High-Efficiency Perovskite–Organic Blend Light-Emitting Diodes Featuring Self-Assembled Monolayers as Hole-Injecting Interlayers

Murali Gedda; Despoina Gkeka; Mohamad Insan Nugraha; Alberto D. Scaccabarozzi; Emre Yengel; Jafar I. Khan; Iain Hamilton; Yuanbao Lin; Marielle Deconinck; Yana Vaynzof; Frédéric Laquai; Donal D.C. Bradley; Thomas D. Anthopoulos

doi:10.1002/aenm.202201396

High-Efficiency Perovskite–Organic Blend Light-Emitting Diodes Featuring Self-Assembled Monolayers as Hole-Injecting Interlayers

Murali Gedda^*, Despoina Gkeka, Mohamad Insan Nugraha, Alberto D. Scaccabarozzi, Emre Yengel, Jafar I. Khan, Iain Hamilton, Yuanbao Lin, Marielle Deconinck, Yana Vaynzof, Frédéric Laquai, Donal D.C. Bradley, Thomas D. Anthopoulos^*

^*Corresponding author for this work

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

24 Scopus citations

Abstract

The high photoluminescence efficiency, color purity, extended gamut, and solution processability make low-dimensional hybrid perovskites attractive for light-emitting diode (PeLED) applications. However, controlling the microstructure of these materials to improve the device performance remains challenging. Here, the development of highly efficient green PeLEDs based on blends of the quasi-2D (q2D) perovskite, PEA₂Cs₄Pb₅Br₁₆, and the wide bandgap organic semiconductor 2,7 dioctyl[1] benzothieno[3,2-b]benzothiophene (C₈-BTBT) is reported. The presence of C₈-BTBT enables the formation of single-crystal-like q2D PEA₂Cs₄Pb₅Br₁₆ domains that are uniform and highly luminescent. Combining the PEA₂Cs₄Pb₅Br₁₆:C₈-BTBT with self-assembled monolayers (SAMs) as hole-injecting layers (HILs), yields green PeLEDs with greatly enhanced performance characteristics, including external quantum efficiency up to 18.6%, current efficiency up to 46.3 cd A⁻¹, the luminance of 45 276 cd m⁻², and improved operational stability compared to neat PeLEDs. The enhanced performance originates from multiple synergistic effects, including enhanced hole-injection enabled by the SAM HILs, the single crystal-like quality of the perovskite phase, and the reduced concentration of electronic defects. This work highlights perovskite:organic blends as promising systems for use in LEDs, while the use of SAM HILs creates new opportunities toward simpler and more stable PeLEDs.

Original language	English (US)
Article number	2201396
Journal	Advanced Energy Materials
Volume	13
Issue number	33
DOIs	https://doi.org/10.1002/aenm.202201396
State	Published - Sep 1 2023

Bibliographical note

Funding Information:
M.G. and D.G. contributed equally to this work. This publication is based in part on work supported by the King Abdullah University of Science and Technology (KAUST) Office of Research Administration (ORA) under Award No: OSR‐2016‐CRG5‐3029 and OSR‐CCF‐3079. Baseline funding from KAUST is also acknowledged by DDCB and TDA. This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (ERC Grant Agreement n° 714067, ENERGYMAPS) and the Deutsche Forschungsgemeinschaft (DFG) in the framework of the Special Priority Program (SPP 2196) project PERFECT PVs (#424216076).

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

Keywords

2D perovskites
interlayers
light-emitting diodes
organic semiconductors
self-assembled monolayers

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
General Materials Science

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/aenm.202201396

Cite this

Gedda, M., Gkeka, D., Nugraha, M. I., Scaccabarozzi, A. D., Yengel, E., Khan, J. I., Hamilton, I., Lin, Y., Deconinck, M., Vaynzof, Y., Laquai, F., Bradley, D. D. C., & Anthopoulos, T. D. (2023). High-Efficiency Perovskite–Organic Blend Light-Emitting Diodes Featuring Self-Assembled Monolayers as Hole-Injecting Interlayers. Advanced Energy Materials, 13(33), Article 2201396. https://doi.org/10.1002/aenm.202201396

