Publication detail

Engineering Sr-doping for enabling long-term stable FAPb(1-x)Sr(x)I(3) quantum dots with 100% photoluminescence quantum yield

GUALDRON-REYES, A. MACIAS-PINILLA, D.F. MASI, S. ECHEVERRIA-ARRONDO, C. AGOURAM, S. MUNOS-SANJOSE, V. RODRIGUEZ PEREIRA, J. MACÁK, J. MORA-SERO, I.

Original Title

Engineering Sr-doping for enabling long-term stable FAPb(1-x)Sr(x)I(3) quantum dots with 100% photoluminescence quantum yield

Type

journal article in Web of Science

Language

English

Original Abstract

The Pb substitution in quantum dots (PQDs) with lesser toxic metals has been widely searched to be environmentally friendly, and be of comparable or improved performance compared to the lead-perovskite. However, the chemical nature of the lead substitute influences the incorporation mechanism into PQDs, which has not been explored in depth. In this work, we analyzed Sr-doping-induced changes in FAPbI(3) perovskites by studying the optical, structural properties and chemical environment of FAPb(1-x)Sr(x)I(3) PQDs. The substitution of Pb by 7 at% Sr allows us to achieve FAPb(1-x)Sr(x)I(3) PQDs with 100% PLQY, high stability for 8 months under a relative humidity of 40-50%, and T-80 = 6.5 months, one of the highest values reported for halide PQDs under air ambient conditions. FAPb(0.93)Sr(0.07)I(3) PQDs also exhibit photobrightening under UV illumination for 12 h, recovering 100% PLQY at 15 days after synthesis. The suppression of structural defects mediated by Sr-doping decreases the non-radiative recombination mechanism. By attempting to increase the Sr content in PQDs, a mixture of 2D nanoplatelets/3D nanocubes has emerged, caused by a high Pb deficiency during the FAPb(1-x)Sr(x)I(3) synthesis. This contribution gives a novel insight to understand how the suitable/poor Pb substitution achieved through Sr-doping dictates the photophysical properties of PQDs that may be potentially applicable in optoelectronics.

Keywords

photoluminescence quantum dots, 3D nanocubes

Authors

GUALDRON-REYES, A.; MACIAS-PINILLA, D.F.; MASI, S.; ECHEVERRIA-ARRONDO, C.; AGOURAM, S.; MUNOS-SANJOSE, V.; RODRIGUEZ PEREIRA, J.; MACÁK, J.; MORA-SERO, I.

Released

7. 2. 2021

Publisher

ROYAL SOC CHEMISTRY

Location

CAMBRIDGE

ISBN

2050-7534

Periodical

Journal of Materials Chemistry C

Year of study

9

Number

5

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1555

Pages to

1566

Pages count

12

URL

https://pubs.rsc.org/en/content/articlelanding/2021/TC/D0TC04625F

BibTex

@article{BUT172983,
  author="GUALDRON-REYES, A. and MACIAS-PINILLA, D.F. and MASI, S. and ECHEVERRIA-ARRONDO, C. and AGOURAM, S. and MUNOS-SANJOSE, V. and RODRIGUEZ PEREIRA, J. and MACÁK, J. and MORA-SERO, I.",
  title="Engineering Sr-doping for enabling long-term stable FAPb(1-x)Sr(x)I(3) quantum dots with 100% photoluminescence quantum yield",
  journal="Journal of Materials Chemistry C",
  year="2021",
  volume="9",
  number="5",
  pages="1555--1566",
  doi="10.1039/d0tc04625f",
  issn="2050-7534",
  url="https://pubs.rsc.org/en/content/articlelanding/2021/TC/D0TC04625F"
}