Donor-modified asymmetric N/B/O multi-resonance TADF emitters for high-performance deep-blue OLEDs with the BT.2020 color gamut
Multi-resonance thermally activated delayed fluorescence (MR-TADF) materials of polycyclic heteroaromatics are attractive narrowband emitters in wide-color-gamut organic light-emitting diodes (OLEDs). However, deep-blue MR-TADF emitters with CIE coordinates fulfilling the BT.2020 standard and high e...
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| description | Multi-resonance thermally activated delayed fluorescence (MR-TADF) materials of polycyclic heteroaromatics are attractive narrowband emitters in wide-color-gamut organic light-emitting diodes (OLEDs). However, deep-blue MR-TADF emitters with CIE coordinates fulfilling the BT.2020 standard and high efficiency still remain a significant challenge. Herein, two novel emitters NBO-mSAF and NBO-pSAF were developed by incorporating an electron donor, 10
-spiro[acridine-9,9'-fluorene] (SAF), at the
-position of the oxygen atom and the
-position of the boron atom in the nitrogen/boron/oxygen (N/B/O) ternary doped asymmetric MR skeleton. With appropriate electron-donating capacity and rigid spiro-structure, SAF was selected as the donor so that the long-range charge transfer triplet state (
LRCT) is induced to accelerate the reverse intersystem crossing (RISC) process, while the
LRCT aligns higher than the short-range CT state (
SRCT) of the N/B/O core to retain the MR characters. As a result, these optimized emitters exhibit deep-blue TADF with narrow spectra and a high RISC rate constant of 3.4 × 10
s
. In hyperfluorescence OLEDs with a TADF emitter DMAC-DPS as the sensitizer and PPF as the host, NBO-mSAF and NBO-pSAF achieved maximum external quantum efficiencies (EQE
) of 26.7% and 25.2%. Interestingly, improved performance was realized in a traditional device configuration with a single bipolar host 26DCzPPy but without any sensitizer, where NBO-mSAF realized a higher EQE
of 29.5% and CIE (0.128, 0.114), and NBO-pSAF exhibited an EQE
of 20.5% and CIE of (0.147, 0.048). Narrow full width at half maximum (FWHM) values of 26-28 nm were achieved in both devices. Among all the deep-blue N/B/O type MR-TADF emitters with CIE
≤ 0.15 and CIE
≤ 0.12 ever reported so far, NBO-mSAF exhibited a highest EQE
of 29.5%, which is even higher than those obtained with sensitizers, while the CIE
= 0.048 of the NBO-pSAF device is close to the standard blue (0.046) according to BT.2020, with a decent EQE of 20%. |
| doi_str_mv | 10.1039/d4sc04896b |
| format | Article |
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-spiro[acridine-9,9'-fluorene] (SAF), at the
-position of the oxygen atom and the
-position of the boron atom in the nitrogen/boron/oxygen (N/B/O) ternary doped asymmetric MR skeleton. With appropriate electron-donating capacity and rigid spiro-structure, SAF was selected as the donor so that the long-range charge transfer triplet state (
LRCT) is induced to accelerate the reverse intersystem crossing (RISC) process, while the
LRCT aligns higher than the short-range CT state (
SRCT) of the N/B/O core to retain the MR characters. As a result, these optimized emitters exhibit deep-blue TADF with narrow spectra and a high RISC rate constant of 3.4 × 10
s
. In hyperfluorescence OLEDs with a TADF emitter DMAC-DPS as the sensitizer and PPF as the host, NBO-mSAF and NBO-pSAF achieved maximum external quantum efficiencies (EQE
) of 26.7% and 25.2%. Interestingly, improved performance was realized in a traditional device configuration with a single bipolar host 26DCzPPy but without any sensitizer, where NBO-mSAF realized a higher EQE
