Enhancing Surface Stability ofCsPbX3 (X=Cl, Br, I) Perovskite Quantum Dots for Optoelectronic Applications

Ana Flavia Nogueira^a, Luiz G. Bonato^a, Jilian Nei de Freitas^a, Emre Yassitepe^a, Lazaro Padilha^b, Oleksandr Voznyy^c, Younghoon Kim^c, Edward H. Sargent^c, Zhenyu Yang^c

^aInstitute of Chemistry, University of Campinas – UNICAMP, Campinas, SP, Brazil. Fax: 55 19 3521 3023; Tel: 55 19 3521 3029, Brazil

^bInstituto de Fisica "Gleb Wataghin", Universidade Estadual de Campinas, C. P. 6165, 13083-970 Campinas, Sao Paulo

^cUniversity of Toronto, King's College Road, 10, Toronto, Canada

NIPHO
Proceedings of Perovskite Thin Film Photovoltaics (ABXPV16)

Barcelona, Spain, 2016 March 3rd - 4th

Organizers: Emilio Palomares and Nam-Gyu Park

Oral, Ana Flavia Nogueira, presentation 072
Publication date: 14th December 2015

CsPbX3 (X=Cl, Br, I) perovskite quantum dots (PQDs) are synthesized via a novel halide precursor allowing solely carboxylic acid capped dots. The PQDs show enhanced surface stability against degradationwith successive purification steps. Here we will demonstrate the application of CsPbX3 PQDs in light emitting diodes and hybrid(polymer:PQD) solar cell applications. The partial detachment of ligands during purification allowed solution processing light emitting diode fabrication. All inorganicPQDs show high brightness and realized in RGB(Red, Green and Blue) light-emitting diodes with 0.32% external quantum efficiency at 510 nm.We form hybrid nanocomposites by blending conjugated polymers and PQDs in solutions. The mixtures show high colloidal stability and preserving the PQD properties. We will demonstrate the first results about application of these hybrid nanocomposites in solar cells.

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