Nanoscale mapping of humid degradation-induced local mechanical property variation in CH3NH3PbI3 polycrystalline film by scanning probe microscopy

Wan Ci Liao, Bernard Haochih Liu, Ching Chich Leu

研究成果: Article

摘要

We reported on the humid degradation-induced local elastic modulus (Young's modulus) variation in CH3NH3PbI3 (MAPbI3) polycrystalline film investigated by scanning probe microscopy (SPM) in humid ambient. The SPM equipped with PeakForce Quantitative Nanomechanical Measurement (PeakForce QNM) has ability to probe the near-surface elastic modulus on the specific position of material, examining the correlation between the local mechanical property and the microstructure of film through the nanoscale mapping of elastic modulus. Based on the observed variation of elastic modulus of film with aging time, we proposed a four stage degradation process, due to the development of MAPbI3·H2O and PbI2 phases, occurred on the MAPbI3 film when it aged in ambient. Evidently, the grain boundary plays a critical role for degradation process in a polycrystalline film, leading to a distinct result to that in the MAPbI3 single crystal. When the MAPbI3·H2O developed at the grain boundary, it perturbed from surface to form the low modulus humps. Our study result also suggested that grain boundary is the last region of film surface to form PbI2 under a humid ambient. These analyses provided key insights into the microstructural effects on the degradation process of a MAPbI3 polycrystalline film.

原文English
文章編號145078
期刊Applied Surface Science
507
DOIs
出版狀態Published - 2020 三月 30

指紋

Scanning probe microscopy
mechanical properties
degradation
microscopy
Degradation
Mechanical properties
modulus of elasticity
scanning
probes
Elastic moduli
Grain boundaries
grain boundaries
Aging of materials
Single crystals
microstructure
Microstructure
single crystals

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

引用此文

@article{2df1769c54494312b4a2795864723cd5,
title = "Nanoscale mapping of humid degradation-induced local mechanical property variation in CH3NH3PbI3 polycrystalline film by scanning probe microscopy",
abstract = "We reported on the humid degradation-induced local elastic modulus (Young's modulus) variation in CH3NH3PbI3 (MAPbI3) polycrystalline film investigated by scanning probe microscopy (SPM) in humid ambient. The SPM equipped with PeakForce Quantitative Nanomechanical Measurement (PeakForce QNM) has ability to probe the near-surface elastic modulus on the specific position of material, examining the correlation between the local mechanical property and the microstructure of film through the nanoscale mapping of elastic modulus. Based on the observed variation of elastic modulus of film with aging time, we proposed a four stage degradation process, due to the development of MAPbI3·H2O and PbI2 phases, occurred on the MAPbI3 film when it aged in ambient. Evidently, the grain boundary plays a critical role for degradation process in a polycrystalline film, leading to a distinct result to that in the MAPbI3 single crystal. When the MAPbI3·H2O developed at the grain boundary, it perturbed from surface to form the low modulus humps. Our study result also suggested that grain boundary is the last region of film surface to form PbI2 under a humid ambient. These analyses provided key insights into the microstructural effects on the degradation process of a MAPbI3 polycrystalline film.",
author = "Liao, {Wan Ci} and Liu, {Bernard Haochih} and Leu, {Ching Chich}",
year = "2020",
month = "3",
day = "30",
doi = "10.1016/j.apsusc.2019.145078",
language = "English",
volume = "507",
journal = "Applied Surface Science",
issn = "0169-4332",
publisher = "Elsevier",

}

TY - JOUR

T1 - Nanoscale mapping of humid degradation-induced local mechanical property variation in CH3NH3PbI3 polycrystalline film by scanning probe microscopy

AU - Liao, Wan Ci

AU - Liu, Bernard Haochih

AU - Leu, Ching Chich

PY - 2020/3/30

Y1 - 2020/3/30

N2 - We reported on the humid degradation-induced local elastic modulus (Young's modulus) variation in CH3NH3PbI3 (MAPbI3) polycrystalline film investigated by scanning probe microscopy (SPM) in humid ambient. The SPM equipped with PeakForce Quantitative Nanomechanical Measurement (PeakForce QNM) has ability to probe the near-surface elastic modulus on the specific position of material, examining the correlation between the local mechanical property and the microstructure of film through the nanoscale mapping of elastic modulus. Based on the observed variation of elastic modulus of film with aging time, we proposed a four stage degradation process, due to the development of MAPbI3·H2O and PbI2 phases, occurred on the MAPbI3 film when it aged in ambient. Evidently, the grain boundary plays a critical role for degradation process in a polycrystalline film, leading to a distinct result to that in the MAPbI3 single crystal. When the MAPbI3·H2O developed at the grain boundary, it perturbed from surface to form the low modulus humps. Our study result also suggested that grain boundary is the last region of film surface to form PbI2 under a humid ambient. These analyses provided key insights into the microstructural effects on the degradation process of a MAPbI3 polycrystalline film.

AB - We reported on the humid degradation-induced local elastic modulus (Young's modulus) variation in CH3NH3PbI3 (MAPbI3) polycrystalline film investigated by scanning probe microscopy (SPM) in humid ambient. The SPM equipped with PeakForce Quantitative Nanomechanical Measurement (PeakForce QNM) has ability to probe the near-surface elastic modulus on the specific position of material, examining the correlation between the local mechanical property and the microstructure of film through the nanoscale mapping of elastic modulus. Based on the observed variation of elastic modulus of film with aging time, we proposed a four stage degradation process, due to the development of MAPbI3·H2O and PbI2 phases, occurred on the MAPbI3 film when it aged in ambient. Evidently, the grain boundary plays a critical role for degradation process in a polycrystalline film, leading to a distinct result to that in the MAPbI3 single crystal. When the MAPbI3·H2O developed at the grain boundary, it perturbed from surface to form the low modulus humps. Our study result also suggested that grain boundary is the last region of film surface to form PbI2 under a humid ambient. These analyses provided key insights into the microstructural effects on the degradation process of a MAPbI3 polycrystalline film.

UR - http://www.scopus.com/inward/record.url?scp=85076633054&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85076633054&partnerID=8YFLogxK

U2 - 10.1016/j.apsusc.2019.145078

DO - 10.1016/j.apsusc.2019.145078

M3 - Article

AN - SCOPUS:85076633054

VL - 507

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

M1 - 145078

ER -