Formation Mechanism and Control of Perovskite Films from Solution to Crystalline Phase Studied by in Situ Synchrotron Scattering

Chih Yu Chang, Yu Ching Huang, Cheng Si Tsao, Wei Fang Su

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Controlling the crystallization and morphology of perovskite films is crucial for the fabrication of high-efficiency perovskite solar cells. For the first time, we investigate the formation mechanism of the drop-cast perovskite film from its precursor solution, PbCl 2 and CH 3 NH 3 I in N,N-dimethylformamide, to a crystalline CH 3 NH 3 PbI 3-x Cl x film at different substrate temperatures from 70 to 180 °C in ambient air and humidity. We employed an in situ grazing-incidence wide-angle X-ray scattering (GIWAXS) technique for this study. When the substrate temperature is at or below 100 °C, the perovskite film is formed in three stages: the initial solution stage, transition-to-solid film stage, and transformation stage from intermediates into a crystalline perovskite film. In each stage, the multiple routes for phase transformations are preceded concurrently. However, when the substrate temperature is increased from 100 to 180 °C, the formation mechanism of the perovskite film is changed from the "multistage formation mechanism" to the "direct formation mechanism". The proposed mechanism has been applied to understand the formation of a perovskite film containing an additive. The result of this study provides a fundamental understanding of the functions of the solvent and additive in the solution and transition states to the crystalline film. It provides useful knowledge to design and fabricate crystalline perovskite films for high-efficiency solar cells.

Original languageEnglish
Pages (from-to)26712-26721
Number of pages10
JournalACS Applied Materials and Interfaces
Volume8
Issue number40
DOIs
Publication statusPublished - Oct 12 2016
Externally publishedYes

Fingerprint

Synchrotrons
Perovskite
Scattering
Crystalline materials
Substrates
perovskite
Dimethylformamide
Crystallization
X ray scattering
Temperature
Atmospheric humidity
Solar cells
Phase transitions
Fabrication
Air

Keywords

  • crystallization kinetics
  • formation mechanism
  • grazing-incidence wide-angle X-ray scattering (GIWAXS)
  • perovskite
  • solar cell

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Formation Mechanism and Control of Perovskite Films from Solution to Crystalline Phase Studied by in Situ Synchrotron Scattering. / Chang, Chih Yu; Huang, Yu Ching; Tsao, Cheng Si; Su, Wei Fang.

In: ACS Applied Materials and Interfaces, Vol. 8, No. 40, 12.10.2016, p. 26712-26721.

Research output: Contribution to journalArticle

@article{150d80677897408abeb7fa689712ebeb,
title = "Formation Mechanism and Control of Perovskite Films from Solution to Crystalline Phase Studied by in Situ Synchrotron Scattering",
abstract = "Controlling the crystallization and morphology of perovskite films is crucial for the fabrication of high-efficiency perovskite solar cells. For the first time, we investigate the formation mechanism of the drop-cast perovskite film from its precursor solution, PbCl 2 and CH 3 NH 3 I in N,N-dimethylformamide, to a crystalline CH 3 NH 3 PbI 3-x Cl x film at different substrate temperatures from 70 to 180 °C in ambient air and humidity. We employed an in situ grazing-incidence wide-angle X-ray scattering (GIWAXS) technique for this study. When the substrate temperature is at or below 100 °C, the perovskite film is formed in three stages: the initial solution stage, transition-to-solid film stage, and transformation stage from intermediates into a crystalline perovskite film. In each stage, the multiple routes for phase transformations are preceded concurrently. However, when the substrate temperature is increased from 100 to 180 °C, the formation mechanism of the perovskite film is changed from the {"}multistage formation mechanism{"} to the {"}direct formation mechanism{"}. The proposed mechanism has been applied to understand the formation of a perovskite film containing an additive. The result of this study provides a fundamental understanding of the functions of the solvent and additive in the solution and transition states to the crystalline film. It provides useful knowledge to design and fabricate crystalline perovskite films for high-efficiency solar cells.",
keywords = "crystallization kinetics, formation mechanism, grazing-incidence wide-angle X-ray scattering (GIWAXS), perovskite, solar cell",
author = "Chang, {Chih Yu} and Huang, {Yu Ching} and Tsao, {Cheng Si} and Su, {Wei Fang}",
year = "2016",
month = "10",
day = "12",
doi = "10.1021/acsami.6b07468",
language = "English",
volume = "8",
pages = "26712--26721",
journal = "ACS applied materials & interfaces",
issn = "1944-8244",
publisher = "American Chemical Society",
number = "40",

