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Bright and tunable emissive monodisperse cspbi3@cs4pbi6 nanocomposites via a precise and controllable dissolution−recrystallization method

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Nano Research 2023年第1期16卷 1586-1594页

作者： Luyu Cao Bomei Liu Lin Huang Zhi Zhou Chong-Geng Ma Jian Zhang Jing Wang Ministry of Education Key Laboratory of Bioinorganic and Synthetic Chemistry State Key Laboratory of Optoelectronic Materials and TechnologiesSchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275China School of Materials Science and Engineering Sun Yat-Sen UniversityGuangzhou 510275China College of Science Hunan Optical Agriculture Engineering Technology Research CenterHunan Agricultural UniversityChangsha 410128China CQUPT-BUL Innovation Institute Chongqing University of Posts and TelecommunicationsChongqing 400065China Engineering Research Center of Electronic Information Materials and Devices(Ministry of Education) Guangxi Key Laboratory of Information MaterialsGuangxi Collaborative Innovation Center of Structure and Property for New Energy and MaterialsSchool of Materials Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004China

Nowadays,due to uncontrolled synthesis and lack of more direct and systematic evidences,the photoluminescence origin of“zero-dimensional”cs4pbi6 remains great controversy and the luminescence cannot be *** we propose a controllable dissolution-recrystallization method to synthesize“emissive”and“non-emissive”cs4pbi6 nanocrystals(Ncs)*** comparing“emissive”and“non-emissive”cs4pbi6 Ncs,it is clearly proved that the visible emission in“emissive”cs4pbi6 Ncs comes from embedded cspbi3 quantum dots(QDs).It is found for cspbi3@cs4pbi6 nanocomposites,methyl acetate(MeAC)and cyclohexane play an important role in dissolution and recrystallization respectively to obtain cs4pbi6 matrix and cspbi3 *** from this two-step method,the as-synthesized cspbi3@cs4pbi6 nanocomposites with cspbi3 QDs uniformly distributed in cs4pbi6 matrix are bright with photoluminescence quantum yield(PLQY)up to 71.4%and exhibit improved stability than cspbi3 ***,utilizing its formation mechanism,the size of embedded cspbi3 QDs can be controlled by reasonable designing the“dissolution”process,so that the luminescence of this cspbi3@cs4pbi6 nanocomposites can be adjusted in a wide range from green to red(554–630 nm).Our finding not only provides a novel method for synthesizing tunable“emissive”cs4pbi6 Ncs,but also makes clear the photoluminescence origin of“emissive”cs4pbi6.

关键词： cspbi3@cs4pbi6 dissolution-recrystallization nanocomposites tunable emission

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