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oai:figshare.com:article/34037269 2026-10-01T00:05:12Z category_1 category_915 category_7 category_21 category_873 category_39 category_45 category_62 category_69 category_128 portal_63 item_type_6 month_year_10_2026

Nonthermalized Multiple Localized States Enable Efficient and Stable White-Light-Emitting Quantum Dots Jiakuan Zhang (16323262) Peipei Jin (662636) Boyi Xu (10429389) Jing Wang (6206297) Jiongzhao Li (5106158) Xing Lin (534240) Haiyan Qin (1371060) Haiming Zhu (1376211) Xiaogang Peng (620234) Biophysics Physical Sciences not elsewhere classified Medicine Biotechnology Chemical Sciences not elsewhere classified Ecology Sociology Marine Biology Inorganic Chemistry Hematology unity quantum yield nonradiative trap manifolds blue gan chip single quantum dot qd produces efficient optoelectronic qd materials nonthermalized localized states pl full width low synthetic reproducibility trap states near localized states single type shell qd x </ valid paradigm ultrabroad emission two parallel stable white stable warm robust operation recombination kinetics radiatively recombines plug efficiency photon qy photogenerated holes optical stress nonequilibrated dual like state kinetically isolated inherently relies half maximum distinct formation conventionally regarded controllably partitioned 50 %. 1 –< Broadband emission from single quantum dot (QD) inherently relies on localized states that are conventionally regarded as nonradiative trap manifolds and suffer from low synthetic reproducibility. Here we show that photogenerated holes in a AgIn_<i>x</i>Ga_1–<i>x</i>S₂/ZnS core/shell QD can be controllably partitioned into two parallel, kinetically isolated, and nonthermalized localized states, each of which then radiatively recombines with the delocalized electron with distinct formation and recombination kinetics. The high-energy and low-energy photoluminescence (PL) peaks are related to a small-polaron-like state in the core and a manifold of trap states near the core–shell boundary, respectively. The nonequilibrated dual-state architecture yields composition-tunable and ultrabroad emission with a PL full width at half maximum (fwhm) of 120–130 nm, near-unity quantum yield (QY), negligible Urbach tail, and robust operation under thermal and optical stress. Integrated with a blue GaN chip, a single type of QD produces efficient and stable warm-white light with a wall-plug efficiency as ∼150 lm W^–1 and an electron-to-photon QY > 50%. Our results indicate localized states should be revisited as a valid paradigm for optoelectronic QD materials. 2026-09-30T00:00:00Z Text Journal contribution 10.1021/jacs.6c13849.s001 https://figshare.com/articles/journal_contribution/Nonthermalized_Multiple_Localized_States_Enable_Efficient_and_Stable_White-Light-Emitting_Quantum_Dots/34037269 CC BY-NC 4.0