}

TY - JOUR

T1 - Formation Mechanism and Control of Perovskite Films from Solution to Crystalline Phase Studied by in Situ Synchrotron Scattering

AU - Chang, Chih Yu

AU - Huang, Yu Ching

AU - Tsao, Cheng Si

AU - Su, Wei Fang

PY - 2016/10/12

Y1 - 2016/10/12

N2 - Controlling the crystallization and morphology of perovskite films is crucial for the fabrication of high-efficiency perovskite solar cells. For the first time, we investigate the formation mechanism of the drop-cast perovskite film from its precursor solution, PbCl 2 and CH 3 NH 3 I in N,N-dimethylformamide, to a crystalline CH 3 NH 3 PbI 3-x Cl x film at different substrate temperatures from 70 to 180 °C in ambient air and humidity. We employed an in situ grazing-incidence wide-angle X-ray scattering (GIWAXS) technique for this study. When the substrate temperature is at or below 100 °C, the perovskite film is formed in three stages: the initial solution stage, transition-to-solid film stage, and transformation stage from intermediates into a crystalline perovskite film. In each stage, the multiple routes for phase transformations are preceded concurrently. However, when the substrate temperature is increased from 100 to 180 °C, the formation mechanism of the perovskite film is changed from the "multistage formation mechanism" to the "direct formation mechanism". The proposed mechanism has been applied to understand the formation of a perovskite film containing an additive. The result of this study provides a fundamental understanding of the functions of the solvent and additive in the solution and transition states to the crystalline film. It provides useful knowledge to design and fabricate crystalline perovskite films for high-efficiency solar cells.

AB - Controlling the crystallization and morphology of perovskite films is crucial for the fabrication of high-efficiency perovskite solar cells. For the first time, we investigate the formation mechanism of the drop-cast perovskite film from its precursor solution, PbCl 2 and CH 3 NH 3 I in N,N-dimethylformamide, to a crystalline CH 3 NH 3 PbI 3-x Cl x film at different substrate temperatures from 70 to 180 °C in ambient air and humidity. We employed an in situ grazing-incidence wide-angle X-ray scattering (GIWAXS) technique for this study. When the substrate temperature is at or below 100 °C, the perovskite film is formed in three stages: the initial solution stage, transition-to-solid film stage, and transformation stage from intermediates into a crystalline perovskite film. In each stage, the multiple routes for phase transformations are preceded concurrently. However, when the substrate temperature is increased from 100 to 180 °C, the formation mechanism of the perovskite film is changed from the "multistage formation mechanism" to the "direct formation mechanism". The proposed mechanism has been applied to understand the formation of a perovskite film containing an additive. The result of this study provides a fundamental understanding of the functions of the solvent and additive in the solution and transition states to the crystalline film. It provides useful knowledge to design and fabricate crystalline perovskite films for high-efficiency solar cells.

KW - crystallization kinetics

KW - formation mechanism

KW - grazing-incidence wide-angle X-ray scattering (GIWAXS)

KW - perovskite

KW - solar cell

UR - http://www.scopus.com/inward/record.url?scp=84991628345&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84991628345&partnerID=8YFLogxK

U2 - 10.1021/acsami.6b07468

DO - 10.1021/acsami.6b07468

M3 - Article

AN - SCOPUS:84991628345

VL - 8

SP - 26712

EP - 26721

JO - ACS applied materials & interfaces

JF - ACS applied materials & interfaces

SN - 1944-8244

IS - 40

ER -