Enhanced Luminance of Electrochemical Cells with a Rationally Designed Ionic Iridium Complex and an Ionic Additive

Kristin J. Suhr; Lyndon D. Bastatas; Yulong Shen; Lauren A. Mitchell; Bradley J. Holliday; Jason D. Slinker

doi:10.1021/acsami.6b01816

Enhanced Luminance of Electrochemical Cells with a Rationally Designed Ionic Iridium Complex and an Ionic Additive

Kristin J. Suhr, Lyndon D. Bastatas, Yulong Shen, Lauren A. Mitchell, Bradley J. Holliday, Jason D. Slinker

Chemistry (Twin Cities)

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

48 Scopus citations

Abstract

Light-emitting electrochemical cells (LEECs) offer the potential for high efficiency operation from an inexpensive device. However, long turn-on times and low luminance under steady-state operation are longstanding LEEC issues. Here, we present a single-layer LEEC with a custom-designed iridium(III) complex and a lithium salt additive for enhanced device performance. These devices display reduced response times, modest lifetimes, and peak luminances as high as 5500 cd/m², 80% higher than a comparable device from an unoptimized complex and 50% higher than the salt-free device. Improved device efficiency suggests that salt addition balances space charge effects at the interfaces. Extrapolation suggests favorable half-lives of 120 ± 10 h at 1000 cd/m² and 3800 ± 400 h at 100 cd/m². Overall, complex design and device engineering produce competitive LEECs from simple, single-layer architectures.

Original language	English (US)
Pages (from-to)	8888-8892
Number of pages	5
Journal	ACS Applied Materials and Interfaces
Volume	8
Issue number	14
DOIs	https://doi.org/10.1021/acsami.6b01816
State	Published - Apr 27 2016

Bibliographical note

Funding Information:
J.D.S. acknowledges support from UT Dallas startup funds. B.J.H. gratefully acknowledges the Welch Foundation (F-1631) and the National Science Foundation (CHE-0847763) for financial support of this research.

Publisher Copyright:
© 2016 American Chemical Society.

Keywords

ionic additives
ionic iridium complex
ionic transition metal complex
light-emitting electrochemical cells
luminance
organic light-emitting diodes

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10.1021/acsami.6b01816

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Enhanced Luminance of Electrochemical Cells with a Rationally Designed Ionic Iridium Complex and an Ionic Additive. / Suhr, Kristin J.; Bastatas, Lyndon D.; Shen, Yulong; Mitchell, Lauren A.; Holliday, Bradley J.; Slinker, Jason D.

In: ACS Applied Materials and Interfaces, Vol. 8, No. 14, 27.04.2016, p. 8888-8892.

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

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title = "Enhanced Luminance of Electrochemical Cells with a Rationally Designed Ionic Iridium Complex and an Ionic Additive",

abstract = "Light-emitting electrochemical cells (LEECs) offer the potential for high efficiency operation from an inexpensive device. However, long turn-on times and low luminance under steady-state operation are longstanding LEEC issues. Here, we present a single-layer LEEC with a custom-designed iridium(III) complex and a lithium salt additive for enhanced device performance. These devices display reduced response times, modest lifetimes, and peak luminances as high as 5500 cd/m2, 80% higher than a comparable device from an unoptimized complex and 50% higher than the salt-free device. Improved device efficiency suggests that salt addition balances space charge effects at the interfaces. Extrapolation suggests favorable half-lives of 120 ± 10 h at 1000 cd/m2 and 3800 ± 400 h at 100 cd/m2. Overall, complex design and device engineering produce competitive LEECs from simple, single-layer architectures.",

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AU - Holliday, Bradley J.

AU - Slinker, Jason D.

N1 - Funding Information: J.D.S. acknowledges support from UT Dallas startup funds. B.J.H. gratefully acknowledges the Welch Foundation (F-1631) and the National Science Foundation (CHE-0847763) for financial support of this research. Publisher Copyright: © 2016 American Chemical Society.

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N2 - Light-emitting electrochemical cells (LEECs) offer the potential for high efficiency operation from an inexpensive device. However, long turn-on times and low luminance under steady-state operation are longstanding LEEC issues. Here, we present a single-layer LEEC with a custom-designed iridium(III) complex and a lithium salt additive for enhanced device performance. These devices display reduced response times, modest lifetimes, and peak luminances as high as 5500 cd/m2, 80% higher than a comparable device from an unoptimized complex and 50% higher than the salt-free device. Improved device efficiency suggests that salt addition balances space charge effects at the interfaces. Extrapolation suggests favorable half-lives of 120 ± 10 h at 1000 cd/m2 and 3800 ± 400 h at 100 cd/m2. Overall, complex design and device engineering produce competitive LEECs from simple, single-layer architectures.

AB - Light-emitting electrochemical cells (LEECs) offer the potential for high efficiency operation from an inexpensive device. However, long turn-on times and low luminance under steady-state operation are longstanding LEEC issues. Here, we present a single-layer LEEC with a custom-designed iridium(III) complex and a lithium salt additive for enhanced device performance. These devices display reduced response times, modest lifetimes, and peak luminances as high as 5500 cd/m2, 80% higher than a comparable device from an unoptimized complex and 50% higher than the salt-free device. Improved device efficiency suggests that salt addition balances space charge effects at the interfaces. Extrapolation suggests favorable half-lives of 120 ± 10 h at 1000 cd/m2 and 3800 ± 400 h at 100 cd/m2. Overall, complex design and device engineering produce competitive LEECs from simple, single-layer architectures.

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Enhanced Luminance of Electrochemical Cells with a Rationally Designed Ionic Iridium Complex and an Ionic Additive

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