Phase stability
Aluminum Oxide
Perovskite
Stabilization
Nanopores
Optoelectronic devices
Cesium
Semiconductors
Phase Transition
Growth
Aluminum
Oxides
Coloring Agents
Color
Full width at half maximum
Light
Temperature
Pore size
Density functional theory
Light emitting diodes

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Engineering (miscellaneous)

Cite this

Ma, Sunihl ; Kim, Seong Hun ; Jeong, Beomjin ; Kwon, Hyeok Chan ; Yun, Seong Cheol ; Jang, Gyumin ; Yang, Hyunha ; Park, Cheolmin ; Lee, Donghwa ; Moon, Joo Ho. / Strain-Mediated Phase Stabilization : A New Strategy for Ultrastable α-CsPbI3 Perovskite by Nanoconfined Growth. In: Small. 2019 ; Vol. 15, No. 21.
@article{e1b4a01a22ba4abebf520f404b752fdd,
title = "Strain-Mediated Phase Stabilization: A New Strategy for Ultrastable α-CsPbI3 Perovskite by Nanoconfined Growth",
abstract = "All-inorganic cesium lead triiodide (CsPbI3) perovskite is considered a promising solution-processable semiconductor for highly stable optoelectronic and photovoltaic applications. However, despite its excellent optoelectronic properties, the phase instability of CsPbI3 poses a critical hurdle for practical application. In this study, a novel stain-mediated phase stabilization strategy is demonstrated to significantly enhance the phase stability of cubic α-phase CsPbI3. Careful control of the degree of spatial confinement induced by anodized aluminum oxide (AAO) templates with varying pore sizes leads to effective manipulation of the phase stability of α-CsPbI3. The Williamson–Hall method in conjunction with density functional theory calculations clearly confirms that the strain imposed on the perovskite lattice when confined in vertically aligned nanopores can alter the formation energy of the system, stabilizing α-CsPbI3 at room temperature. Finally, the CsPbI3 grown inside nanoporous AAO templates exhibits exceptional phase stability over three months under ambient conditions, in which the resulting light-emitting diode reveals a natural red color emission with very narrow bandwidth (full width at half maximum of 33 nm) at 702 nm. The universally applicable template-based stabilization strategy can give in-depth insights on the strain-mediated phase transition mechanism in all-inorganic perovskites.",
author = "Sunihl Ma and Kim, {Seong Hun} and Beomjin Jeong and Kwon, {Hyeok Chan} and Yun, {Seong Cheol} and Gyumin Jang and Hyunha Yang and Cheolmin Park and Donghwa Lee and Moon, {Joo Ho}",
year = "2019",
month = "5",
day = "24",
doi = "10.1002/smll.201900219",
language = "English",
volume = "15",
journal = "Small",
issn = "1613-6810",
publisher = "Wiley-VCH Verlag",
number = "21",

}

Ma, S, Kim, SH, Jeong, B, Kwon, HC, Yun, SC, Jang, G, Yang, H, Park, C, Lee, D & Moon, JH 2019, 'Strain-Mediated Phase Stabilization: A New Strategy for Ultrastable α-CsPbI3 Perovskite by Nanoconfined Growth', Small, vol. 15, no. 21, 1900219. https://doi.org/10.1002/smll.201900219

Strain-Mediated Phase Stabilization : A New Strategy for Ultrastable α-CsPbI3 Perovskite by Nanoconfined Growth. / Ma, Sunihl; Kim, Seong Hun; Jeong, Beomjin; Kwon, Hyeok Chan; Yun, Seong Cheol; Jang, Gyumin; Yang, Hyunha; Park, Cheolmin; Lee, Donghwa; Moon, Joo Ho.

In: Small, Vol. 15, No. 21, 1900219, 24.05.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Strain-Mediated Phase Stabilization

T2 - A New Strategy for Ultrastable α-CsPbI3 Perovskite by Nanoconfined Growth

AU - Ma, Sunihl

AU - Kim, Seong Hun

AU - Jeong, Beomjin

AU - Kwon, Hyeok Chan

AU - Yun, Seong Cheol

AU - Jang, Gyumin

AU - Yang, Hyunha

AU - Park, Cheolmin

AU - Lee, Donghwa

AU - Moon, Joo Ho

PY - 2019/5/24

Y1 - 2019/5/24

N2 - All-inorganic cesium lead triiodide (CsPbI3) perovskite is considered a promising solution-processable semiconductor for highly stable optoelectronic and photovoltaic applications. However, despite its excellent optoelectronic properties, the phase instability of CsPbI3 poses a critical hurdle for practical application. In this study, a novel stain-mediated phase stabilization strategy is demonstrated to significantly enhance the phase stability of cubic α-phase CsPbI3. Careful control of the degree of spatial confinement induced by anodized aluminum oxide (AAO) templates with varying pore sizes leads to effective manipulation of the phase stability of α-CsPbI3. The Williamson–Hall method in conjunction with density functional theory calculations clearly confirms that the strain imposed on the perovskite lattice when confined in vertically aligned nanopores can alter the formation energy of the system, stabilizing α-CsPbI3 at room temperature. Finally, the CsPbI3 grown inside nanoporous AAO templates exhibits exceptional phase stability over three months under ambient conditions, in which the resulting light-emitting diode reveals a natural red color emission with very narrow bandwidth (full width at half maximum of 33 nm) at 702 nm. The universally applicable template-based stabilization strategy can give in-depth insights on the strain-mediated phase transition mechanism in all-inorganic perovskites.

AB - All-inorganic cesium lead triiodide (CsPbI3) perovskite is considered a promising solution-processable semiconductor for highly stable optoelectronic and photovoltaic applications. However, despite its excellent optoelectronic properties, the phase instability of CsPbI3 poses a critical hurdle for practical application. In this study, a novel stain-mediated phase stabilization strategy is demonstrated to significantly enhance the phase stability of cubic α-phase CsPbI3. Careful control of the degree of spatial confinement induced by anodized aluminum oxide (AAO) templates with varying pore sizes leads to effective manipulation of the phase stability of α-CsPbI3. The Williamson–Hall method in conjunction with density functional theory calculations clearly confirms that the strain imposed on the perovskite lattice when confined in vertically aligned nanopores can alter the formation energy of the system, stabilizing α-CsPbI3 at room temperature. Finally, the CsPbI3 grown inside nanoporous AAO templates exhibits exceptional phase stability over three months under ambient conditions, in which the resulting light-emitting diode reveals a natural red color emission with very narrow bandwidth (full width at half maximum of 33 nm) at 702 nm. The universally applicable template-based stabilization strategy can give in-depth insights on the strain-mediated phase transition mechanism in all-inorganic perovskites.

UR - http://www.scopus.com/inward/record.url?scp=85063929804&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85063929804&partnerID=8YFLogxK

U2 - 10.1002/smll.201900219

DO - 10.1002/smll.201900219

M3 - Article

VL - 15

JO - Small

JF - Small

SN - 1613-6810

IS - 21

M1 - 1900219

ER -