Towards Circularly Polarised Two Dimensional Hybrid Perovskite LEDs
Sean Bourelle a b, Ravichandran Shivanna a, Felix Deschler a
a Optoelectronics Group, Cavendish Laboratory, University of Cambridge, UK., J.J. Thomson Avenue, Cambridge, United Kingdom
b University of Cambridge - UK, The Old Schools, Trinity Ln, Cambridge CB2 1TN, UK, Cambridge, United Kingdom
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
Benidorm, Spain, 2018 May 28th - 31st
Organizers: Emilio Palomares and Rene Janssen
Poster, Sean Bourelle, 299
Publication date: 21st February 2018

Two-dimensional hybrid perovskites are self-assembled quantum well structures that are electronically and spatially separated from one another by organic cations. By varying the precursor stoichiometry, the number of octahedral layers between spacing cations can be altered, resulting in control over the degree of quantum confinement. This quantum confinement leads to strongly excitonic behaviour, which has been exploited in the realization of LED architectures. However, while research on the spin states of bulk perovskites exists, only recently has the potential of 2d perovskites been investigated for use within the field of spintronics. This work analyses the excited state spin dynamics of 2d perovskites by means of circularly polarised femtosecond broadband transient absorption spectroscopy and photoluminescence measurements. We determine excited state spin relaxation lifetimes and analyse their dependence on the number of octahedral layers and choice of organic cations. By finding a balance between PLQE and spin lifetimes, we optimize the perovskite structure required to realize circularly polarised LEDs.

© FUNDACIO DE LA COMUNITAT VALENCIANA SCITO
We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info