High performance gold()-based white organic light-emitting devices with extremely small efficiency roll-off
High performance phosphorescent WOLEDs with small efficiency roll-offs ( Δ roll-off ) at practical brightness levels have been constructed based on a traditional dichromatic structure consisting of yellow emission from alkynylgold( iii ) Au-Y and blue emission from FIrpic. The optimized WOLED with m...
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| Veröffentlicht in: | Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2019, Vol.7 (27), p.8457-8464 |
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| container_title | Journal of materials chemistry. C, Materials for optical and electronic devices |
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| creator | Cheung, Wai-Lung Lai, Shiu-Lun Tang, Man-Chung Lee, Chin-Ho Chan, Mei-Yee Yam, Vivian Wing-Wah |
| description | High performance phosphorescent WOLEDs with small efficiency roll-offs (
Δ
roll-off
) at practical brightness levels have been constructed based on a traditional dichromatic structure consisting of yellow emission from alkynylgold(
iii
)
Au-Y
and blue emission from FIrpic. The optimized WOLED with mCP and PYD2Cz as yellow and blue emissive hosts demonstrates a high current efficiency and EQE of 31.8 cd A
−1
and 13.1%, respectively, and a stable cool white emission with CIE coordinates of (0.32 ± 0.02, 0.40 ± 0.01) over a wide luminance range. Unlike some other reported phosphorescent WOLEDs in the literature, our WOLED could operate high efficiencies of 30.4 cd A
−1
and 12.9% even operating at a high practical brightness of 1000 cd m
−2
, giving a small
Δ
roll-off
of only 4%. This performance has been greatly improved over those of control devices with standard TCTA/mCBP hosts as well as with TCTA/[mCBP/PYD2Cz] having a composite blue host. The very short-lived emissive lifetime of only 0.4-0.7 μs for
Au-Y
is a key factor responsible for the small
Δ
roll-off
of the devices. Photoluminescence quantum yield (
Φ
PL
) studies also reveal that the increase in
Φ
PL
of
Au-Y
:mCP due to a more efficient host-emitter energy transfer could lead to a substantial enhancement of the overall performance of the WOLEDs.
WOLEDs based on
Au-Y
and FIrpic demonstrate high current efficiency with ∼4% efficiency roll-off and white emission with CIE coordinates of (0.33, 0.40). |
| doi_str_mv | 10.1039/c9tc01796h |
| format | Article |
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Δ
roll-off
) at practical brightness levels have been constructed based on a traditional dichromatic structure consisting of yellow emission from alkynylgold(
iii
)
Au-Y
and blue emission from FIrpic. The optimized WOLED with mCP and PYD2Cz as yellow and blue emissive hosts demonstrates a high current efficiency and EQE of 31.8 cd A
−1
and 13.1%, respectively, and a stable cool white emission with CIE coordinates of (0.32 ± 0.02, 0.40 ± 0.01) over a wide luminance range. Unlike some other reported phosphorescent WOLEDs in the literature, our WOLED could operate high efficiencies of 30.4 cd A
−1
and 12.9% even operating at a high practical brightness of 1000 cd m
−2
, giving a small
Δ
roll-off
of only 4%. This performance has been greatly improved over those of control devices with standard TCTA/mCBP hosts as well as with TCTA/[mCBP/PYD2Cz] having a composite blue host. The very short-lived emissive lifetime of only 0.4-0.7 μs for
Au-Y
is a key factor responsible for the small
Δ
roll-off
of the devices. Photoluminescence quantum yield (
Φ
PL
) studies also reveal that the increase in
Φ
PL
of
Au-Y
:mCP due to a more efficient host-emitter energy transfer could lead to a substantial enhancement of the overall performance of the WOLEDs.
