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Although the well\u2010developed colloidal quantum dots (QDs) based on heavy metals such as cadmium and lead are promising candidates for WLEDs, the low CRI still remains a significant limitation. In addition, the severe toxicity of heavy metals greatly limits their widespread use. Herein, the study demonstrates low\u2010cost and environmentally friendly carbon quantum dots (CQDs)\u2010based WLEDs that exhibit a high CRI of 94.33, surpassing that of conventional cadmium\/lead\u2010containing QD\u2010based WLEDs. This achievement is attained through the employment of a binary host\u2010induced exciplex strategy. The high hole\/electron mobility and suitable energy levels of the donor and acceptor give rise to a broadband orange\u2013yellow emission stemming from the exciplex. As the host, the binary exciplex is capable of contributing blue and orange\u2013yellow emission components while efficiently mitigating the aggregation\u2010induced quenching of CQDs. Meanwhile, CQDs effectively address the deep\u2010red emission gap, enabling the realization of CQDs\u2010based WLEDs with high CRI. These WLEDs also exhibit a remarkably low turn\u2010on voltage of 2.8\u00a0V, a maximum luminance exceeding 2000\u00a0cd m<jats:sup>\u2212<\/jats:sup><jats:sup>2<\/jats:sup>, a correlated color temperature of 4976 K, and Commission Internationale de l'Eclairage coordinates of (0.34, 0.32).<\/jats:p>","DOI":"10.1002\/advs.202404485","type":"journal-article","created":{"date-parts":[[2024,6,14]],"date-time":"2024-06-14T00:41:36Z","timestamp":1718325696000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":26,"title":["Binary Host\u2010induced Exciplex Enabled High Color\u2010Rendering Index of 94 for Carbon Quantum Dot\u2010Based White Light\u2010Emitting Diodes"],"prefix":"10.1002","volume":"11","author":[{"given":"Renjing","family":"Chen","sequence":"first","affiliation":[{"name":"College of Physics and Energy Fujian Normal University Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials  Fuzhou 350117 P. 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