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Manipulating the morphology of CdS/Sb_(2)S_(3) heterojunction using a Mg-doped tin oxide buffer layer for highly efficient solar cells

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Journal of Energy Chemistry 2022年第3期31卷 374-381,I0010页

作者： Jiashuai Li Liangbin Xiong Xuzhi Hu Jiwei Liang Cong Chen Feihong Ye Jing Li Yongjie Liu Wenlong Shao ti wanga Chen Tao Guojia Fang Key Lab of Artificial Micro-and Nano-Structures of Ministry of Education of China School of Physics and TechnologyWuhan UniversityWuhan 430072HubeiChina School of Optoelectronic Engineering Guangdong Polytechnic Normal UniversityGuangzhou 510665GuangdongChina Shenzhen Institute Wuhan UniversityShenzhen 518055GuangdongChina

Antimony sulfide(Sb_(2)S_(3))is an appealing semiconductor as light absorber for solar cells due to its high absorption coefficient,appropriate band gap(~1.7 e V)and abundance of constituent ***,power conversion efficiency(PCE)of Sb_(2)S_(3)-based solar cells still lags much behind the theoretically predicted due to the imperfect energy level alignment at the charge transporting layer/Sb_(2)S_(3)interfaces and hence severe charge ***,we insert a high-temperature sintered magnesium(Mg)-doped tin oxide(SnO_(2))layer between cadmium sulfide(Cd S)and fuorine doped tin oxide to form a cascaded energy level alignment and thus mitigate interfacial charge ***,the inserted Mg-doped Sn O_(2)buffer layer facilitates the growth of the neibouring Cd S film with orientation followed by Sb_(2)S_(3)film with larger grains and fewer ***,the resultant Sb_(2)S_(3)solar cells with Mg-doped SnO_(2)deliver a champion PCE of 6.31%,22.8%higher than those without a buffer *** work demonstrates that deliberate absorber growth as well as efficient hole blocking upon an appropriate buffer layer is viable in obtaining solution-processed Sb_(2)S_(3)solar cells with high performance.

关键词： Morphology Sb_(2)S_(3)solar cells Mg-doped tin oxide Orientation

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Engineering the electronic structure on MXenes via multidimensional component interlayer insertion for enhanced electromagnetic shielding

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Journal of Materials Science & Technology 2023年第7期138卷 149-156页

作者： Mengqiu Huang Lei Wang Biao Zhao Guanyu Chen Renchao Che Laboratory of Advanced Materials Shanghai Key Lab of Molecular Catalysis and Innovative MaterialsDepartment of Materials ScienceFudan UniversityShanghai 200438China Joint-Research Center for Computational Materials Zhejiang LaboratoryHangzhou 311100China

MXene-based functional electromagnetic interference(EMI)shielding films are highly desirable for mod-ern integrated electronic and telecommunication systems in aerospace,military,artificial intelligence,and smart and wearable electronics *** this work,3D freestanding ti_(3)C_(2)T_(x)/CNTs/Ni film assembled by 1D multi-walled carbon nanotubes(MWCNTs)/Ni and 2D ti_(3)C_(2)T_(x)MXene sheets was synthesized by a facile vacuum filtration *** electrostatic incorporation,hexagonal nickel plates embed on the CNTs and then the CNTs/Ni insert into the ti_(3)C_(2)T_(x)layers to form magnetized ti_(3)C_(2)T_(x)-based functional film with a compact and laminated *** to the outstanding electron migration capacity in the highly conductive ti_(3)C_(2)T_(x)sheet and multiple internal reflections from porous and segregated structures,the op-timized ti_(3)C_(2)T_(x)/CNTs/Ni composite films show excellent EMI shielding effectiveness of 67.4 dB with elec-trical conductivity of 744 S cm^(-1).Surprisingly,a magnetization compensation strategy is built to boost the EMI shielding effectiveness with decreased ***,the visual magnetic coupling phenomenon and charge distribution in the heterogeneous interfaces could be observed in the recon-structed electron holography *** encouraging results shed light on novel magnetized MXene-based functional films for high-performance EMI shielding.

关键词： ti_(3)C_(2)T_(x)MXene Magnetic modulation Electromagnetic-interference shielding Nickel flakes Freestanding film

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