High-yield visible-to-ultraviolet upconversion by ZnSe quantum dots with dynamic triplet transfer.

Xin Zhang, Rongxin Zhang, Lei Wang, Feng Chen, Shan He, Zihao Xu, Zhigang Xia, Guijie Liang

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Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

8 authors.

Xin Zhang *Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang, China. xinzhang@hbuas.edu.cn.ORCID http://orcid.org/0000-0003-1267-403X

Rongxin Zhang *Hubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang, China.

Lei WangHubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang, China.

Feng ChenHubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang, China.

Shan HeDepartment of Chemistry and the Hong Kong Branch of the Chinese National Engineering Research Center for Tissue Restoration and Reconstruction, The Hong Kong University of Science and Technology, Kowloon, China. shanhe@ust.hk.

Zihao XuHuairou Research Center, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China. zihaoxu@iccas.ac.cn.ORCID http://orcid.org/0000-0003-0805-8533

Zhigang XiaState Key Laboratory of New Textile Materials and Advanced Processing, Wuhan Textile University, Wuhan, China.

Guijie LiangHubei Key Laboratory of Low Dimensional Optoelectronic Materials and Devices, Hubei University of Arts and Science, Xiangyang, China. guijie-liang@hbuas.edu.cn.ORCID http://orcid.org/0000-0003-3005-5929

Funding

National Natural Science Foundation of China (National Science Foundation of China) 22403097National Natural Science Foundation of China (National Science Foundation of China) 22572046, 22279031

6 · The paper itself

Abstract

Triplet-triplet annihilation upconversion sensitized by quantum dot is often limited by the short exciton lifetime, necessitating tethered triplet transmitter. Here, we report a transmitter-free system of ZnSe quantum dot and 2,5-diphenyloxazole achieving 24% upconversion quantum yield, the highest for quantum dot sensitization upconversion. The upconversion quantum yield peaks at 30 mM 2,5-diphenyloxazole. Transient spectroscopy shows the triplet energy transfer efficiency is over 80% regardless of the 2,5-diphenyloxazole concentration, but the triplet-triplet annihilation efficiency dominates the overall upconversion quantum yield and shows a strong dependence on the 2,5-diphenyloxazole concentration that increases first from 10% to 25%, then decreases. The optimal concentration is achieved when the triplet 2,5-diphenyloxazole collision probability is highest, thus ensuring a maximum triplet-triplet annihilation efficiency. This work demonstrates a design principle of binary quantum dot upconversion system and reveals the critical role of modulating emitter concentration for optimal upconversion quantum yield.

Identifiers

PMID42469252

DOI10.1038/s41467-026-75613-5

PMCPMC13493803

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LicenceCC BY

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.