WOLEDs based on
Au-Y
and FIrpic demonstrate high current efficiency with ∼4% efficiency roll-off and white emission with CIE coordinates of (0.33, 0.40).</description><identifier>ISSN: 2050-7526</identifier><identifier>EISSN: 2050-7534</identifier><identifier>DOI: 10.1039/c9tc01796h</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Brightness ; Current efficiency ; Devices ; Diodes ; Efficiency ; Emission spectra ; Emitters ; Energy transfer ; Gold ; Organic light emitting diodes ; Phosphorescence ; Photoluminescence</subject><ispartof>Journal of materials chemistry. C, Materials for optical and electronic devices, 2019, Vol.7 (27), p.8457-8464</ispartof><rights>Copyright Royal Society of Chemistry 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c318t-4252d49ec2e663d1e6e45c321c1735a27ff807e700a51bbd631c8d2bdcac57a23</citedby><cites>FETCH-LOGICAL-c318t-4252d49ec2e663d1e6e45c321c1735a27ff807e700a51bbd631c8d2bdcac57a23</cites><orcidid>0000-0001-6849-317X ; 0000-0001-8349-4429</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,777,781,4010,27904,27905,27906</link.rule.ids></links><search><creatorcontrib>Cheung, Wai-Lung</creatorcontrib><creatorcontrib>Lai, Shiu-Lun</creatorcontrib><creatorcontrib>Tang, Man-Chung</creatorcontrib><creatorcontrib>Lee, Chin-Ho</creatorcontrib><creatorcontrib>Chan, Mei-Yee</creatorcontrib><creatorcontrib>Yam, Vivian Wing-Wah</creatorcontrib><title>High performance gold()-based white organic light-emitting devices with extremely small efficiency roll-off</title><title>Journal of materials chemistry. C, Materials for optical and electronic devices</title><description>High performance phosphorescent WOLEDs with small efficiency roll-offs (
Δ
roll-off
) at practical brightness levels have been constructed based on a traditional dichromatic structure consisting of yellow emission from alkynylgold(
iii
)
Au-Y
and blue emission from FIrpic. The optimized WOLED with mCP and PYD2Cz as yellow and blue emissive hosts demonstrates a high current efficiency and EQE of 31.8 cd A
−1
and 13.1%, respectively, and a stable cool white emission with CIE coordinates of (0.32 ± 0.02, 0.40 ± 0.01) over a wide luminance range. Unlike some other reported phosphorescent WOLEDs in the literature, our WOLED could operate high efficiencies of 30.4 cd A
−1
and 12.9% even operating at a high practical brightness of 1000 cd m
−2
, giving a small
Δ
roll-off
of only 4%. This performance has been greatly improved over those of control devices with standard TCTA/mCBP hosts as well as with TCTA/[mCBP/PYD2Cz] having a composite blue host. The very short-lived emissive lifetime of only 0.4-0.7 μs for
Au-Y
is a key factor responsible for the small
Δ
roll-off
of the devices. Photoluminescence quantum yield (
Φ
PL
) studies also reveal that the increase in
Φ
PL
of
Au-Y
:mCP due to a more efficient host-emitter energy transfer could lead to a substantial enhancement of the overall performance of the WOLEDs.
WOLEDs based on
Au-Y
and FIrpic demonstrate high current efficiency with ∼4% efficiency roll-off and white emission with CIE coordinates of (0.33, 0.40).</description><subject>Brightness</subject><subject>Current efficiency</subject><subject>Devices</subject><subject>Diodes</subject><subject>Efficiency</subject><subject>Emission spectra</subject><subject>Emitters</subject><subject>Energy transfer</subject><subject>Gold</subject><subject>Organic light emitting diodes</subject><subject>Phosphorescence</subject><subject>Photoluminescence</subject><issn>2050-7526</issn><issn>2050-7534</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNpF0M9LwzAUB_AiCo65i3ch4EWFan40SXuUok4QvMxzSdOXLjNtZ5I5999bncx3ee_w4fvgmyTnBN8SzIo7XUSNiSzE8iiZUMxxKjnLjg83FafJLIQVHicnIhfFJHmf23aJ1uDN4DvVa0Dt4Jqr67RWARq0XdoIaPCt6q1GbrQxhc7GaPsWNfBpNQS0tXGJ4Ct66MDtUOiUcwiMsdpCr3fID86lgzFnyYlRLsDsb0-Tt8eHRTlPX16fnsv7l1Qzksc0o5w2WQGaghCsISAg45pRoolkXFFpTI4lSIwVJ3XdCEZ03tC60UpzqSibJpf73LUfPjYQYrUaNr4fX1aUcp5RUchiVDd7pf0QggdTrb3tlN9VBFc_fVZlsSh_-5yP-GKPfdAH9983-wZj4HLo</recordid><startdate>2019</startdate><enddate>2019</enddate><creator>Cheung, Wai-Lung</creator><creator>Lai, Shiu-Lun</creator><creator>Tang, Man-Chung</creator><creator>Lee, Chin-Ho</creator><creator>Chan, Mei-Yee</creator><creator>Yam, Vivian Wing-Wah</creator><general>Royal Society of