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- PMID: 33270310
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Article: Stable, High‐Efficiency Voltage‐Dependent Color‐Tunable Organic Light‐Emitting Diodes with a Single Tetradentate Platinum(II) Emitter Having Long Operational Lifetime
Title | Stable, High‐Efficiency Voltage‐Dependent Color‐Tunable Organic Light‐Emitting Diodes with a Single Tetradentate Platinum(II) Emitter Having Long Operational Lifetime |
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Authors | |
Keywords | Color‐tunable Organic light‐emitting diodes Single emitters Tetradentate Pt(II) complexes |
Issue Date | 2021 |
Publisher | Wiley - VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/publish/en/journals/alphabeticIndex/2089 |
Citation | Advanced Materials, 2021, v. 33 n. 2, article no. 2004873 How to Cite? |
Abstract | Voltage‐dependent, color‐tunable organic light‐emitting diodes (OLEDs) are appealing tools that can be used for the visualization of electronic output signal of sensors. Nonetheless, the literature‐reported color‐tunable OLEDs that have a simple single‐cell device structure suffer from relatively low efficiency, pronounced efficiency roll‐off, color‐aging, and short operation lifetime, all of which limit their practical applications. Here, a novel co‐host‐in‐double‐emissive‐layer (CHIDEL) device, designed to enhance the performance of color‐tunable OLEDs with the use of a single tetradentate Pt[O^N^C^N] emitter, is described. When Pt‐X‐2 is used as a single emitter in an optimized CHIDEL device, a white OLED with tunable Commission International de I'Eclairage (CIE) coordinates from (0.47, 0.44) at 3 V to (0.36, 0.48) at 11 V, a high color rendering index of 82, and high external quantum efficiency (EQE) of up to 20.75% can be achieved. By using Pt‐X‐4 as a single emitter, the voltage‐dependent color‐tunable CHIDEL device, with CIE coordinates shifted from (0.56, 0.43) at 3 V to (0.42, 0.55) at 11 V, demonstrates a high luminance of beyond 90 000 cd m−2 and a high EQE of 23.23% at a luminance of 1300 cd m−2. A long‐lifetime time to 90% of the initial luminance (LT90) of almost 20 000 h is demonstrated for the color‐tunable OLED with Pt‐X‐4 emitting dopant. |
Persistent Identifier | http://hdl.handle.net/10722/295323 |
ISSN | 2023 Impact Factor: 27.4 2023 SCImago Journal Rankings: 9.191 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Mao, M | - |
dc.contributor.author | Lam, TL | - |
dc.contributor.author | To, WP | - |
dc.contributor.author | Lao, X | - |
dc.contributor.author | Liu, W | - |
dc.contributor.author | Xu, S | - |
dc.contributor.author | Cheng, G | - |
dc.contributor.author | Che, CM | - |
dc.date.accessioned | 2021-01-11T13:58:29Z | - |
dc.date.available | 2021-01-11T13:58:29Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Advanced Materials, 2021, v. 33 n. 2, article no. 2004873 | - |
dc.identifier.issn | 0935-9648 | - |
dc.identifier.uri | http://hdl.handle.net/10722/295323 | - |
dc.description.abstract | Voltage‐dependent, color‐tunable organic light‐emitting diodes (OLEDs) are appealing tools that can be used for the visualization of electronic output signal of sensors. Nonetheless, the literature‐reported color‐tunable OLEDs that have a simple single‐cell device structure suffer from relatively low efficiency, pronounced efficiency roll‐off, color‐aging, and short operation lifetime, all of which limit their practical applications. Here, a novel co‐host‐in‐double‐emissive‐layer (CHIDEL) device, designed to enhance the performance of color‐tunable OLEDs with the use of a single tetradentate Pt[O^N^C^N] emitter, is described. When Pt‐X‐2 is used as a single emitter in an optimized CHIDEL device, a white OLED with tunable Commission International de I'Eclairage (CIE) coordinates from (0.47, 0.44) at 3 V to (0.36, 0.48) at 11 V, a high color rendering index of 82, and high external quantum efficiency (EQE) of up to 20.75% can be achieved. By using Pt‐X‐4 as a single emitter, the voltage‐dependent color‐tunable CHIDEL device, with CIE coordinates shifted from (0.56, 0.43) at 3 V to (0.42, 0.55) at 11 V, demonstrates a high luminance of beyond 90 000 cd m−2 and a high EQE of 23.23% at a luminance of 1300 cd m−2. A long‐lifetime time to 90% of the initial luminance (LT90) of almost 20 000 h is demonstrated for the color‐tunable OLED with Pt‐X‐4 emitting dopant. | - |
dc.language | eng | - |
dc.publisher | Wiley - VCH Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/publish/en/journals/alphabeticIndex/2089 | - |
dc.relation.ispartof | Advanced Materials | - |
dc.subject | Color‐tunable | - |
dc.subject | Organic light‐emitting diodes | - |
dc.subject | Single emitters | - |
dc.subject | Tetradentate Pt(II) complexes | - |
dc.title | Stable, High‐Efficiency Voltage‐Dependent Color‐Tunable Organic Light‐Emitting Diodes with a Single Tetradentate Platinum(II) Emitter Having Long Operational Lifetime | - |
dc.type | Article | - |
dc.identifier.email | Mao, M: maohku@hku.hk | - |
dc.identifier.email | Lam, TL: joeltl@hku.hk | - |
dc.identifier.email | To, WP: kevintwp@hku.hk | - |
dc.identifier.email | Liu, W: wqliu@hku.hk | - |
dc.identifier.email | Xu, S: sjxu@hku.hk | - |
dc.identifier.email | Cheng, G: ggcheng@hku.hk | - |
dc.identifier.email | Che, CM: chemhead@hku.hk | - |
dc.identifier.authority | Lam, TL=rp02782 | - |
dc.identifier.authority | To, WP=rp02410 | - |
dc.identifier.authority | Xu, S=rp00821 | - |
dc.identifier.authority | Cheng, G=rp02145 | - |
dc.identifier.authority | Che, CM=rp00670 | - |
dc.description.nature | postprint | - |
dc.identifier.doi | 10.1002/adma.202004873 | - |
dc.identifier.pmid | 33270310 | - |
dc.identifier.scopus | eid_2-s2.0-85097028544 | - |
dc.identifier.hkuros | 320841 | - |
dc.identifier.volume | 33 | - |
dc.identifier.issue | 2 | - |
dc.identifier.spage | article no. 2004873 | - |
dc.identifier.epage | article no. 2004873 | - |
dc.identifier.isi | WOS:000595209000001 | - |
dc.publisher.place | Germany | - |
dc.identifier.issnl | 0935-9648 | - |