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1二维量子片及其光学研究进展显示文摘以石墨烯为代表的二维材料因其独特的结构和优异性能而受到广泛关注。随着二维材料在无限小的方向不断发展,二维(材料)量子片逐渐引起人们极大的兴趣。二维量子片不仅保留了二维材料的本征特性,而且表现出量子限域和突出的边缘效应,为二维材料的潜在应用带来全新机遇。本文详细介绍了二维量子片的基本概念,制备现状与光学性能的研究进展,特别强调了二维量子片本征、普适和规模制备的实现及其重大意义。此外,重点关注了二维量子片的光致发光特性以及在非线性光学、固态发光器件等领域的应用。最后,分析了二维量子片的发展趋势以及面临的主要挑战。陈哲学 王卫彪 梁程 张勇 2021中国光学2021,14,1:4
2Control of vertical phase separation in high performance non-fullerene organic solar cell by introducing oscillating stratification preprocessing显示文摘Non-fullerene organic solar cell(NFOSC)has attracted tremendous attention due to their great potential for commercial applications.To improve its power conversion efficiency(PCE),generally,sequential solution deposition(SSD)methods have been employed to construct the graded vertical phase separation(VPS)of the bulk-heterojunction(BHJ)active layer for efficient exciton separation and charge transition.However,a variety of orthogonal solvents used in the SSD may lead to the unpredicted change in the BHJ morphology and introduce additional defects inside the BHJ bulk thus complicate the fabrication process.Here,a simple oscillating stratification preprocessing(OSP)is developed to facilitate the formation of graded VPS among the BHJ layer.As a result,a significant improvement is obtained in PCE from 10.96%to 12.03%,which is the highest value reported among PBDB-T:ITIC based NFOSC.Dayong Zhang Pu Fan Jinyu Shi Yifan Zheng Jian Zhong Junsheng Yu 2021Nano Research2021,14,5:0
3Controllable Photoelectric Properties of Carbon Dots and Their Application in Organic Solar Cells显示文摘Organic solar cells are a current research hotspot in the energy field because of their advantages of lightness,translucency,roll to roll printing and building integration.With the rapid development of small molecule acceptor materials with high-performance,the efficiency of organic solar cells has been greatly improved.Further improving the device efficiency and stability and reducing the cost of active layer materials will contribute to the industrial development of organic solar cells.As a novel type of carbon nanomaterials,carbon dots gradually show great application potential in the field of organic solar cells due to their advantages of low preparation cost,non-toxicity and excellent photoelectric performance.Firstly,the synthesis and classification of carbon dots are briefly introduced.Secondly,the photoelectric properties of carbon dots and their adjusting,including adjustable surface energy level structure,good film-forming performance and up/down conversion characteristics are summarized.Thirdly,based on these intrinsic properties,the feasibility and advantages of carbon dots used in organic solar cells are discussed.Fourthly,the application progress of carbon dots in the active layer,hole transport layer,electron transport layer,interface modification layer and down-conversion materials of organic solar cells is also reviewed.Finally,the application progress of carbon dots in organic solar cells is prospected.Several further research directions,including in-depth exploration of the controllable preparation of carbon dots and their application in the fields of interface layer and up/down conversion for improving efficiency and stability of device are pointed out.Wen-Sheng Zhao Xin-Xin Li Han Zha Yong-Zhen Yang Ling-Peng Yan Qun Luo Xu-Guang Liu Hua Wang Chang-Qi Ma Bing-She Xu 2022Chinese Journal of Polymer Science2022,40,1:0
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