Multi-Layer Optical Model for Core-Shell Metal Oxide Nanocrystals

Nicolò Petrini^a^,^b, Luca Rebecchi^b^,^c, Michele Ghini^c^,^d, Nicola Curreli^b, Ilka Kriegel^b

^aDipartimento di Fisica, Università degli Studi di Genova, Via Dodecaneso 33, 16146 Genova, Italy

^bFunctional Nanosystems, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy

^cDipartimento di Chimica e Chimica Industriale, Università degli Studi di Genova, Via Dodecaneso 31, 16146 Genova, Italy

^dNanochemistry Department, Istituto Italiano di Tecnologia, via Morego 30, 16163 Genova, Italy

Materials for Sustainable Development Conference (MATSUS)
Proceedings of nanoGe Spring Meeting 2022 (NSM22)

#SNI22. Semiconductor Nanocrystals I: Basic Science (synthesis, spectroscopy, electronic structure, device and application)

Online, Spain, 2022 March 7th - 11th

Organizers: Emmanuel Lhuillier, Sandrine Ithurria and Angshuman Nag

Contributed talk, Nicolò Petrini, presentation 154
DOI: https://doi.org/10.29363/nanoge.nsm.2022.154
Publication date: 7th February 2022

Metal oxide (MO) doped semiconductor nanocrystals (NCs) are characterized by tunable optoelectronic properties, which can be modified by appropriate engineering of the NCs geometry, structure and carrier density profile [1]. Their versatility makes them tailorable for specific applications, ranging from electronic [2] and optical devices [3] to energy storage[4].

We report a semi-classical multi-layer optical model that can effectively describe the response of colloidal NCs with different doping profiles in core-shell structures. In particular, we applied our model to the investigation of the multi-peak absorption of Sn-doped Indium Oxide (ITO) NCs. We demonstrate that our model is suitable for predicting the experimentally observed absorption peak splitting, both with variable NCs doping profiles and, post-synthetically, via photodoping. In both cases, we found that depletion layer is fundamental in order to correctly describe the spectrum evolution. We foresee that our model can be employed as a useful tool to design the optoelectronic properties of core-shell NCs systems in the framework of energy band and depletion layer engineering.

References:

[1] C. M. Staller et al., “Tuning Nanocrystal Surface Depletion by Controlling Dopant Distribution as a Route Toward Enhanced Film Conductivity,” Nano Lett., vol. 18, no. 5, pp. 2870–2878, May 2018, doi: 10.1021/acs.nanolett.7b05484.

[2] X. Yu, T. J. Marks, and A. Facchetti, “Metal oxides for optoelectronic applications,” Nat. Mater., vol. 15, no. 4, pp. 383–396, Apr. 2016, doi: 10.1038/nmat4599.

[3] M. Abb, Y. Wang, N. Papasimakis, C. H. de Groot, and O. L. Muskens, “Surface-Enhanced Infrared Spectroscopy Using Metal Oxide Plasmonic Antenna Arrays,” Nano Lett., vol. 14, no. 1, pp. 346–352, Jan. 2014, doi: 10.1021/nl404115g.

[4] T. Gatti et al., “Opportunities from Doping of Non-Critical Metal Oxides in Last Generation Light-Conversion Devices,” Adv. Energy Mater., vol. 11, no. 31, 2021, doi: 10.1002/aenm.202101041.

nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.

MATSUS

Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.

International Conference on Hybrid and Organic Photovoltaics

International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.

Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics

The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.

International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics

The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.