Issue 15, 2023

Stabilizing FASnI3-based perovskite light-emitting diodes with crystallization control

Abstract

The toxicity of lead presents a critical challenge for the application of perovskite optoelectronics. Lead-free perovskite solar cells were achieved with formamidinium tin iodide (FASnI3) perovskites, exhibiting decent power-conversion efficiencies (PCEs) of up to 14%, with >98% of the initial PCE retained after 3000 h of storage. However, when employed in light-emitting applications, FASnI3-based perovskite LEDs (PeLEDs) show limited stability, with T50 lifetimes of up to 0.25 h at 10 mA cm−2. Here, we improve the stability of FASnI3-based PeLEDs through the inclusion of a two-dimensional precursor phenethylamine iodide (PEAI), allowing controlled crystallization of the mixed-dimensional perovskite emitters. The density of defects is found to be reduced, accompanied by the suppression of oxidation from Sn2+ to Sn4+. Using an optimized perovskite composition, we achieve an EQE of 1.5% (a ∼10-fold improvement over the control devices), a maximum radiance of 145 W sr−1 m−2, and a record-long T50 lifetime of 10.3 h at 100 mA cm−2 for FASnI3-based PeLEDs. Our results illuminate an alternative path toward lead-free PeLED applications.

Graphical abstract: Stabilizing FASnI3-based perovskite light-emitting diodes with crystallization control

Supplementary files

Article information

Article type
Paper
Submitted
18 جمادى الثانية 1444
Accepted
03 رمضان 1444
First published
05 رمضان 1444

Nanoscale, 2023,15, 6954-6959

Stabilizing FASnI3-based perovskite light-emitting diodes with crystallization control

G. Zhang, S. Xing, X. Cao, B. Zhao and D. Di, Nanoscale, 2023, 15, 6954 DOI: 10.1039/D3NR00177F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements