检索结果-南通市图书馆

Interface Engineering and Morphology Control for High Performance Perovskite/Organic Hybrid planar heterojunction Solar Cells

在线全文

cnki会议

学校读者我要写书评

暂无评论

Interface Engineering and Morphology Control for High Perfor...

第二届新型太阳能电池学术研讨会

作者： Hin-Lap Yip Qifan Xue Chen Sun Zhicheng Hu Fei Huang Yong Cao State Key Laboratory of Luminescent Materials and Device South China University of Technology

In this talk I will present two strategies to improve the performance of perovskite/organic planar heterojunction solar cells. First, the growth kinetic of the perovskite films was tuned by introducing chemically-tailored processing additives. Depending on the choice of the additives, the crystallinity and coverage of the perovskite films can either be enhanced or suppressed and we found that the solar cell performance was strongly depending on the morphology of the perovskite films.1,2 Second, novel interfacial materials were introduced to improve the contact between the fullerene electron transport layer and the metal cathode interface, resulted in Ohmic contact with reduced interfacial resistance and a significant improvement on the fill factor. 3 We will also discuss new strategy to design novel electron transporting conjugated polymers as efficient electron selective interlayer and also the design of new hole transporting polymers as efficient hole selective interlayer for fullerene-free hybrid pervoskite solar cells. Combining these two strategies high performance perovskite solar cells with PCE over 17% were achieved.

关键词： planar heterojunction perovskite solar cells interface engineering morphology control

Photovoltage Approaching 0.9 V for planar heterojunction Silver Bismuth Iodide Solar Cells with Li-TFSI Additive

在线全文

cnki会议

学校读者我要写书评

暂无评论

Photovoltage Approaching 0.9 V for Planar Heterojunction Sil...

第六届新型太阳能电池材料科学与技术学术研讨会

作者： Qiaohui Zhang Wenjin Yu 肖立新 State Key Laboratory for Mesoscopic Physics and Department of Physics Peking University

Silver bismuth iodide(Ag-Bi-I) as environment-friendly semiconductor with suitable bandgap and high stability was regarded as potential photovoltaic material, while the reported mesoscopic devices all showed poor open circuit voltage(V) around 0.5-0.6 V. In this study, we successfully fabricated AgBiI planar heterojunction solar cells via a solution method with a Voc approaching 0.9 V, in which 2 wt.% of lithium bis(trifluoromethylsulfonyl)-imide(Li-TFSI) was added into the AgI:BiI precursor. The device presents a power conversion efficiency of 2.50 ± 0.20 % with V of 0.82 ± 0.20 V. Experimental results indicated the readily coordinated component in the organic salt, TFSI-, could assist film growth and result in a fully coverage morphology. Furthermore, double layer devices showed the carrier separation occurred in the interface of SnO/AgBiI. These results indicated interface extraction and film enhancement should be concerned in further improvements.

关键词： Silver bismuth iodide planar heterojunction lead-free additive

Plasmonic Enhancement for High-Efficiency planar heterojunction Perovskite Solar Cells

在线全文

cnki会议

学校读者我要写书评

暂无评论

Plasmonic Enhancement for High-Efficiency Planar Heterojunct...

第六届新型太阳能电池材料科学与技术学术研讨会

作者： Wenqiu Deng Zhengtian Yuan Jinhua Li Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Key Laboratory for the Green Preparation and Application of Functional MaterialsMinistry of EducationHubei Key Laboratory of Polymer MaterialsSchool of Materials Science and EngineeringHubei University

Plasmonic effect of the noble metal nanomaterials can be applied in perovskite solar cells for improving the device performances. In this study, Au@Ag@SiO core-shell nanocuboids are successfully embedded into the perovskite film of the planar heterojunction perovskite solar cells. The introduction of Au@Ag@SiO nanoparticles dramatically increase the short-circuit photocurrent density. The current density of the champion device increases to 23.76 mA cm compared to 20.87 mA cm of control device, indicating 13.85% improvement. The improved performances of devices are attributed to the enhancement of induced light absorption and carrier separation ability due to Au@Ag@SiO nanoparticles addition in perovskite film. It is promising that the plasmonic metal nanoparticles embed in perovskite materials for improving the performances of perovskite solar cells.

关键词： light absorption enhancement plasmonic nanoparticle planar heterojunction perovskite solar cells

Subtle Alignment of Organic Semiconductors at the Donor/Acceptor heterojunction Facilitates the Photoelectric Conversion Process

在线全文

cnki会议

学校读者我要写书评

暂无评论

Chinese Journal of Polymer Science 2022年第8期40卷 951-959,I0010页

作者： Yu-Xuan Liu Liang Wang Ke Zhou Hong-Bo Wu Xiao-Bo Zhou Zai-Fei Ma Sheng-Wei Guo Wei Ma State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an710049China School of Materials Science&Engineering North Minzu UniversityYinchuan750021China Center for Advanced Low-dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai201620China

The aligned molecular packing structure is vital to the anisotropic charge transport in conjugated polymer and small molecule thin ***,how this molecular packing motif influences the photoelectric conversion process at the donor/acceptor heterojunction is still ***,we employed a PM6/Y6 bilayer model to investigate the long-range alignment of molecular packing induced photoelectric conversion *** PM6 and Y6 layers were properly controlled to exhibit the uniaxially oriented molecular packing compared to their as-cast counterparts,as revealed by the polarized absorption spectra and transmission electron *** analyzing the photovoltaic performance of bilayer devices,the smaller energy loss,lower energetic disorder,and longer charge carrier lifetime can be observed in the bilayer devices with aligned Y6 molecules,which contribute to a higher power conversion efficiency(PCE)than the as-cast *** the molecular packing structure of PM6 layer exhibited negligible influence on the device performance,probably resulting from the intrinsic semicrystalline nature of PM6 *** results indicate that the alignment of small molecular acceptor at the donor/acceptor interfaces should be a powerful strategy to facilitate the photoelectric conversion process,which will definitely pave the way to highly efficient bulk heterojunction photovoltaic device.

关键词： Molecular packing Photoelectric conversion process planar heterojunction Organic solar cells

Over 16% efficiency all-polymer solar cells by sequential deposition

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2022年第6期65卷 1157-1163页

作者： Bangbang Li Xuanyu Zhang Ziang Wu Jie Yang Bin Liu Qiaogan Liao Junwei Wang Kui Feng Rui Chen Han Young Woo Fei Ye Li Niu Xugang Guo Huiliang Sun Department of Materials Science and Engineering Southern University of Science and Technology(SUSTech)Shenzhen518055China Center for Advanced Analytical Science School of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou510006China Department of Electrical and Electronic Engineering Southern University of Science and Technology(SUSTech)Shenzhen518055China Department of Chemistry Korea UniversitySeoul136-713Republic of Korea Guangdong Provincial Key Laboratory of Functional Oxide Materials and Devices SUSTechShenzhen518055China

All-polymer solar cells(all-PSCs) have received extensive attention due to their excellent mechanical robustness and performance stability. However, the power conversion efficiency(PCE) of all-PSCs still lags behind those of organic solar cells(OSCs)based on non-fullerene small molecule acceptors. Herein, we report highly efficient all-PSCs via sequential deposition(SD) with donor and acceptor layers coated sequentially to optimize the film microstructure. Compared with the bulk heterojunction(BHJ)all-PSCs, an optimized morphology with vertical component distribution was achieved for the SD-processed all-PSCs due to the synergistic effect of swelling of polymer films and using additive. Such strategy involves using chlorobenzene as the first layer processing-solvent for polymer donor, chloroform as the second processing-solvent for polymer acceptor with trace 1-chloronaphthalene, efficiently promoting exciton dissociation and charge extraction and reducing trap-assisted ***, over 16% all-PSCs fabricated via SD method was realized for the first time, which is much higher than that(15.2%) of its BHJ counterpart and also among the highest PCEs in all-PSCs. We have further demonstrated the generality of this approach in various all-polymer systems. This work indicates that the SD method can yield excellent all-PSCs and provides a facile approach to fabricating high-performance all-PSCs.

关键词： all-polymer solar cells polymer acceptors planar heterojunction sequential deposition

Doping Electron Transporting Layer:An Effective Method to Enhance J_(SC)of All-Inorganic Perovskite Solar Cells

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2021年第4期4卷 500-501页

作者： Chao Liang Guichuan Xing Joint Key Laboratory of the Ministry of Education Institute of Applied Physics and Materials EngineeringUniversity of MacaoMacaoChina

All-inorganic metal-halide CsPbBr_(3)perovskite has emerged as an attractive photovoltaic material for its outstanding environmental ***,due to the wide bandgap,the performance of CsPbBr_(3)perovskite solar cells(PSCs)is limited,especially for the short-circuit current density(J_(SC)).In this issue of Energy&Environmental Materials,Guo et *** Nb-doped SnO_(2)as electron transporting layers(ETLs),which could greatly improve the J_(SC)of the PSCs based on all-inorganic CsPbBr_(3).

关键词： all-inorganic perovskite depletion region width doping planar heterojunction

Preparation of CH_3NH_3PbI_3 thin films for solar cells via Vapor Transfer Method

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2018年第5期27卷 1386-1389页

作者： Kejie Feng Yitong Liu Yuancheng Zhang Yujie Liu Xiaoliang Mo Department of Materials Science Fudan University Shanghai 200433 China Shanghai Solar Energy Research Center Shanghai 201100 China

Organometal halide perovskite based solar cells have emerged as one of the most promising candidates for low-cost and high-efficiency solar cell technologies. Here a Vapor Transfer Method （VTM） is used to fabricate high quality perovskite thin films in a balanced vacuum capsule. By adjusting the reaction tem- perature, CH_3NHl_3 saturated vapor which then reacts with Pbl_2 films can be controlled and the formation process of CH_3NH_3Pbl_3 perovskite films can be further influenced. Prepared perovskite films which ex- hibit pure phase, smooth surface and high crystallinity are assembled into planar heterojunction inverted solar cells. The whole fabrication process of solar cell devices is organic solution free. Finally, the cham- pion cell achieved power conversion efficiency （PCE） of 13.08% with negligible current-voltage hysteresis under fully open-air conditions. The photovoltaic performance could be further enhanced by optimizing perovskite composition and the device structure.

关键词： Vapor Transfer Method Organometal halide perovskite planar heterojunction Inverted architecture Solar cells

Hybrid Rinse Solvent Processing Superflat Perovskite Film in planar Solar Cells

在线全文

学校读者我要写书评

暂无评论

Hybrid Rinse Solvent Processing Superflat Perovskite Film in...

第五届新型太阳能电池学术研讨会

作者： Xin Ding Lv Nan Li Xitao Li Yan Zhen Zheng Xia Tao State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology

planar perovskite solar cells show a great promise for practical application, however the most commonly used simple low-temperature solution-process planar CHNHPbI perovskite film faces challenges of rough surface and torpid interfacial charge transfer. The present study aims at preparing a superflat perovskite film via spin-coating of a DMF/DMSO solution of CHNHPbI followed by dripping the designed hybrid rinse solvent(n-hexane and chlorobenzene) for planar perovskite solar cells. The hybrid rinse solvent induces to form a well-defined DMSO-PbI-MAI intermediate phase, and hence improves the flatness of perovskite film with a roughness of 7.3 nm. Microstructure,TR-PL, EIS, and IMPS characterizations show that the superflat perovskite film allows tight contact and facile interfacial charge transfer at ZnO/CHNHPbI/spiro-OMeTAD interfaces. Such a hybrid rinse solvent processing perovskite film achieves a highly reproducible photovoltaic performance of PHJ-PSCs with an average power conversion efficiency of 16.36% and a champion of 16.93%.

关键词： perovskite solar cells planar heterojunction hybrid rinse solvent superflat perovskite film interfacial charge transfer