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ZnO nanoparticles as a luminescent down-shifting layer for photosensitive devices

Journal of Semiconductors 2013年第5期34卷 29-34页

作者：朱瑶 A.Apostoluk 刘诗斌 S.Daniele B.Masenelli School of Electronics and Information Northwestern Polytechnical University Universite de Lyon F-69000 LyonFrance and INLCNRSUMR 5270INSA LyonF-69621 VilleurbanneFrance Universite de Lyon F-69000 LyonFrance and IRCE LyonCNRSUMR 5256F-69626 VilleurbanneFrance

The optical properties ofZnO nanoparticles （NPs） fabricated by three different methods were studied by the UV-excited continuous wave photoluminescence in order to estimate their down-shifting （DS） efficiency. Such a luminescent layer modifies the incident solar radiation via emitting wavelengths better matching the spectral response of the underlying photosensitive device （photodiode）, thereby increasing its efficiency. Some of the studied ZnO NPs were subsequently deposited on the front side of commercial silicon photodiodes and the external quantum efficiency （EQE） characteristics of the final devices were measured. Through comparison of the photodiode＇s EQE characteristics before and after the deposition of the ZnO NPs layer, it was concluded that for the photodiode with a low UV sensitivity （about 8%）, the ZnO luminescent layer produces a down-shifting effect and the EQE in the UV and blue range improves by 16.6%, while for the photodiodes with a higher initial UV sensitivity （about 50%）, the EQE in this range decreases with the ZnO layer thickness, due to the effects competing with DS, like the diminution of the ZnO layer transmittance and an increasing diffusion.

关键词： ZnO nanoparticles photoluminescence down-shifting external quantum efficiency

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Monolithic crystalline silicon solar cells with SiN_x layers doped with Tb^(3+) and Yb^(3+) rare-earth ions

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Journal of Rare Earths 2019年第5期37卷 515-519页

作者： Ing-Song Yu Shao-Chun Wu Lucile Dumont Julien Cardin Christophe Labbé Fabrice Gourbilleau Department of Materials Science and Engineering National Dong Hwa University CIMAP CNRS/CEA/ENSICAEN/Université de Caen Normandie

In this study, we propose the fabrication of monolithic crystalline silicon solar cells with Tb^(3+) and Yb^(3+)-doped silicon nitride(SiN_x) layers by low-cost screen-printing methods. The performances of c-Si solar cells can be enhanced by rare-earth ions doped SiN_x layers via the mechanism of spectrum *** SiN_x doped and codoped thin films were deposited by reactive magnetron co-sputtering and integrated as the antireflection coating layers in c-Si solar cells. The characterizations of SiN_x, SiN_x:Tb^(3+) tand SiN_x:Tb^(3+)-Yb^(3+) thin films were conducted by means of photoluminescence, Rutherford backscattering spectroscopy, Ellipsometry spectroscopy and Fourier transform infrared measurements. Their composition and refractive index was optimized to obtain good anti-reflection coating layer for c-Si solar *** electron microscopy performs the uniform coatings on the textured emitter of c-Si solar cells. After the metallization process, we demonstrate monolithic c-Si solar cells with spectrum conversion layers, which lead to a relative increase by 1.34% in the conversion efficiency.

关键词： Crystalline silicon solar cell Spectrum conversion Silicon nitride down-shifting Rare-earth ion Anti-reflection coating

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down-conversion materials for organic solar cells:Progress,challenges,and perspectives

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Aggregate 2022年第3期3卷 59-79页

作者： Ram Datt Swati Bishnoi Harrison Ka Hin Lee Sandeep Arya Sonal Gupta Vinay Gupta Wing Chung Tsoi Faculty of Science and Engineering Sustainable Product Engineering Centre for Innovative Functional Industrial CoatingsSwansea UniversityBay CampusFabian WaySwansea SA18ENUK Advanced Materials and Metrology Division Council of Scientific And Industrial Research-National Physical LaboratoryDr.K.S.Krishnan MargNew Delhi 110012India Department of Physics University of JammuJammuJammu and Kashmir 180006India Department of Conducting Polymers Institute of Macromolecular ChemistryCzech Academy of SciencesPrague 616206Czech Republic Department of Physics Khalifa University of Science and TechnologyP.O.Box 127788Abu DhabiUnited Arab Emirates

Organic solar cells(OSCs)in terms of power conversion efficiency(PCE)and operational lifetime have made remarkable progress during the last decade by improving the active layer materials and introducing new *** newly developed wide bandgap organic donor and low bandgap acceptor molecules covered the absorption from the visible to the near-infrared *** the incident high energy region(UV)is not in favor of *** absorption causes thermalization losses and photoinduced degradation,which hinders the PCE and lifetime of ***,lanthanide and non-lanthanide-based down-conversion(DC)materials have been introduced,which can effectively convert the high-energy photons(UV)to low-energy photons(visible)and resolve the spectral mismatch losses that limit the absorption of OSCs in high energy incident ***,the DC materials also protect the OSCs from UV-induced *** DC materials were also proposed to cross the Shockley-Queisser efficiency limit of the solar *** this review,the need for DC materials and their processing method for OSCs have been thoroughly ***,the main emphasis has been given to developing lanthanides and non-lanthanides-based DC materials for OSCs,their applications,and their impact on photovoltaic device performance,stability,and future perspectives.

关键词： down-conversion down-shifting lanthanides organic solar cells photostability

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