Tunable light emissions of PEAI-doped FA0.6Cs0.4Pb(I0.6Br0.4)3 thin films via manipulating self-healing and phase segregation effects

Anjali Chandel; Chia Lung Tsai; Sheng Hsiung Chang

doi:10.1016/j.jlumin.2025.121427

Tunable light emissions of PEAI-doped FA_0.6Cs_0.4Pb(I_0.6Br_0.4)₃ thin films via manipulating self-healing and phase segregation effects

Anjali Chandel, Chia Lung Tsai, Sheng Hsiung Chang^*

^*Corresponding author for this work

Department of Electronic Engineering

Research output: Contribution to journal › Journal Article › peer-review

Abstract

The near-infrared emission intensity of aged FA_0.6Cs_0.4Pb(I_0.6Br_0.4)₃ mixed perovskite films are increased by more than 2 times via the surface passivation with phenethylammonium iodide (PEAI) molecules. When the PEAI concentration is 3 mg/mL, the near-infrared emission of the laser-induced mixed perovskite film is stable and fixed at the peak wavelength of about 740 nm after 20 s. The X-ray diffraction patterns, Urbach energy values, atomic-force microscopic images, and time-dependent two-photon photoluminescence (TPPL) spectra are used to understand the time-dependent PL spectra and enhanced PL intensity of the mixed perovskite thin films without and with the PEAI additives. Our findings provide a method to adjust the light emission wavelength of mixed perovskite thin films in the near-infrared wavelength range.

Original language	English
Article number	121427
Journal	Journal of Luminescence
Volume	286
DOIs	https://doi.org/10.1016/j.jlumin.2025.121427
State	Published - 11 2025

Bibliographical note

Publisher Copyright:
© 2025

Keywords

FACsPb(IBr)
Near-infrared emission
PEAI
Phase segregation
Time-dependent PL

Access to Document

10.1016/j.jlumin.2025.121427

Cite this

@article{c0e3bbfc7ae74de098f18d53579855ac,

title = "Tunable light emissions of PEAI-doped FA0.6Cs0.4Pb(I0.6Br0.4)3 thin films via manipulating self-healing and phase segregation effects",

abstract = "The near-infrared emission intensity of aged FA0.6Cs0.4Pb(I0.6Br0.4)3 mixed perovskite films are increased by more than 2 times via the surface passivation with phenethylammonium iodide (PEAI) molecules. When the PEAI concentration is 3 mg/mL, the near-infrared emission of the laser-induced mixed perovskite film is stable and fixed at the peak wavelength of about 740 nm after 20 s. The X-ray diffraction patterns, Urbach energy values, atomic-force microscopic images, and time-dependent two-photon photoluminescence (TPPL) spectra are used to understand the time-dependent PL spectra and enhanced PL intensity of the mixed perovskite thin films without and with the PEAI additives. Our findings provide a method to adjust the light emission wavelength of mixed perovskite thin films in the near-infrared wavelength range.",

keywords = "FACsPb(IBr), Near-infrared emission, PEAI, Phase segregation, Time-dependent PL",

author = "Anjali Chandel and Tsai, \{Chia Lung\} and Chang, \{Sheng Hsiung\}",

note = "Publisher Copyright: {\textcopyright} 2025",

year = "2025",

month = nov,

doi = "10.1016/j.jlumin.2025.121427",

language = "英语",

volume = "286",

journal = "Journal of Luminescence",

issn = "0022-2313",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Tunable light emissions of PEAI-doped FA0.6Cs0.4Pb(I0.6Br0.4)3 thin films via manipulating self-healing and phase segregation effects

AU - Chandel, Anjali

AU - Tsai, Chia Lung

AU - Chang, Sheng Hsiung

PY - 2025/11

Y1 - 2025/11

N2 - The near-infrared emission intensity of aged FA0.6Cs0.4Pb(I0.6Br0.4)3 mixed perovskite films are increased by more than 2 times via the surface passivation with phenethylammonium iodide (PEAI) molecules. When the PEAI concentration is 3 mg/mL, the near-infrared emission of the laser-induced mixed perovskite film is stable and fixed at the peak wavelength of about 740 nm after 20 s. The X-ray diffraction patterns, Urbach energy values, atomic-force microscopic images, and time-dependent two-photon photoluminescence (TPPL) spectra are used to understand the time-dependent PL spectra and enhanced PL intensity of the mixed perovskite thin films without and with the PEAI additives. Our findings provide a method to adjust the light emission wavelength of mixed perovskite thin films in the near-infrared wavelength range.

AB - The near-infrared emission intensity of aged FA0.6Cs0.4Pb(I0.6Br0.4)3 mixed perovskite films are increased by more than 2 times via the surface passivation with phenethylammonium iodide (PEAI) molecules. When the PEAI concentration is 3 mg/mL, the near-infrared emission of the laser-induced mixed perovskite film is stable and fixed at the peak wavelength of about 740 nm after 20 s. The X-ray diffraction patterns, Urbach energy values, atomic-force microscopic images, and time-dependent two-photon photoluminescence (TPPL) spectra are used to understand the time-dependent PL spectra and enhanced PL intensity of the mixed perovskite thin films without and with the PEAI additives. Our findings provide a method to adjust the light emission wavelength of mixed perovskite thin films in the near-infrared wavelength range.

KW - FACsPb(IBr)

KW - Near-infrared emission

KW - PEAI

KW - Phase segregation

KW - Time-dependent PL

UR - https://www.scopus.com/pages/publications/105012193822

U2 - 10.1016/j.jlumin.2025.121427

DO - 10.1016/j.jlumin.2025.121427

M3 - 文章

AN - SCOPUS:105012193822

SN - 0022-2313

VL - 286

JO - Journal of Luminescence

JF - Journal of Luminescence

M1 - 121427

ER -