{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,1]],"date-time":"2026-06-01T15:26:24Z","timestamp":1780327584155,"version":"3.54.1"},"reference-count":52,"publisher":"Wiley","issue":"32","license":[{"start":{"date-parts":[[2025,6,10]],"date-time":"2025-06-10T00:00:00Z","timestamp":1749513600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["52273164"],"award-info":[{"award-number":["52273164"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100007129","name":"Natural Science Foundation of Shandong Province","doi-asserted-by":"publisher","award":["ZR2022ZD37"],"award-info":[{"award-number":["ZR2022ZD37"]}],"id":[{"id":"10.13039\/501100007129","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"published-print":{"date-parts":[[2025,8]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    Designing thermally activated delayed fluorescence (TADF) conjugated polymers for solution\u2010processed OLEDs that achieve high efficiency with low efficiency roll\u2010off remains a significant challenge. Here, an intramolecular lock is introduced into the polymeric backbones to restrict the rotation of flexible single bonds in the benzophenone acceptor, thereby significantly suppressing non\u2010radiative transitions caused by molecular relaxation. Additionally, pyrimidine is incorporated into the acceptor to introduce steric hindrance, which synergistically increases the dihedral angle between the acceptor and donor, minimizing the energy difference between singlet and triplet states (\u0394\n                    <jats:italic>E<\/jats:italic>\n                    <jats:sub>ST<\/jats:sub>\n                    ). This acceptor modification also optimizes the excited states, thus enhancing spin\u2010orbit coupling between singlet and triplet states to accelerate the reverse intersystem crossing process. As a result, the polymer (p\u20102PXZ\u2010XN) synthesized based on this strategy exhibits an elevated photoluminescence quantum yield up to 93 \u00b1 2%. Furthermore, the solution\u2010processed OLED employing p\u20102PXZ\u2010XN achieves a record maximum external quantum efficiency (EQE\n                    <jats:sub>max<\/jats:sub>\n                    ) of 25.6% and maintain an EQE of 23.1% at 1000\u00a0cd m\n                    <jats:sup>\u22122<\/jats:sup>\n                    . To our knowledge, both EQE\n                    <jats:sub>max<\/jats:sub>\n                    and EQE at 1000\u00a0cd m\n                    <jats:sup>\u22122<\/jats:sup>\n                    of p\u20102PXZ\u2010XN represent the highest values among the reported conjugated polymers without sensitization.\n                  <\/jats:p>","DOI":"10.1002\/smll.202502892","type":"journal-article","created":{"date-parts":[[2025,6,10]],"date-time":"2025-06-10T10:01:53Z","timestamp":1749549713000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Constructing Intramolecular Locks in the Backbones of TADF Conjugated Polymers for High\u2010Performance Solution\u2010Processed OLEDs"],"prefix":"10.1002","volume":"21","author":[{"given":"Yumeng","family":"Guo","sequence":"first","affiliation":[{"name":"State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology  Beijing 100029 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