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Zhao L, Roh K, Kacmoli S, Al Kurdi K, Liu X, Barlow S, Marder SR, Gmachl C, Rand BP. Nanosecond-Pulsed Perovskite Light-Emitting Diodes at High Current Density. Adv Mater 2021; 33:e2104867. [PMID: 34477263 DOI: 10.1002/adma.202104867] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 08/02/2021] [Indexed: 06/13/2023]
Abstract
While metal-halide perovskite light-emitting diodes (PeLEDs) hold the potential for a new generation of display and lighting technology, their slow operation speed and response time limit their application scope. Here, high-speed PeLEDs driven by nanosecond electrical pulses with a rise time of 1.2 ns are reported with a maximum radiance of approximately 480 kW sr-1 m-2 at 8.3 kA cm-2 , and an external quantum efficiency (EQE) of 1% at approximately 10 kA cm-2 , through improved device configuration designs and material considerations. Enabled by the fast operation of PeLEDs, the temporal response provides access to transient charge carrier dynamics under electrical excitation, revealing several new electroluminescence quenching pathways. Finally, integrated distributed feedback (DFB) gratings are explored, which facilitate more directional light emission with a maximum radiance of approximately 1200 kW sr-1 m-2 at 8.5 kA cm-2 , a more than two-fold enhancement to forward radiation output.
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Affiliation(s)
- Lianfeng Zhao
- Department of Electrical Engineering, Princeton University, Princeton, NJ, 08544, USA
| | - Kwangdong Roh
- Department of Electrical Engineering, Princeton University, Princeton, NJ, 08544, USA
| | - Sara Kacmoli
- Department of Electrical Engineering, Princeton University, Princeton, NJ, 08544, USA
| | - Khaled Al Kurdi
- School of Chemistry and Biochemistry, Center for Organic Electronics, Georgia Institute of Technology, Atlanta, GA, 30332-0400, USA
| | - Xiao Liu
- Department of Electrical Engineering, Princeton University, Princeton, NJ, 08544, USA
| | - Stephen Barlow
- School of Chemistry and Biochemistry, Center for Organic Electronics, Georgia Institute of Technology, Atlanta, GA, 30332-0400, USA
| | - Seth R Marder
- School of Chemistry and Biochemistry, Center for Organic Electronics, Georgia Institute of Technology, Atlanta, GA, 30332-0400, USA
| | - Claire Gmachl
- Department of Electrical Engineering, Princeton University, Princeton, NJ, 08544, USA
| | - Barry P Rand
- Department of Electrical Engineering, Princeton University, Princeton, NJ, 08544, USA
- Andlinger Center for Energy and the Environment, Princeton University, Princeton, NJ, 08544, USA
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