Bright and Effectual Perovskite Light-Emitting Electrochemical Cells Leveraging Ionic Additives

Masoud Alahbakhshi; Aditya Mishra; Ross Haroldson; Arthur Ishteev; Jiyoung Moon; Qing Gu; Jason D. Slinker; Anvar A. Zakhidov

doi:10.1021/acsenergylett.9b01925

journal article·2019-12-13

Bright and Effectual Perovskite Light-Emitting Electrochemical Cells Leveraging Ionic Additives

Masoud Alahbakhshi, Aditya Mishra, Ross Haroldson, Arthur Ishteev, Jiyoung Moon, Qing Gu, Jason D. Slinker, Anvar A. Zakhidov

ACS Energy Letters· Volume 4· Issue 12

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Source abstract

Abstract

Perovskite light-emitting diodes (PeLEDs) have drawn considerable attention for their favorable optoelectronic properties. Perovskite light-emitting electrochemical cells (PeLECs)—devices that utilize mobile ions—have recently been reported but have yet to reach the performance of the best PeLEDs. We leveraged a poly(ethylene oxide) electrolyte and a lithium salt in CsPbBr3 thin films to produce PeLECs of improved brightness and efficiency. In particular, we found that a single-layer PeLEC from CsPbBr3:PEO:LiPF6 with 0.5 wt % LiPF6 produced bright (∼15000 cd/m2) electroluminescence of improved efficiency (3.0 Lm/W). To understand this improved performance among PeLECs, we characterized these perovskite thin films with photoluminescence (PL) spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD). These studies revealed that this optimal LiPF6 concentration improves electrical double-layer formation, reduces the occurrence of voids, charge traps, and pinholes, and increases grain size and packing density.

Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Organic Light-Emitting Diodes Research · Conducting polymers and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Electrical and Computer Engineering, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080-3021, United States

Department of Materials Science and Engineering, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080-3021, United States

Department of Physics, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080-3021, United States

Department of Nanophotonics and Metamaterials, ITMO University, St. Petersburg, Moscow 197101, Russia

Laboratory of Advanced Solar Energy, NUST MISiS, Moscow, 119049, Russia

NanoTech Institute, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080-3021, United States

Funding

Welch Foundation · Division of Electrical, Communications and Cyber Systems · Ministry of Education and Science of the Russian Federation · ITMO University · Ministry of Science and Higher Education of the Russian Federation

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