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Controllable and large-scale synthesis of carbon quantum dots for efficient solid-state optical devices

Li, Weihua (författare)
College of Textiles and Clothes, State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Physics, University Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, P.R. China
Wang, Xiaohan (författare)
College of Textiles and Clothes, State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Physics, University Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, P.R. China
Lin, Jishuai (författare)
College of Textiles and Clothes, State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Physics, University Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, P.R. China
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Meng, Xiangyong (författare)
College of Textiles and Clothes, State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Physics, University Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, P.R. China
Wang, Lihua (författare)
College of Textiles and Clothes, State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Physics, University Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, P.R. China
Wang, Maorong (författare)
College of Textiles and Clothes, State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Physics, University Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, P.R. China
Jing, Qiang (författare)
College of Textiles and Clothes, State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Physics, University Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, P.R. China
Song, Yang (författare)
College of Textiles and Clothes, State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Physics, University Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, P.R. China
Vomiero, Alberto (författare)
Luleå tekniska universitet,Materialvetenskap,Department of Molecular Sciences and Nanosystems, Ca' Foscari University of Venice Via Torino 155, 30172 Venezia Mestre, Italy
Zhao, Haiguang (författare)
College of Textiles and Clothes, State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Physics, University Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, No. 308 Ningxia Road, Qingdao 266071, P.R. China
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College of Textiles and Clothes, State Key Laboratory of Bio-Fibers and Eco-Textiles, College of Physics, University Industry Joint Center for Ocean Observation and Broadband Communication, Qingdao University, No 308 Ningxia Road, Qingdao 266071, P.R. China Materialvetenskap (creator_code:org_t)
Elsevier Ltd, 2024
2024
Engelska.
Ingår i: Nano Energy. - : Elsevier Ltd. - 2211-2855 .- 2211-3282. ; 122
Relaterad länk:
https://doi.org/10.1...
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https://ltu.diva-por... (primary) (Raw object)
https://urn.kb.se/re...
https://doi.org/10.1...
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  • Tidskriftsartikel (refereegranskat)
Abstract Ämnesord
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  • Carbon quantum dots (C-dots) showed excellent structure-tunable optical properties, mainly composed of carbon, nitrogen and oxygen. They have been used for various types of solid-state optical devices. Due to the photoluminescence quenching caused by aggregation, it is a challenge to produce high quantum yield and large Stokes shift C-dots via controllable and simple approaches. In this work, we demonstrated a microwave assisted heating approach for the high-quality C-dots production with ten grams scale per batch in less than 4 min. The addition of metal cation promoted the formation of the foam-structure by forming carboxyl-metal-amine complex, enabling the spatial confined growth of the C-dots in a solid-state, contributing to the high quantum yield (QY) of 73% with a Stokes shift of 0.65 eV. By tuning the structure of the C-dots, excitation dependent and independent photoluminescent (PL) behavior were achieved because of the formation of the different types of energy states evidenced by transient PL and femtosecond transient absorption spectroscopy. These optical properties enable the C-dots to be successfully integrated in luminescent solar concentrators (LSCs), having an external optical efficiency of 3.0% and a power conversion efficiency of 1.3% (225 cm2) and an excitation-dependent high-level anticounterfeiting fluorescent code, showing a great potential for solid-state optical system.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Annan materialteknik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Other Materials Engineering (hsv//eng)

Nyckelord

Anti-counterfeiting
Carbon quantum dots
Foam structure
Luminescent solar concentrators
Microwave reaction
Experimentell fysik
Experimental Physics

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