Publication detail

The Role of Alkylammonium Bromides on the Surface Passivation of Stable Alcohol-Dispersed CsPbX3 Nanocrystals and on the Stability Enhancement in Light-Emitting Applications

Uribe-Vegas, P. Villanueva-Antolí, A. Segura, C. Werlinger, F. Aliaga, KR. Caprile, R. Trofymchuk, OS. Flores, ME. Osorio-Román, IO. Echeverría-Arrondo, C. Das Adhikari, S. Selmi, O. Seró, IM. Rodriguez-Pereira, J. Pradhan, B. Paulus, M. Sternemann, C. Hofkens, J. Martinez, J. Masi, S. Gualdrón-Reyes, A.F.

Original Title

The Role of Alkylammonium Bromides on the Surface Passivation of Stable Alcohol-Dispersed CsPbX3 Nanocrystals and on the Stability Enhancement in Light-Emitting Applications

Type

journal article in Web of Science

Language

English

Original Abstract

The ligand passivation is considered an attractive strategy to prepare high-quality perovskite nanocrystals (PNCs) with improved photophysical features in polar media. However, the long-term stabilization of PNCs in these environments is still challenging, being pivotal to understanding the protection mechanism given by prominent surface ligands and avoiding material deterioration in polar solvents. In this work, how the nature of diverse alkylammonium bromides used during surface passivation influences the photophysical properties and quality of CsPbX3 PNCs fully dispersed in alcohol environments, exhibiting stability up to 10 months are investigated. By adding didodecyldimethylammonium benzyldodecyldimethylammonium and tetrabutylammonium bromides (DDAB, BDAB, and TBAB, respectively), DDAB and BDAB promote a suitable and partial surface coverage are observed, respectively, suppressing defect sites in the nanocrystals. Conversely, TBAB shows poor surface protection, decreasing the PL features of PNCs. The presence of DDAB and BDAB favors the fabrication of color converters, and efficient light-emitting diodes (LEDs) with external quantum efficiencies (EQE) of approximate to 23%. Interestingly, significant device stability with BDAB capping shows an LED half-life of 20-fold longer than for DDAB. This contribution offers a promising approach for preparing highly luminescent and stable alcohol-dispersed PNCs, useful for fabricating efficient optoelectronic devices.

Keywords

alcohol-stable nanocrystals; color converters; light-emtting diodes; surface passivation; steric hindrance

Authors

Uribe-Vegas, P.; Villanueva-Antolí, A.; Segura, C.; Werlinger, F.; Aliaga, KR.; Caprile, R.; Trofymchuk, OS.; Flores, ME.; Osorio-Román, IO.; Echeverría-Arrondo, C.; Das Adhikari, S.; Selmi, O.; Seró, IM.; Rodriguez-Pereira, J.; Pradhan, B.; Paulus, M.; Sternemann, C.; Hofkens, J.; Martinez, J.; Masi, S.; Gualdrón-Reyes, A.F.

Released

1. 11. 2024

Publisher

WILEY-V C H VERLAG GMBH

Location

WEINHEIM

ISBN

2195-1071

Periodical

Advanced Optical Materials

Year of study

12

Number

31

State

Federal Republic of Germany

Pages count

12

URL

https://onlinelibrary.wiley.com/doi/10.1002/adom.202401475

BibTex

@article{BUT189713,
  author="Andres F. {Gualdron-Reyes} and Jhonatan {Rodriguez Pereira} and Uribe-Vegas {Pablo} and Alexis {Villanueva-Antoli} and Camilo {Segura} and Francisca {Werlinger} and Karen R. {Aliaga} and Renato {Caprile} and Oleksandra S. {Trofymchuk} and Mario E. {Flores} and Igor O. {Osorio-Román} and Carlos {Echeverría-Arrondo} and Samrat Das {Adhikari} and Olfa {Selmi} and Iván Mora {Seró} and Bapi {Pradhan} and Michael {Paulus} and Christian {Sternemann} and Johan {Hofkens} and Javier {Martinez} and Sofia {Masi}",
  title="The Role of Alkylammonium Bromides on the Surface Passivation of Stable Alcohol-Dispersed CsPbX3 Nanocrystals and on the Stability Enhancement in Light-Emitting Applications",
  journal="Advanced Optical Materials",
  year="2024",
  volume="12",
  number="31",
  pages="12",
  doi="10.1002/adom.202401475",
  issn="2195-1071",
  url="https://onlinelibrary.wiley.com/doi/10.1002/adom.202401475"
}

Responsibility: Ing. Marek Strakoš