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A New Nonfullerene Acceptor with Suppressed energy Disorder for High-Efficiency Organic Solar Cells

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CCS Chemistry 2024年第11期6卷 2749-2757页

作者： Zi Li Huifeng Yao Zhihao Chen Wenxuan Wang Yang Xiao Jianqiu Wang Junzhen Ren Tao Zhang Jiayao Li Jianhui Hou State Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular SciencesCAS Research/Education Center for Excellence in Molecular Sciences Institute of ChemistryChinese Academy of SciencesBeijing 100190 School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189 University of Chinese Academy of Sciences Beijing 100049

energy disorder is an important factor that affects charge transport,recombination,and energy loss in organic solar ***,we designed a ladder-type nonfullerene acceptor and studied the critical role of energy disorder in photovoltaic *** a typical seven-member fused ring acceptor IT-4F as an example,we replaced its sp3-hybridized bridging carbon atoms and linked bulky groups with triisopropylbenzene-substituted pyrrole *** newly synthesized acceptor 2,2′-((2Z,2′Z)-((3,9-bis(2-butyloctyl)-6,12-bis(2,4,6-triisopropylphenyl)-6,12-dihydrothieno[2″,3″:4′,5′]thieno[2′,3′:4,5]pyrrolo[2,3-f]thieno[2′,3′:4,5]thieno[3,2-b]indole-2,8-diyl)bis(methanylylidene))bis(5,6-difluoro-3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile(TBB)has a redshifted absorption spectrum with upshifted energy levels than those of *** importantly,TBB shows more suppressed energy disorder,which leads to enhanced charge mobility and improved luminescence ***,TBB-based devices obtained a power conversion efficiency of 16.2%with a relatively low nonradiative energy loss(0.22 eV),which exceeds that of IT-4F-based devices(11.5%)and is one of the top values among non-Y6 *** work demonstrates that rational molecular design is crucial for the suppression of energy disorder.

关键词： organic solar cells nonfullerene acceptors energy disorder energy loss photoactive materials

EFFECT OF ORIENTATION ON STRESS RESPONSE,FRICTION STRESS AND BACK STRESS DURING CYCLIC DEFORMATION IN Al SINGLE CRYSTALS

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Acta Metallurgica Sinica(English Letters) 1993年第1期6卷 67-72页

作者： XIA Yuebo ZHANG Tianyi State Key Laboratory for Fracture and Failure of Materials.Institute of Metal Research,Academia Sinica.Shenyang.China DENG Jun Shenyang Polytechnical University.China Associate Professor,Institute of Metal Research,Academia Sinica,Shenyang 110015,China

The symmetrical push-pull fatigue tests at strain amplitude of 2×10~3 with different slip orientation of Al single crystals,were carried out at room temperature in *** peak stresses of various cycles were measured an... 详细信息

关键词： crystal orientation cyclic deformarion stress response energy loss slip morphology

Experimental and theoretical investigations of absolute optical oscillator strengths for valence excitations of nitric oxide

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Chinese Physics B 2002年第11期11卷 1149-1156页

作者：朱林繁钟志萍等 LaboratoryofBondSelectiveChemistry DepartmentofModernPhysicsUniversityofScienceandTechnologyofChinaHefei230027China DepartmentofPhysics theGraduateSchooloftheChineseAcademyo

The absolute optical oscillator strength density spectra of nitric oxide in the energy region of 5.0-22.0 eV havebeen measured by a high-resolution fast-electron energy loss spectrometer. With the calculated results obtained by themultiscattering self-consistent-field method and channel characteristics, the strongly overlapped spectra in the energyregion of 7.5-9.3 eV have been analysed and the corresponding partially vibrationally resolved optical oscillator strengthshave been estimated from the experimental spectra.

关键词： oscillator strength energy loss vacuum ultraviolet spectrum

Superexcited states of carbon monoxide studied by fast-electron impact

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Chinese Physics B 2005年第12期14卷 2478-2483页

作者：范岚岚钟志萍朱林繁刘小井成华东苑震生徐克尊 Hefei National Laboratory for Physical Sciences at Microscale Department of Modern Physics University of Science and Technology of China Hefei 230026 China College of Physical Science Graduate School of the Chinese Academy of Sciences Beijing 100049 China

Absolute optical oscillator strength density and double differential cross section spectra of CO below 120 eV are determined by fast electron impact. Some peaks above the first ionization threshold stand out as the momentum transfer square K2 increases. The doubly excited Rydberg states converging to C 2∑^＋, D ^2∏, and F ^2∏ states of CO^＋, respectively, are confirmed in our spectra. Another peak at around 32eV is assigned to the transition of （3σ）^-1（2π）^1^1∏←X^1∑^＋.

关键词： oscillator strength superexcited state energy loss CO

Aerodynamic Design and Analysis of a Low-reaction Axial Compressor Stage

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Chinese Journal of Aeronautics 2008年第1期21卷 1-7页

作者：羌晓青王松涛冯国泰王仲奇哈尔滨工业大学能源科学与工程学院

There is introduced a new low-reaction, highly-loaded axial compressor design concept which is coupled with boundary layer suction method. The characteristic features of the concept are made clear through its comparison with the MIT boundary layer suction compressor. Also are pointed out the potential applications of this concept as well as its key technological problems. Based on this concept, a single-stage, low-reaction and low-speed axial compressor is constructed in association with analysis and computation of boundary layer suction on vanes with the aid of a three-dimensional numerical approach. The results attest to the effectiveness of this way to control separation in blade cascades by the boundary layer suction and the feasibility of this proposed design concept.