of 29.5% and CIE (0.128, 0.114), and NBO-pSAF exhibited an EQE
of 20.5% and CIE of (0.147, 0.048). Narrow full width at half maximum (FWHM) values of 26-28 nm were achieved in both devices. Among all the deep-blue N/B/O type MR-TADF emitters with CIE
≤ 0.15 and CIE
≤ 0.12 ever reported so far, NBO-mSAF exhibited a highest EQE
of 29.5%, which is even higher than those obtained with sensitizers, while the CIE
= 0.048 of the NBO-pSAF device is close to the standard blue (0.046) according to BT.2020, with a decent EQE of 20%.</description><identifier>ISSN: 2041-6520</identifier><identifier>EISSN: 2041-6539</identifier><identifier>DOI: 10.1039/d4sc04896b</identifier><identifier>PMID: 39416297</identifier><language>eng</language><publisher>England: Royal Society of Chemistry</publisher><subject>Asymmetry ; Atomic energy levels ; Boron ; Charge transfer ; Chemistry ; Color ; Configuration management ; Emitters ; Emitters (electron) ; Narrowband ; Nitrogen ; Organic light emitting diodes ; Oxygen ; Quantum efficiency ; Resonance ; Spectral emittance</subject><ispartof>Chemical science (Cambridge), 2024-10, Vol.15 (43), p.18135-18145</ispartof><rights>This journal is © The Royal Society of Chemistry.</rights><rights>Copyright Royal Society of Chemistry 2024</rights><rights>This journal is © The Royal Society of Chemistry 2024 The Royal Society of Chemistry</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c296t-49f6b70dcc434c21cf4a87afe19e83c6c40ed5f481daa1e7996bd95e970c9a153</cites><orcidid>0009-0007-1832-9612 ; 0009-0001-4636-4577 ; 0000-0003-3602-770X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC11472771/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC11472771/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,315,728,781,785,865,886,27929,27930,53796,53798</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/39416297$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Jin, Jing</creatorcontrib><creatorcontrib>He, Zhaolong</creatorcontrib><creatorcontrib>Liu, Di</creatorcontrib><creatorcontrib>Mei, Yongqiang</creatorcontrib><creatorcontrib>Wang, Jiahui</creatorcontrib><creatorcontrib>Wan, Huihui</creatorcontrib><creatorcontrib>Li, Jiuyan</creatorcontrib><title>Donor-modified asymmetric N/B/O multi-resonance TADF emitters for high-performance deep-blue OLEDs with the BT.2020 color gamut</title><title>Chemical science (Cambridge)</title><addtitle>Chem Sci</addtitle><description>Multi-resonance thermally activated delayed fluorescence (MR-TADF) materials of polycyclic heteroaromatics are attractive narrowband emitters in wide-color-gamut organic light-emitting diodes (OLEDs). However, deep-blue MR-TADF emitters with CIE coordinates fulfilling the BT.2020 standard and high efficiency still remain a significant challenge. Herein, two novel emitters NBO-mSAF and NBO-pSAF were developed by incorporating an electron donor, 10
-spiro[acridine-9,9'-fluorene] (SAF), at the
-position of the oxygen atom and the
-position of the boron atom in the nitrogen/boron/oxygen (N/B/O) ternary doped asymmetric MR skeleton. With appropriate electron-donating capacity and rigid spiro-structure, SAF was selected as the donor so that the long-range charge transfer triplet state (
LRCT) is induced to accelerate the reverse intersystem crossing (RISC) process, while the
LRCT aligns higher than the short-range CT state (
SRCT) of the N/B/O core to retain the MR characters. As a result, these optimized emitters exhibit deep-blue TADF with narrow spectra and a high RISC rate constant of 3.4 × 10
s
. In hyperfluorescence OLEDs with a TADF emitter DMAC-DPS as the sensitizer and PPF as the host, NBO-mSAF and NBO-pSAF achieved maximum external quantum efficiencies (EQE
