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Aggregation-Induced Enhanced Red Emission Graphene Quantum Dots for Integrated Fabrication of Luminescent Solar Concentrators
Nano Letters ( IF 9.6 ) Pub Date : 2024-09-09 , DOI: 10.1021/acs.nanolett.4c03412
Jiurong Li 1 , Haiguang Zhao 2 , Xiujian Zhao 1 , Xiao Gong 1
Nano Letters ( IF 9.6 ) Pub Date : 2024-09-09 , DOI: 10.1021/acs.nanolett.4c03412
Jiurong Li 1 , Haiguang Zhao 2 , Xiujian Zhao 1 , Xiao Gong 1
Affiliation
Graphene quantum dots (GQDs) commonly suffer from the fluorescence problem of aggregation-caused quenching under high-concentration loading or in the solid state, which seriously hinders the application. Here we report a type of GQDs with red aggregation-induced enhanced emission (AIEE). It is confirmed that the aggregation state of the AIEE GQDs is a J-aggregate. The GQDs/poly(methyl methacrylate) film presented a photoluminescence quantum yield as high as 60.81%, and the record-high performance of luminescent solar concentrators (LSCs) was achieved. The power conversion efficiency (ηPCE) is up to 8.35% and the external optical efficiency (ηext) is ∼8.99% for the GQD-based LSCs (45 mW/cm2). Even under one sun illumination (100 mW/cm2), the corresponding ηPCE and ηext values are 3.12% and 4.52%, respectively. The internal photon efficiency (ηint) of an LSC device is about 5.02%. The synthesis of AIEE GQDs bridges the research gap in the emission mechanism of AIEE in GQDs.
中文翻译:
用于集成制造发光太阳能聚光器的聚集诱导增强红光发射石墨烯量子点
石墨烯量子点(GQD)在高浓度负载或固态下普遍存在聚集引起的荧光猝灭问题,严重阻碍了其应用。在这里,我们报道了一种具有红色聚集诱导增强发射(AIEE)的 GQD。证实AIEE GQDs的聚集状态是J-聚集。 GQDs/聚甲基丙烯酸甲酯薄膜的光致发光量子产率高达60.81%,实现了发光太阳能聚光器(LSC)的创纪录的性能。基于GQD的LSC(45 mW/cm 2 )的功率转换效率(η PCE )高达8.35%,外部光学效率(η ext )约为8.99%。即使在一太阳光照(100 mW/cm 2 )下,相应的η PCE和η ext值也分别为3.12%和4.52%。 LSC器件的内部光子效率(η int )约为5.02%。 AIEE GQD 的合成弥补了 GQD 中 AIEE 发射机制的研究空白。
更新日期:2024-09-09
中文翻译:
用于集成制造发光太阳能聚光器的聚集诱导增强红光发射石墨烯量子点
石墨烯量子点(GQD)在高浓度负载或固态下普遍存在聚集引起的荧光猝灭问题,严重阻碍了其应用。在这里,我们报道了一种具有红色聚集诱导增强发射(AIEE)的 GQD。证实AIEE GQDs的聚集状态是J-聚集。 GQDs/聚甲基丙烯酸甲酯薄膜的光致发光量子产率高达60.81%,实现了发光太阳能聚光器(LSC)的创纪录的性能。基于GQD的LSC(45 mW/cm 2 )的功率转换效率(η PCE )高达8.35%,外部光学效率(η ext )约为8.99%。即使在一太阳光照(100 mW/cm 2 )下,相应的η PCE和η ext值也分别为3.12%和4.52%。 LSC器件的内部光子效率(η int )约为5.02%。 AIEE GQD 的合成弥补了 GQD 中 AIEE 发射机制的研究空白。