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Herein, we propose the first case of thermally activated delayed fluorescence (TADF) dendronized \u03c0\u2010conjugated polymers (DCPs) that involve embedding TADF moiety into \u03c0\u2010conjugated backbones and grafting bulk dendritic substituent group onto sidechain. Due to the steric shielding effect of peripheral dendrons on TADF emission core, the inherent exciton aggregation\u2010induced concentration quenching of chromophores can be effectively mitigated, and thus maintaining superior photoluminescence quantum yields of over 80% in neat films. Furthermore, the carrier motilities of second\u2010generation TADF DCP emitter,\n                    <jats:bold>PDB3Cz<\/jats:bold>\n                    , can reach 1.02 \u00d7 10\n                    <jats:sup>\u22122<\/jats:sup>\n                    cm\n                    <jats:sup>2<\/jats:sup>\n                    V\n                    <jats:sup>\u22121<\/jats:sup>\n                    s\n                    <jats:sup>\u22121<\/jats:sup>\n                    together with preponderant horizontal dipole ratios of 80%, which are derived from the vertically aligned conjugated backbones of TADF DCPs and extendedly paralleled pendant TADF moieties to the substrate, respectively. As a result, the solution\u2010processed non\u2010doped PLEDs based on\n                    <jats:bold>PDB3Cz<\/jats:bold>\n                    achieve state\u2010of\u2010the\u2010art device performances with attractive maximum external quantum efficiency of 27.5%, which is the highest values among non\u2010doped TADF PLEDs.\n                  <\/jats:p>","DOI":"10.1002\/adma.75176","type":"journal-article","created":{"date-parts":[[2026,9,28]],"date-time":"2026-09-28T07:51:42Z","timestamp":1790581902000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Constructing Thermally Activated Delayed Fluorescence Dendronized \u03c0\u2010Conjugated Polymers for Efficient Non\u2010Doped Polymer Light\u2010Emitting Diodes"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0009-0007-8105-0913","authenticated-orcid":false,"given":"Kun","family":"Shi","sequence":"first","affiliation":[{"name":"Department Key Laboratory of Rubber\u2010Plastics Ministry of Education\/Shandong Provincial Key Laboratory of Rubber\u2010Plastics School of Polymer Science and Engineering\/State Key Laboratory of Advanced Optical Polymer and Manufacturing Technology Qingdao University of Science &amp; Technology  Qingdao P. 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