) of 26.7% and 25.2%. Interestingly, improved performance was realized in a traditional device configuration with a single bipolar host 26DCzPPy but without any sensitizer, where NBO-mSAF realized a higher EQE
of 29.5% and CIE (0.128, 0.114), and NBO-pSAF exhibited an EQE
of 20.5% and CIE of (0.147, 0.048). Narrow full width at half maximum (FWHM) values of 26-28 nm were achieved in both devices. Among all the deep-blue N/B/O type MR-TADF emitters with CIE
≤ 0.15 and CIE
≤ 0.12 ever reported so far, NBO-mSAF exhibited a highest EQE
of 29.5%, which is even higher than those obtained with sensitizers, while the CIE
= 0.048 of the NBO-pSAF device is close to the standard blue (0.046) according to BT.2020, with a decent EQE of 20%.</description><subject>Asymmetry</subject><subject>Atomic energy levels</subject><subject>Boron</subject><subject>Charge transfer</subject><subject>Chemistry</subject><subject>Color</subject><subject>Configuration management</subject><subject>Emitters</subject><subject>Emitters (electron)</subject><subject>Narrowband</subject><subject>Nitrogen</subject><subject>Organic light emitting diodes</subject><subject>Oxygen</subject><subject>Quantum efficiency</subject><subject>Resonance</subject><subject>Spectral emittance</subject><issn>2041-6520</issn><issn>2041-6539</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNpdkU1vEzEQhlcIRKvSCz8AWeKCkLbx19rxCTVJW5AiciCcLcc7m3W1XgfbW9QTfx33gwiYy4w0z7yambeq3hJ8QTBTs5Yni_lcid2L6pRiTmrRMPXyWFN8Up2ndItLMEYaKl9XJ0xxIqiSp9WvVRhDrH1oXeegRSbdew85Oou-zhazDfLTkF0dIYXRjBbQ9nJ1jcC7nCEm1IWIerfv6wPEUvtHpAU41LthArRZX60S-ulyj3IPaLG9oJhiZMNQ5vbGT_lN9aozQ4Lz53xWfb--2i4_1-vNzZfl5bq2VIlcc9WJncSttZxxS4ntuJlL0wFRMGdWWI6hbTo-J60xBKQq_2hVA0piqwxp2Fn16Un3MO08tBbGHM2gD9F5E-91ME7_2xldr_fhThPCJZWSFIUPzwox_JggZe1dsjAMZoQwJc0IkYIoxVhB3_-H3oYpjuW-QlHOVCOELNTHJ8rGkFKE7rgNwfrBW73i35aP3i4K_O7v_Y_oHyfZbzccnwo</recordid><startdate>20241007</startdate><enddate>20241007</enddate><creator>Jin, Jing</creator><creator>He, Zhaolong</creator><creator>Liu, Di</creator><creator>Mei, Yongqiang</creator><creator>Wang, Jiahui</creator><creator>Wan, Huihui</creator><creator>Li, Jiuyan</creator><general>Royal Society of Chemistry</general><general>The Royal Society of Chemistry</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0009-0007-1832-9612</orcidid><orcidid>https://orcid.org/0009-0001-4636-4577</orcidid><orcidid>https://orcid.org/0000-0003-3602-770X</orcidid></search><sort><creationdate>20241007</creationdate><title>Donor-modified asymmetric N/B/O multi-resonance TADF emitters for high-performance deep-blue OLEDs with the BT.2020 color gamut</title><author>Jin, Jing ; He, Zhaolong ; Liu, Di ; Mei, Yongqiang ; Wang, Jiahui ; Wan, Huihui ; Li, Jiuyan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c296t-49f6b70dcc434c21cf4a87afe19e83c6c40ed5f481daa1e7996bd95e970c9a153</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>Asymmetry</topic><topic>Atomic energy levels</topic><topic>Boron</topic><topic>Charge transfer</topic><topic>Chemistry</topic><topic>Color</topic><topic>Configuration management</topic><topic>Emitters</topic><topic>Emitters (electron)</topic><topic>Narrowband</topic><topic>Nitrogen</topic><topic>Organic light emitting diodes</topic><topic>Oxygen</topic><topic>Quantum efficiency</topic><topic>Resonance</topic><topic>Spectral emittance</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jin, Jing</creatorcontrib><creatorcontrib>He, Zhaolong</creatorcontrib><creatorcontrib>Liu, Di</creatorcontrib><creatorcontrib>Mei, Yongqiang</creatorcontrib><creatorcontrib>Wang, Jiahui</creatorcontrib><creatorcontrib>Wan, Huihui</creatorcontrib><creatorcontrib>Li, Jiuyan</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Chemical