Chemistry</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7U5</scope><scope>8FD</scope><scope>L7M</scope><orcidid>https://orcid.org/0000-0001-6849-317X</orcidid><orcidid>https://orcid.org/0000-0001-8349-4429</orcidid></search><sort><creationdate>2019</creationdate><title>High performance gold()-based white organic light-emitting devices with extremely small efficiency roll-off</title><author>Cheung, Wai-Lung ; Lai, Shiu-Lun ; Tang, Man-Chung ; Lee, Chin-Ho ; Chan, Mei-Yee ; Yam, Vivian Wing-Wah</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c318t-4252d49ec2e663d1e6e45c321c1735a27ff807e700a51bbd631c8d2bdcac57a23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Brightness</topic><topic>Current efficiency</topic><topic>Devices</topic><topic>Diodes</topic><topic>Efficiency</topic><topic>Emission spectra</topic><topic>Emitters</topic><topic>Energy transfer</topic><topic>Gold</topic><topic>Organic light emitting diodes</topic><topic>Phosphorescence</topic><topic>Photoluminescence</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cheung, Wai-Lung</creatorcontrib><creatorcontrib>Lai, Shiu-Lun</creatorcontrib><creatorcontrib>Tang, Man-Chung</creatorcontrib><creatorcontrib>Lee, Chin-Ho</creatorcontrib><creatorcontrib>Chan, Mei-Yee</creatorcontrib><creatorcontrib>Yam, Vivian Wing-Wah</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of materials chemistry. C, Materials for optical and electronic devices</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Cheung, Wai-Lung</au><au>Lai, Shiu-Lun</au><au>Tang, Man-Chung</au><au>Lee, Chin-Ho</au><au>Chan, Mei-Yee</au><au>Yam, Vivian Wing-Wah</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>High performance gold()-based white organic light-emitting devices with extremely small efficiency roll-off</atitle><jtitle>Journal of materials chemistry. C, Materials for optical and electronic devices</jtitle><date>2019</date><risdate>2019</risdate><volume>7</volume><issue>27</issue><spage>8457</spage><epage>8464</epage><pages>8457-8464</pages><issn>2050-7526</issn><eissn>2050-7534</eissn><abstract>High performance phosphorescent WOLEDs with small efficiency roll-offs (
Δ
roll-off
) at practical brightness levels have been constructed based on a traditional dichromatic structure consisting of yellow emission from alkynylgold(
iii
)
Au-Y
and blue emission from FIrpic. The optimized WOLED with mCP and PYD2Cz as yellow and blue emissive hosts demonstrates a high current efficiency and EQE of 31.8 cd A
−1
and 13.1%, respectively, and a stable cool white emission with CIE coordinates of (0.32 ± 0.02, 0.40 ± 0.01) over a wide luminance range. Unlike some other reported phosphorescent WOLEDs in the literature, our WOLED could operate high efficiencies of 30.4 cd A
−1
and 12.9% even operating at a high practical brightness of 1000 cd m
−2
, giving a small
Δ
roll-off
of only 4%. This performance has been greatly improved over those of control devices with standard TCTA/mCBP hosts as well as with TCTA/[mCBP/PYD2Cz] having a composite blue host. The very short-lived emissive lifetime of only 0.4-0.7 μs for
Au-Y
is a key factor responsible for the small
Δ
roll-off
of the devices. Photoluminescence quantum yield (
Φ
PL
) studies also reveal that the increase in
Φ
PL
of
Au-Y
:mCP due to a more efficient host-emitter energy transfer could lead to a substantial enhancement of the overall performance of the WOLEDs.
WOLEDs based on
Au-Y
and FIrpic demonstrate high current efficiency with ∼4% efficiency roll-off and white emission with CIE coordinates of (0.33, 0.40).</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><doi>10.1039/c9tc01796h</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0001-6849-317X</orcidid><orcidid>https://orcid.org/0000-0001-8349-4429</orcidid></addata></record> |
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| identifier | ISSN: 2050-7526 |
| ispartof | Journal of materials chemistry. C, Materials for optical and electronic devices, 2019, Vol.7 (27), p.8457-8464 |
| issn | 2050-7526 2050-7534 |
| language | eng |
| recordid | cdi_proquest_journals_2255426979 |
| source | Royal Society Of Chemistry Journals 2008- |
| subjects | Brightness Current efficiency Devices Diodes Efficiency Emission spectra Emitters Energy transfer Gold Organic light emitting diodes Phosphorescence Photoluminescence |
| title | High performance gold()-based white organic light-emitting devices with extremely small efficiency roll-off |
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