关键词： aerospace propulsion system low-reaction axial compressor boundary layer suction energy loss

Impact of the Intermittency of Photovoltaic Power Plants on the Frequency Management: Case of the Senegalese Electricity Grid

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Journal of Power and energy Engineering 2020年第7期8卷 55-70页

作者： Mahamat Adoum Abdoulaye Gabriel Jean Philippe Tevi Djicknoum Diouf Amadou Seidou Maiga LEITER Laboratoire Electronique Informatique Télécommunication et Energies Renouvelables Université Gaston Berger Saint-Louis Sénégal

This paper investigates the impact of the intermittency of the photovoltaic (PV) power plants on the electric grid frequency management and the consequences that can occur. To meet these purposes, three years data of the Senegalese grid frequency are used, combined with three PV power plants data since their starting-up. Using these data, we analyzed two days of heavily disturbed operation of the Senegalese grid in order to emphasize the real impact of the presence of PV power plants on the electrical grid. Our study has highlighted that how the intermittency of photovoltaic power plants affects frequency management. It obviously appears that the PV production curves follow the irradiation variations. Instantaneous variations of PV production make it difficult to manage the grid frequency leading to more frequent load shedding as we have shown with the data after the commissioning of the PV power plants. We also estimate the power then energy losses during the load shedding induced by the PV integration on the power grid by comparing a period corresponding to one month before (February 2017) and one month after (February 2018) the integration of variable PV production.

关键词： Intermittency Frequency Fluctuation energy loss Power loss Fluctuating Power

Quasi-Horizontal Arrangement of Solar Panels in Equatorial Zones： Problems and Proposed Solutions

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Journal of energy and Power Engineering 2017年第8期11卷 537-540页

作者： Bello Pierre Ngoussandou Oumarou Hamandjoda Djongyang Noel The Higher Institute of the Sahel University of Maroua Maroua P.O. Box 46 Cameroon The National Advanced School of Engineering University of Yaounde Yaounde P.O. Box 8390 Cameroon

Solar panels are oriented to the North （South） when the site is in the South （North） with a tilt angle close to the latitude. In the equatorial zone, the panels are quasi-horizontally arranged. This situation caused some problems： the panel is more rapidly covered with dust or salty mud that decreases its performance and degrades the protective glass. To overcome these difficulties, we evaluated theoretically and practically the energy lost by an incorrect tilt. The results are rather encouraging. Just 1.5% of total energy is lost when we tilted the panel at 10.0°. In practice, we realized that the loss of energy is fewer than we calculated it because of the reflected solar rays.

关键词： Solar panel tilt equatorial zone auto cleaning of panel energy loss salt effect on glasses.

Damping of Oblique Ocean Waves by a Vertical Porous Structure Placed on a Multi-step Bottom

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Journal of Marine Science and Application 2014年第4期13卷 362-376页

作者： Santu Das Swaroop Nandan Bora Department of Mathematics Indian Institute of Technology Guwahati Guwahati-781039 India

Oblique ocean wave damping by a vertical porous structure placed on a multi-step bottom topography is studied with the help of linear water wave theory. Some portion of the oblique wave, incident on the porous structure, gets reflected by the multi-step bottom and the porous structure, and the rest propagates into the water medium following the porous structure. Two cases are considered： first a solid vertical wall placed at a finite distance from the porous structure in the water medium following the porous structure and then a special case of an unbounded water medium following the porous structure. In both cases, boundary value problems are set up in three different media, the first medium being water, the second medium being the porous structure consisting ofp vertical regions-one above each step and the third medium being water again. By using the matching conditions along the virtualvertical boundaries, a system of linear equations is deduced. The behavior of the reflection coefficient and the dimensionless amplitude of the transmitted progressive wave due to different relevant parameters are studied. energy loss due to the propagation of oblique water wave through the porous structure is also carried out. The effects of various parameters, such as number of evanescent modes, porosity, friction factor, structure width, number of steps and angle of incidence, on the reflection coefficient and the dimensionless amplitude of the transmitted wave are studied graphically for both cases. Number of evanescent modes merely affects the scattering phenomenon. But higher values of porosity show relatively lower reflection than that for lower porosity. Oscillation in the reflection coefficient is observed for lower values of friction factor but it disappears with an increase in the value of friction factor. Amplitude of the transmitted progressive wave is independent of the porosity of the structure. But lower value of friction factor causes higher transmission. The inves

关键词： porous structure oblique wave reflection matching condition multi-step bottom friction factor energy loss

Minimizing Relax energy Lose of Charge Transfer in Dye-sensitized Solar Cell to Promote a Record Power Conversion Efficiency of 13.6%

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Minimizing Relax Energy Lose of Charge Transfer in Dye-sensi...