science (Cambridge)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jin, Jing</au><au>He, Zhaolong</au><au>Liu, Di</au><au>Mei, Yongqiang</au><au>Wang, Jiahui</au><au>Wan, Huihui</au><au>Li, Jiuyan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Donor-modified asymmetric N/B/O multi-resonance TADF emitters for high-performance deep-blue OLEDs with the BT.2020 color gamut</atitle><jtitle>Chemical science (Cambridge)</jtitle><addtitle>Chem Sci</addtitle><date>2024-10-07</date><risdate>2024</risdate><volume>15</volume><issue>43</issue><spage>18135</spage><epage>18145</epage><pages>18135-18145</pages><issn>2041-6520</issn><eissn>2041-6539</eissn><abstract>Multi-resonance thermally activated delayed fluorescence (MR-TADF) materials of polycyclic heteroaromatics are attractive narrowband emitters in wide-color-gamut organic light-emitting diodes (OLEDs). However, deep-blue MR-TADF emitters with CIE coordinates fulfilling the BT.2020 standard and high efficiency still remain a significant challenge. Herein, two novel emitters NBO-mSAF and NBO-pSAF were developed by incorporating an electron donor, 10
-spiro[acridine-9,9'-fluorene] (SAF), at the
-position of the oxygen atom and the
-position of the boron atom in the nitrogen/boron/oxygen (N/B/O) ternary doped asymmetric MR skeleton. With appropriate electron-donating capacity and rigid spiro-structure, SAF was selected as the donor so that the long-range charge transfer triplet state (
LRCT) is induced to accelerate the reverse intersystem crossing (RISC) process, while the
LRCT aligns higher than the short-range CT state (
SRCT) of the N/B/O core to retain the MR characters. As a result, these optimized emitters exhibit deep-blue TADF with narrow spectra and a high RISC rate constant of 3.4 × 10
s
. In hyperfluorescence OLEDs with a TADF emitter DMAC-DPS as the sensitizer and PPF as the host, NBO-mSAF and NBO-pSAF achieved maximum external quantum efficiencies (EQE
) of 26.7% and 25.2%. Interestingly, improved performance was realized in a traditional device configuration with a single bipolar host 26DCzPPy but without any sensitizer, where NBO-mSAF realized a higher EQE
of 29.5% and CIE (0.128, 0.114), and NBO-pSAF exhibited an EQE
of 20.5% and CIE of (0.147, 0.048). Narrow full width at half maximum (FWHM) values of 26-28 nm were achieved in both devices. Among all the deep-blue N/B/O type MR-TADF emitters with CIE
≤ 0.15 and CIE
≤ 0.12 ever reported so far, NBO-mSAF exhibited a highest EQE
of 29.5%, which is even higher than those obtained with sensitizers, while the CIE
= 0.048 of the NBO-pSAF device is close to the standard blue (0.046) according to BT.2020, with a decent EQE of 20%.</abstract><cop>England</cop><pub>Royal Society of Chemistry</pub><pmid>39416297</pmid><doi>10.1039/d4sc04896b</doi><tpages>11</tpages><orcidid>https://orcid.org/0009-0007-1832-9612</orcidid><orcidid>https://orcid.org/0009-0001-4636-4577</orcidid><orcidid>https://orcid.org/0000-0003-3602-770X</orcidid><oa>free_for_read</oa></addata></record> |
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| source | DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central Open Access; PubMed Central |
| subjects | Asymmetry Atomic energy levels Boron Charge transfer Chemistry Color Configuration management Emitters Emitters (electron) Narrowband Nitrogen Organic light emitting diodes Oxygen Quantum efficiency Resonance Spectral emittance |
| title | Donor-modified asymmetric N/B/O multi-resonance TADF emitters for high-performance deep-blue OLEDs with the BT.2020 color gamut |
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