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title = "High-Efficiency Perovskite–Organic Blend Light-Emitting Diodes Featuring Self-Assembled Monolayers as Hole-Injecting Interlayers",

abstract = "The high photoluminescence efficiency, color purity, extended gamut, and solution processability make low-dimensional hybrid perovskites attractive for light-emitting diode (PeLED) applications. However, controlling the microstructure of these materials to improve the device performance remains challenging. Here, the development of highly efficient green PeLEDs based on blends of the quasi-2D (q2D) perovskite, PEA2Cs4Pb5Br16, and the wide bandgap organic semiconductor 2,7 dioctyl[1] benzothieno[3,2-b]benzothiophene (C8-BTBT) is reported. The presence of C8-BTBT enables the formation of single-crystal-like q2D PEA2Cs4Pb5Br16 domains that are uniform and highly luminescent. Combining the PEA2Cs4Pb5Br16:C8-BTBT with self-assembled monolayers (SAMs) as hole-injecting layers (HILs), yields green PeLEDs with greatly enhanced performance characteristics, including external quantum efficiency up to 18.6%, current efficiency up to 46.3 cd A−1, the luminance of 45 276 cd m−2, and improved operational stability compared to neat PeLEDs. The enhanced performance originates from multiple synergistic effects, including enhanced hole-injection enabled by the SAM HILs, the single crystal-like quality of the perovskite phase, and the reduced concentration of electronic defects. This work highlights perovskite:organic blends as promising systems for use in LEDs, while the use of SAM HILs creates new opportunities toward simpler and more stable PeLEDs.",

keywords = "2D perovskites, interlayers, light-emitting diodes, organic semiconductors, self-assembled monolayers",

author = "Murali Gedda and Despoina Gkeka and Nugraha, {Mohamad Insan} and Scaccabarozzi, {Alberto D.} and Emre Yengel and Khan, {Jafar I.} and Iain Hamilton and Yuanbao Lin and Marielle Deconinck and Yana Vaynzof and Fr{\'e}d{\'e}ric Laquai and Bradley, {Donal D.C.} and Anthopoulos, {Thomas D.}",

note = "Funding Information: M.G. and D.G. contributed equally to this work. This publication is based in part on work supported by the King Abdullah University of Science and Technology (KAUST) Office of Research Administration (ORA) under Award No: OSR‐2016‐CRG5‐3029 and OSR‐CCF‐3079. Baseline funding from KAUST is also acknowledged by DDCB and TDA. This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (ERC Grant Agreement n° 714067, ENERGYMAPS) and the Deutsche Forschungsgemeinschaft (DFG) in the framework of the Special Priority Program (SPP 2196) project PERFECT PVs (#424216076). Publisher Copyright: {\textcopyright} 2022 Wiley-VCH GmbH.",

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doi = "10.1002/aenm.202201396",

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Gedda, M , Gkeka, D , Nugraha, MI, Scaccabarozzi, AD, Yengel, E, Khan, JI, Hamilton, I, Lin, Y, Deconinck, M, Vaynzof, Y, Laquai, F, Bradley, DDC & Anthopoulos, TD 2023, 'High-Efficiency Perovskite–Organic Blend Light-Emitting Diodes Featuring Self-Assembled Monolayers as Hole-Injecting Interlayers', Advanced Energy Materials, vol. 13, no. 33, 2201396. https://doi.org/10.1002/aenm.202201396

TY - JOUR

T1 - High-Efficiency Perovskite–Organic Blend Light-Emitting Diodes Featuring Self-Assembled Monolayers as Hole-Injecting Interlayers

AU - Gedda, Murali

AU - Gkeka, Despoina

AU - Nugraha, Mohamad Insan

AU - Scaccabarozzi, Alberto D.

AU - Yengel, Emre

AU - Khan, Jafar I.

AU - Hamilton, Iain

AU - Lin, Yuanbao

AU - Deconinck, Marielle

AU - Vaynzof, Yana

AU - Laquai, Frédéric

AU - Bradley, Donal D.C.

