Blue perovskite light-emitting diodes with suppressed field-induced segregation
Tatiana Liashenko a, Anatoly Pushkarev a, Sergey Makarov a
a ITMO University, St. Petersburg, Russia, 49 Kronverkskii Avenue, St. Petersburg, Russian Federation
nanoGe Perovskite Conferences
Proceedings of International Conference on Perovskite Thin Film Photovoltaics and Perovskite Photonics and Optoelectronics (NIPHO20)
Sevilla, Spain, 2020 February 23rd - 25th
Organizer: Hernán Míguez
Poster, Tatiana Liashenko, 091
Publication date: 25th November 2019

Inorganic lead halide perovskites CsPbX3 (X = Br, Cl or I) have received significant attention due to their astounding optoelectronic properties such as high photoluminescence quantum yield [1], high electron-hole mobility, narrow emission line width [2] and other characteristics. Moreover, their direct band gap [3] can be widely tunable via halide X exchange reaction [4] to cover the entire visible spectrum that allows controlling emission colors of perovskite luminescence. The exceptional properties of halide perovskites make them attractive candidates for various optoelectronic applications such as light-emitting diodes (LEDs), lasers, optical sensors, photodetectors etc. So far, the outstanding performance was achieved for red‐ and green‐emissive PeroLEDs (external quantum efficiencies (EQE) have exceeded 20 %) [5], whereas high efficiency, long-term stability and high material quality of blue electroluminescent (EL) devices still remain challenging. In this work, we report the efficient single-layer blue PeroLEDs based on a composite 3D CsPbBr2Cl:PEO (PEO - poly(ethylene oxide)) thin films and 2D Ruddlesden–Popper perovskites Cs5Pb4Br8Cl5:PEO and Cs4Pb3Br6Cl4:PEO with suppressed segregation and  study their structure, photoluminescence, and electroluminescence.

T.G.L,  A.P.P, and S.V.M acknowledge the Russian Science Foundation (project No. 19-73-30023) for the synthesis of perovskite films and supporting samples characterization.

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