Large-Area Organic-Transition Metal Dichalcogenide Hybrid Light-Emitting Device

Jongchan Kim; Siwei Zhang; Shaocong Hou; Byungjun Lee; Guodan Wei; Stephen R. Forrest

doi:10.1021/acsphotonics.1c00047

Large-Area Organic-Transition Metal Dichalcogenide Hybrid Light-Emitting Device

Jongchan Kim, Siwei Zhang, Shaocong Hou, Byungjun Lee, Guodan Wei, Stephen R. Forrest

Department of Integrated Display Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

We demonstrate a hybrid light-emitting device (LED) employing a chemical-vapor-deposition grown, centimeter-scale monolayer of WS2 (mWS2) as the active luminescent material embedded within conductive organic layers. The active area of the hybrid LED is composed of mWS2, located within the organic host matrix, sandwiched between the hole- and electron-transporting organic layers. The mWS2 shows fast exciton decay and efficient light outcoupling compared to the organic dyes used for OLEDs, whereas organic layers enable a precisely controlled, large-area fabrication process. As a result, LEDs with an average external quantum efficiency of 0.3 ± 0.3% and with the highest efficiency of 1% were achieved. Also, we show that negatively charged excitons, also known as trions, are generated in the mWS2 with the injected current, causing an efficiency roll-off at high current densities. Our result introduces a means for incorporating a range of emissive inorganic thin films into an organic device structure, thereby taking advantage of the positive attributes of both material systems.

Original language	English
Pages (from-to)	1152-1158
Number of pages	7
Journal	ACS Photonics
Volume	8
Issue number	4
DOIs	https://doi.org/10.1021/acsphotonics.1c00047
Publication status	Published - 2021 Apr 21

Bibliographical note

Funding Information:
The work was supported by the U.S. Department of Energy (DOE), Office of Basic Energy Sciences, award no. DE-SC0017971, the Army Research Office (ARO), award no. W911NF-17-1-0312 (theory, data analysis, experimental details), and Universal Display Corporation (LED engineering). The authors thank the Lurie Nano Fabrication Facility for device processing.

Publisher Copyright:
© 2021 American Chemical Society.

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Biotechnology
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1021/acsphotonics.1c00047

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title = "Large-Area Organic-Transition Metal Dichalcogenide Hybrid Light-Emitting Device",

abstract = "We demonstrate a hybrid light-emitting device (LED) employing a chemical-vapor-deposition grown, centimeter-scale monolayer of WS2 (mWS2) as the active luminescent material embedded within conductive organic layers. The active area of the hybrid LED is composed of mWS2, located within the organic host matrix, sandwiched between the hole- and electron-transporting organic layers. The mWS2 shows fast exciton decay and efficient light outcoupling compared to the organic dyes used for OLEDs, whereas organic layers enable a precisely controlled, large-area fabrication process. As a result, LEDs with an average external quantum efficiency of 0.3 ± 0.3% and with the highest efficiency of 1% were achieved. Also, we show that negatively charged excitons, also known as trions, are generated in the mWS2 with the injected current, causing an efficiency roll-off at high current densities. Our result introduces a means for incorporating a range of emissive inorganic thin films into an organic device structure, thereby taking advantage of the positive attributes of both material systems.",

author = "Jongchan Kim and Siwei Zhang and Shaocong Hou and Byungjun Lee and Guodan Wei and Forrest, {Stephen R.}",

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AU - Kim, Jongchan

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AU - Hou, Shaocong

AU - Lee, Byungjun

AU - Wei, Guodan

AU - Forrest, Stephen R.

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PY - 2021/4/21

Y1 - 2021/4/21

N2 - We demonstrate a hybrid light-emitting device (LED) employing a chemical-vapor-deposition grown, centimeter-scale monolayer of WS2 (mWS2) as the active luminescent material embedded within conductive organic layers. The active area of the hybrid LED is composed of mWS2, located within the organic host matrix, sandwiched between the hole- and electron-transporting organic layers. The mWS2 shows fast exciton decay and efficient light outcoupling compared to the organic dyes used for OLEDs, whereas organic layers enable a precisely controlled, large-area fabrication process. As a result, LEDs with an average external quantum efficiency of 0.3 ± 0.3% and with the highest efficiency of 1% were achieved. Also, we show that negatively charged excitons, also known as trions, are generated in the mWS2 with the injected current, causing an efficiency roll-off at high current densities. Our result introduces a means for incorporating a range of emissive inorganic thin films into an organic device structure, thereby taking advantage of the positive attributes of both material systems.

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Large-Area Organic-Transition Metal Dichalcogenide Hybrid Light-Emitting Device

Abstract

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