Efficient light-emitting diodes based on in-situ self-assembled perovskite nanocrystals

Heyong Wang; Hongling Yu; Xiao-Ke Liu; Feng Gao

doi:10.1117/1.JPE.8.046002

15 December 2018 Efficient light-emitting diodes based on in-situ self-assembled perovskite nanocrystals

Heyong Wang, Hongling Yu, Xiao-Ke Liu, Feng Gao

Author Affiliations +

Journal of Photonics for Energy, Vol. 8, Issue 4, 046002 (December 2018). https://doi.org/10.1117/1.JPE.8.046002

Abstract

We introduce a simple and low-cost approach—drop-coating method—for preparation of in-situ self-assembled perovskite nanocrystals for efficient light-emitting diodes (LEDs). The photoluminescence (PL) spectrum of the self-assembled NFPI₄ nanocrystals thin film prepared by the drop-coating method shows blue shift compared with that of the typical NFPI₄ thin film prepared by the spin-coating method. In addition, the PL spectra of these self-assembled nanocrystals are tuned from 765 to 725 nm by changing usage amounts of the perovskite precursor solution. More importantly, efficient LEDs with external quantum efficiencies up to 6.8% are achieved based on these self-assembled NFPI₄ nanocrystals.

Citation Download Citation

Heyong Wang, Hongling Yu, Xiao-Ke Liu, and Feng Gao "Efficient light-emitting diodes based on in-situ self-assembled perovskite nanocrystals," Journal of Photonics for Energy 8(4), 046002 (15 December 2018). https://doi.org/10.1117/1.JPE.8.046002

Received: 8 September 2018; Accepted: 27 November 2018; Published: 15 December 2018

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