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However, the single\u2010variable response afterglow color changing limits the potential of CDs for multidimensional information encoding and dynamic encryption in complex environments. Here, we report metal\u2010free CDs with triple\u2010variable responses (time, temperature, and excitation wavelength) for multiple dynamic afterglow colors and an ultra\u2010high afterglow brightness (406\u00a0cd m\n                    <jats:sup>\u22122<\/jats:sup>\n                    ) far exceeding those of other afterglow materials. Based on the synergistic effect of triple matrix confinement and interface effects, room\u2011temperature phosphorescence (RTP) and thermally activated delayed fluorescence (TADF) are integrated into a single CD system. Owing to the different lifetimes of the dual\u2010mode afterglow (phosphorescence and TADF) and their varying sensitivities to temperature and excitation wavelength, time\u2010dependent afterglow colors (TDAC), excitation\u2010dependent afterglow colors (EDAC), and thermochromic afterglow (TCAG) are simultaneously achieved. Finally, we also designed a three\u2010dimensional variable\u2010response color code that varies with time, temperature, and excitation wavelength, spanning the entire visible spectrum. This platform enables high\u2010capacity, programmable, full\u2010gamut, and visually intuitive information encryption and display, providing a promising pathway for advanced, multidimensional anti\u2010counterfeiting and secure communication technologies.\n                  <\/jats:p>","DOI":"10.1002\/anie.8266335","type":"journal-article","created":{"date-parts":[[2026,3,8]],"date-time":"2026-03-08T10:51:17Z","timestamp":1772967077000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Triple Matrix Confinement\u2010Induced Ultrabright Afterglow From Carbon Dots With Multivariate Responsive Afterglow Colors for Advanced Dynamic Information Encryption"],"prefix":"10.1002","volume":"65","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1839-7037","authenticated-orcid":false,"given":"Yupeng","family":"Liu","sequence":"first","affiliation":[{"name":"Institute of Applied Physics and Materials Engineering (IAPME) Joint 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