The proposed objectives have been achieved through an iterative sequence of six interrelated work packages (WP). As an MSCA Fellow at the University of Cambridge, the fellow has co-authored 18 research articles. State-of-the-art blue perovskite based LEDs (ACS Energy Letters 2019) have been demonstrated. He has developed optical models to describe the behaviour of optoelectronic devices, with a special focus on PeLEDs (ACS Applied Energy Materials 2019; Nature Photonics 2019; Physical Review Letters 2020; ACS Energy Letters 2021). In addition, the fellow has developed new microscopy techniques to understand the interrelation between structural, chemical and photophysical properties of perovskite films (Adv. Mater. 2019; Nature, 2020; ACS Energy Letters 2020, Advanced Functional Materials 2021). These studies have allowed the fellow to elucidate perovskite working mechanisms and design record blue and green perovskite-based LEDs (external quantum efficiencies above 1% and 20%, respectively). Finally, we have developed a new methodology to attain white-light emission from a perovskite based LED. Manuscripts detailing these results are under preparation. The results obtained during this MSCA will support and enhance dozens of publications in the coming years. Cambridge Enterprise, the commercialisation arm of the University of Cambridge, is exploring the patentability of 3 concepts developed during this MSCA.
The fellow has also published two review papers on the emission properties of perovskites under illumination (crucial for LEDs) and on the progress in the perovskite based LED field (Adv. Ener. Materials, 2020; and Adv. Opt. Mater, 2021, respectively) and a comment on best practices to characterise emerging LEDs performance (Nature Photonics 2019). Access to knowledge by all has been guaranteed, divulgating results in open access through the repository of the University of Cambridge.
Results have been also publicised in diverse research forums, allowing the fellow to network with other peers in the field and in the industry. The fellow has presented the results at the MRS Fall Meeting, Boston, 2019, and in specific congresses dealing with perovskite devices such as NIPHO (Seville, 2020). In addition, the fellow has given invited talks at the Meeting of the Spanish Royal Society of Physics (Zaragoza, 2019), NanoMatMol (online 2020) and the LightEm Conference (online 2020), among others. In addition, the fellow has organised different conference symposia (“Strain in Nanomaterials” at the European Physical Society Conference, 2020; and the Meeting of the Association of Spanish Researchers in the UK, Liverpool 2019, among others), including one focused on light-mater interactions in perovskites (NanoGe, October 2021) and is guest-editing a special issue in the Journal of Applied Physics on Emerging Materials and Devices for Efficient Light Generation.
The MSCA Fellowship has represented key support that allowed the fellow to create a strong network and grow as a scholar. He heads the Light Emission Group in the Stranks Laboratory, and, after finalising the Fellowship, he is managing a European project to translate lab-scale devices into a commercial product (€150k). He is also managing two national grants (~£350,000) to install state-of-the-art equipment for the characterisation of emerging emitters.
Communicating science is crucial to engage new generations with research and explain to society how researchers make great use of everyone’s economic efforts to learn about our world and make it a better and more sustainable place to progress. In this regard, during this MSCA, the fellow has participated in 2019, 2020 and 2021 editions of the Physics at Work and Cambridge Science Festival, where talks and experiments were prepared to stimulate interest