AU - Anthopoulos, Thomas D.

N1 - Funding Information: M.G. and D.G. contributed equally to this work. This publication is based in part on work supported by the King Abdullah University of Science and Technology (KAUST) Office of Research Administration (ORA) under Award No: OSR‐2016‐CRG5‐3029 and OSR‐CCF‐3079. Baseline funding from KAUST is also acknowledged by DDCB and TDA. This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (ERC Grant Agreement n° 714067, ENERGYMAPS) and the Deutsche Forschungsgemeinschaft (DFG) in the framework of the Special Priority Program (SPP 2196) project PERFECT PVs (#424216076). Publisher Copyright: © 2022 Wiley-VCH GmbH.

PY - 2023/9/1

Y1 - 2023/9/1

N2 - The high photoluminescence efficiency, color purity, extended gamut, and solution processability make low-dimensional hybrid perovskites attractive for light-emitting diode (PeLED) applications. However, controlling the microstructure of these materials to improve the device performance remains challenging. Here, the development of highly efficient green PeLEDs based on blends of the quasi-2D (q2D) perovskite, PEA2Cs4Pb5Br16, and the wide bandgap organic semiconductor 2,7 dioctyl[1] benzothieno[3,2-b]benzothiophene (C8-BTBT) is reported. The presence of C8-BTBT enables the formation of single-crystal-like q2D PEA2Cs4Pb5Br16 domains that are uniform and highly luminescent. Combining the PEA2Cs4Pb5Br16:C8-BTBT with self-assembled monolayers (SAMs) as hole-injecting layers (HILs), yields green PeLEDs with greatly enhanced performance characteristics, including external quantum efficiency up to 18.6%, current efficiency up to 46.3 cd A−1, the luminance of 45 276 cd m−2, and improved operational stability compared to neat PeLEDs. The enhanced performance originates from multiple synergistic effects, including enhanced hole-injection enabled by the SAM HILs, the single crystal-like quality of the perovskite phase, and the reduced concentration of electronic defects. This work highlights perovskite:organic blends as promising systems for use in LEDs, while the use of SAM HILs creates new opportunities toward simpler and more stable PeLEDs.

AB - The high photoluminescence efficiency, color purity, extended gamut, and solution processability make low-dimensional hybrid perovskites attractive for light-emitting diode (PeLED) applications. However, controlling the microstructure of these materials to improve the device performance remains challenging. Here, the development of highly efficient green PeLEDs based on blends of the quasi-2D (q2D) perovskite, PEA2Cs4Pb5Br16, and the wide bandgap organic semiconductor 2,7 dioctyl[1] benzothieno[3,2-b]benzothiophene (C8-BTBT) is reported. The presence of C8-BTBT enables the formation of single-crystal-like q2D PEA2Cs4Pb5Br16 domains that are uniform and highly luminescent. Combining the PEA2Cs4Pb5Br16:C8-BTBT with self-assembled monolayers (SAMs) as hole-injecting layers (HILs), yields green PeLEDs with greatly enhanced performance characteristics, including external quantum efficiency up to 18.6%, current efficiency up to 46.3 cd A−1, the luminance of 45 276 cd m−2, and improved operational stability compared to neat PeLEDs. The enhanced performance originates from multiple synergistic effects, including enhanced hole-injection enabled by the SAM HILs, the single crystal-like quality of the perovskite phase, and the reduced concentration of electronic defects. This work highlights perovskite:organic blends as promising systems for use in LEDs, while the use of SAM HILs creates new opportunities toward simpler and more stable PeLEDs.

KW - 2D perovskites

KW - interlayers

KW - light-emitting diodes

KW - organic semiconductors

KW - self-assembled monolayers

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DO - 10.1002/aenm.202201396

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AN - SCOPUS:85137191373

SN - 1614-6832

VL - 13

JO - Advanced Energy Materials

JF - Advanced Energy Materials

IS - 33

M1 - 2201396

ER -

High-Efficiency Perovskite–Organic Blend Light-Emitting Diodes Featuring Self-Assembled Monolayers as Hole-Injecting Interlayers

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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