Composite Approach for Layered Hybrid Perovskites: Band Alignment, Quantum and Dielectric Confinements

Boubacar Traore^a^,^b, Laurent Pedesseau^b, Linda Assam^b^,^c, Xiaoyang Che^a^,^b, Jean-Christophe Blancon^d, Hsinhan Tsai^d^,^e, Wanyi Nie^d, Constantinos Stoumpos^f, Mercouri Kanatzidis^f^,^g, Sergei Tretiak^d, Aditya Mohite^d^,^h, Jacky Even^b, Mikaël Képénékian^a, Claudine Katan^a

^aInstitut des Sciences Chimiques de Rennes, CNRS, Université de Rennes 1, Ecole Nationale Supérieure de Chimie de Rennes, INSA Rennes, Rennes, France

^bUniv Rennes, INSA Rennes, CNRS, Institut FOTON - UMR6082, France, France

^cTOTAL SA, Tour Coupole, 2 place Jean Miller - La Défense 6 - Courbevoie, France

^dLos Alamos National Laboratory, US, MS-J567, Los Alamos, NM 87545, United States

^eDepartment of Materials Science and Nanoengineering, Rice University, Houston, US, United States

^fDepartment of Chemistry, Northwestern University, United States, Sheridan Road, 2145, Evanston, United States

^gArgonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Evanston, Illinois, EE. UU., Evanston, United States

^hDepartment of Chemical and Biomolecular Engineering, Rice University, Houston, US, United States

Materials for Sustainable Development Conference (MATSUS)
Proceedings of nanoGe Fall Meeting 2018 (NFM18)

S7 Fundamental Aspects of Perovskite Solar Cells and Optoelectronics

Torremolinos, Spain, 2018 October 22nd - 26th

Organizers: Laura Herz and Tze-Chien Sum

Poster, Laurent Pedesseau, 174
Publication date: 6th July 2018

Layered hybrid perovskites have recently re-emerged as potential technological viable solutions for photovoltaic and optoelectronic applications. Their environmental stability and immunity to moisture coupled to their exciting optoelectronic properties, have given them a new opportunity in the search of efficient solar cell and light emitting devices [1,2]. Understanding their fundamental optical and electronic properties will be important for optimization. To this aim, we present a systematic theoretical method that considers layered perovskites as composite materials in which band alignment between the perovskite and organic layers becomes affordable [3,4]. Such an alignment is an important performance criterion in the operation of optoelectronic devices. We investigate effects such as the thickness of the perovskite well, its chemical composition and the length of the organic barrier on the confinement potentials [4]. Moreover, we extend the method to inspect dielectric profiles with the salient feature of allowing the clear identification of the contributions of the perovskite and organic layers to the total dielectric profile [4]. Finally, with the insight gained from the different effects on band alignments, we propose design guidelines with the aim of achieving efficient optoelectronic devices. Hence, using the composite approach, we establish alternative theoretical methods to investigate the properties of layered perovskites and forecast that the approach will be relevant to inspect other 2D materials.

1) Tsai et al. “High-efficiency two-dimensional Ruddlesden–Popper perovskite solar cells” , Nature, 536, 312, 2016.

2) Mao et al., “Tunable White-Light Emission in Single-Cation-Templated Three- Layered 2D Perovskites (CH₃CH₂NH₃)₄Pb₃ Br_10−xCl_x”, J. Am. Chem. Soc., 139, 11956, 2017.

3) Even et al., “Understanding Quantum Confinement of Charge Carriers in Layered 2D Hybrid Perovskites”, ChemPhysChem, 15, 3733, 2014.

4) B. Traore et al., “Composite Nature of Layered Hybrid Perovskites: Assessment on Quantum and Dielectric Confinements and Band Alignment”, ACS Nano, 12, 3321, 2018.

This project has received funding from the European Union’s Horizon 2020 programme, through a FET Open research and innovation action under the grant agreement No 687008.

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.