Photonic Cavity Effects for Enhanced Efficiency in Layered Perovskite-Based Light-Emitting Diodes

Layered architectures for light-emitting diodes (LEDs) are the standard approach for solution-processable materials such as metal-halide perovskites. Upon designing the composition and thicknesses of the layers forming the LED, the primary focus is typically on the optimization of charge injection a...

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Autores principales:	Lyuye Lin, Remo Proietti Zaccaria, Denis Garoli, Roman Krahne
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	light-emitting diodes perovskite external quantum efficiency Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/c246a092d60d465985afa8f4fb846394
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spelling	oai:doaj.org-article:c246a092d60d465985afa8f4fb8463942021-11-25T18:31:03ZPhotonic Cavity Effects for Enhanced Efficiency in Layered Perovskite-Based Light-Emitting Diodes10.3390/nano111129472079-4991https://doaj.org/article/c246a092d60d465985afa8f4fb8463942021-11-01T00:00:00Zhttps://www.mdpi.com/2079-4991/11/11/2947https://doaj.org/toc/2079-4991Layered architectures for light-emitting diodes (LEDs) are the standard approach for solution-processable materials such as metal-halide perovskites. Upon designing the composition and thicknesses of the layers forming the LED, the primary focus is typically on the optimization of charge injection and balance. However, this approach only considers the process until electrons and holes recombine to generate photons, while for achieving optimized LED performance, the generated light must also be efficiently outcoupled. Our work focuses on the latter aspect. We assume efficient photon generation and analyze the effects of the geometrical configuration together with the dipole orientation, mimicking the light emission, on the main characteristics defining the LED, such as the Purcell effect and the outcoupling efficiency. We find that in-plane dipoles result in significantly increased outcoupling efficiency. Furthermore, the mismatch in refractive index among the layers and their different thicknesses can be tuned to maximize the Purcell effect and minimize internal losses. The combined optimization of dipole orientation and layer thicknesses can improve the efficiency of the LED up to a factor 10, hence highlighting the importance of considering also the photonic properties of the LED structures if the objective is to maximize the LED performance.Lyuye LinRemo Proietti ZaccariaDenis GaroliRoman KrahneMDPI AGarticlelight-emitting diodesperovskiteexternal quantum efficiencyChemistryQD1-999ENNanomaterials, Vol 11, Iss 2947, p 2947 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	light-emitting diodes perovskite external quantum efficiency Chemistry QD1-999
spellingShingle	light-emitting diodes perovskite external quantum efficiency Chemistry QD1-999 Lyuye Lin Remo Proietti Zaccaria Denis Garoli Roman Krahne Photonic Cavity Effects for Enhanced Efficiency in Layered Perovskite-Based Light-Emitting Diodes
description	Layered architectures for light-emitting diodes (LEDs) are the standard approach for solution-processable materials such as metal-halide perovskites. Upon designing the composition and thicknesses of the layers forming the LED, the primary focus is typically on the optimization of charge injection and balance. However, this approach only considers the process until electrons and holes recombine to generate photons, while for achieving optimized LED performance, the generated light must also be efficiently outcoupled. Our work focuses on the latter aspect. We assume efficient photon generation and analyze the effects of the geometrical configuration together with the dipole orientation, mimicking the light emission, on the main characteristics defining the LED, such as the Purcell effect and the outcoupling efficiency. We find that in-plane dipoles result in significantly increased outcoupling efficiency. Furthermore, the mismatch in refractive index among the layers and their different thicknesses can be tuned to maximize the Purcell effect and minimize internal losses. The combined optimization of dipole orientation and layer thicknesses can improve the efficiency of the LED up to a factor 10, hence highlighting the importance of considering also the photonic properties of the LED structures if the objective is to maximize the LED performance.
format	article
author	Lyuye Lin Remo Proietti Zaccaria Denis Garoli Roman Krahne
author_facet	Lyuye Lin Remo Proietti Zaccaria Denis Garoli Roman Krahne
author_sort	Lyuye Lin
title	Photonic Cavity Effects for Enhanced Efficiency in Layered Perovskite-Based Light-Emitting Diodes
title_short	Photonic Cavity Effects for Enhanced Efficiency in Layered Perovskite-Based Light-Emitting Diodes
title_full	Photonic Cavity Effects for Enhanced Efficiency in Layered Perovskite-Based Light-Emitting Diodes
title_fullStr	Photonic Cavity Effects for Enhanced Efficiency in Layered Perovskite-Based Light-Emitting Diodes
title_full_unstemmed	Photonic Cavity Effects for Enhanced Efficiency in Layered Perovskite-Based Light-Emitting Diodes
title_sort	photonic cavity effects for enhanced efficiency in layered perovskite-based light-emitting diodes
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/c246a092d60d465985afa8f4fb846394
work_keys_str_mv	AT lyuyelin photoniccavityeffectsforenhancedefficiencyinlayeredperovskitebasedlightemittingdiodes AT remoproiettizaccaria photoniccavityeffectsforenhancedefficiencyinlayeredperovskitebasedlightemittingdiodes AT denisgaroli photoniccavityeffectsforenhancedefficiencyinlayeredperovskitebasedlightemittingdiodes AT romankrahne photoniccavityeffectsforenhancedefficiencyinlayeredperovskitebasedlightemittingdiodes
_version_	1718411041345372160

Photonic Cavity Effects for Enhanced Efficiency in Layered Perovskite-Based Light-Emitting Diodes

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