Relevance of Optical Design for Optolectronic Devices based on Lead Halide Perovskites
Hernán Míguez a
a INSTITUTO DE CIENCIA DE MATERIALES DE SEVILLA CSIC_US, Calle Américo Vespucio, 49, Sevilla, Spain
Proceedings of Applied Light-Matter Interactions in Perovskite Semiconductors 2021 (ALMIPS2021)
Online, Spain, 2021 October 5th - 7th
Organizers: Rafael Sánchez Sánchez and Miguel Anaya
Invited Speaker, Hernán Míguez, presentation 013
DOI: https://doi.org/10.29363/nanoge.almips.2021.013
Publication date: 23rd September 2021

Control over the interaction of electromagnetic radiation with matter is an essential aspect for the development of efficient optoelectronic devices. A paradigmatic example of this statement can be found in the expression for the difference between the actual open circuit voltage attained from a solar cell, VOC, and the maximum ideal one, VOC*, which is given by:[1]

VOC-VOC*=kBT ln(ηext)       (1)

, where kB stands for the Boltzmann constant, T for temperature and ηext.for the photoluminescence external quantum efficiency. It implies that reaching the Shockley-Queisser limit [2] for a single-junction solar cell requires materials that are simultaneously good light absorbers and emitters (ηext ≈1) under open circuit conditions.

In this talk, the relevance of an adequate optical design for the new generation of devices based on lead halide perovskites will be discussed and illustrated with real-world systems comprising photovoltaic cells and light emitting devices.[3] Particular emphasis will be put in describing the effect of tailoring the local photonic environment of absorbers and emitters on the device performance, which can be achieved by the integration of different types of optical materials in the device, such as photonic crystals,[4] metallic nanoparticles,[5,6] or dielectric scatterers.[7]

 

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