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User:Ylflyfish

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Hi.I am Lu Yu. With three-year master's study in the field of solar cells and one-year work experience as the electronic engineer in the province electric power design institute,I am pretty sure about my future research interest in photovoltaic technology. I am willing to spend years learning advanced knowledge and conducting cutting-edge research in this field. I hope to make my impact in the field of the photovoltaic technology. MTU is on the top of my list as the work done at MOST best fits my current research interests and past project experiences. I sincerely hope that I could have an opportunity to join you.
Email: ylflyfish@hotmail.com
Phone: (+86) 152-1064-7002
Adress: Xincheng Garden, Caihong Rd, Weicheng, Weifang, Shandong, 261000, China

Academic Background[edit]

I received Master of Engineering in Power Engineering in 2016 from North China Electric Power University in Beijing, China. During the graduate study, my research focused on Optoelectronic Devices, Semiconductors, Organic Photovoltaic and Interfacial layers. I did my master graduation thesis under the supervision of Professor Jun Lin and Professor Zhan'ao Tan, and the thesis topic is study on Surface Morphology Optimization and Electrode Interfacial Layer Modification in Polymer Solar Cells. I completed Bachelor of Engineering in Thermal Energy and Power Engineering from North China Electric Power University in Beijing, China in 2013. My undergraduate study was mainly about design of fossil fired power plant. My senior thesis is the assessment of environmental protection measures of thermal power enterprises and its effect on the environment.

Research Experience[edit]

Beijing Key Laboratory of Novel Thin Film Solar Cells, North China Electric Power University
Research Assistant, Advisor: Prof. Zhan’ao Tan    < Mar 2013 - May 2016 > 

Explored the Mechanism of Cathode Buffer Layer by Comparing Detail Effects on the Device Photovoltaic Performance Caused by Two Different Interfacial Materials[edit]

Independent Researcher < July 2015–Present >

Two kinds of materials were applied as the cathode buffer layer. Both have similarity in chemical structure, but only one contains Fluorocarbon bond. Experiments under different conditions have been conducted to make the optimization of the device photovoltaic performance as well as the comparison of the effects caused by these two different materials. UPS and surface potentials have been performed to investigate the energy levels, TEM and AFM have been applied to clarify the surface morphology. XPS was conducted to confirm that the main chemical structure of the film. This work is still in process, and some other detail work still needs to be done in order to make the further exploration of the detail work mechanism of the cathode buffer layer.

High-Efficiency Polymer Solar Cells with Modification of Alcohol-soluble Metal Complexes[edit]

Independent Researcher < Mar 2014 - Sept 2015 >

Solution–processed hafnium (IV) acetylacetonate (Hf(acac)4) was utilized as an effective cathode buffer layer (CBL) in PSCs to optimize the energy level alignment between the photoactive layer and the cathode contact, with the short-circuit current density (JSC), open-circuit voltage (VOC) and fill factor (FF) all simultaneously improved, leading to enhanced power conversion efficiencies (PCEs). Ultraviolet photoemission spectroscopy (UPS) and scanning Kelvin probe microscopy (SKPM) were performed to confirm that the interfacial dipoles were formed with the same orientation direction as the build-in potential between the photoactive layer and Hf(acac)4 CBL, benefiting the exciton separation and electron transport/extraction. In addition, the optical characteristics and surface morphology of the Hf(acac)4 CBL were also investigated.

Performance Improvement of Conventional and Inverted Polymer Solar Cells with Hydrophobic Fluoropolymer As Nonvolatile Processing Additive[edit]

Independent Researcher < Mar 2013 - Feb 2015 >

To control the morphology, hydrophobic fluoropolymer polyvinylidene fluoride (PVDF) as nonvolatile additive was introduced into the P3HT: PCBM active layer. The effect of PVDF on the surface and the bulk morphology were investigated by atomic force microscope and transmission electron microscopy, respectively. Through the repulsive interactions between the hydrophilic PCBM and the hydrophobic PVDF, much more uniform phase separation with good P3HT crystallinity is formed within the active layer, resulting enhanced light harvesting and improved photovoltaic performance in conventional devices. The PCE of the conventional device with the ITO/PEDOT:PSS/P3HT:PCBM/Al structure can improve from 2.40% to 3.07% with PVDF additive. The PVDF distribution within the active layer was investigated by secondary ion mass spectroscopy, confirming a bottom distribution of PVDF. Therefore, inverted device structure was designed, and the PCE can improve from 2.81% to 3.45% with PVDF additive. This research suggests that PVDF is a promising nonvolatile processing additive for high performance polymer solar cells.

Design of Efficient Perovskite/Fullerene Planar Heterojunction Solar Cells[edit]

Collaborative Researcher < Feb 2014–Oct 2014 >

  • Prepared the perovskite layer to achieve the optimization of surface roughness, coverage rate and crystalline state
  • Optimized the performance of devices through applying different interfacial modification layer to minimize the interfacial traps and the interfacial barriers caused by the incompatibility between the photoactive layer and the electrodes
  • Optimized the device structure of perovskite solar cells through adopting vapor deposition methods to prepare perovskite

Fabrication and Optimization the Light-emitting Diode (LED) Based on Quantum Dots and Perovskite[edit]

Collaborative Researcher < Dec 2014–July 2015 >

  • Optimized the thickness and surface roughness of each layer to improve the performance of LED based on Perovskite system
  • Fabricated the Quantum Dot LED (QD-LED) by adopting inorganic semiconductor nanomaterials with different sizes and applied POLY-TPD and PEFOT: PSS as the hole transport and injection layer, Alq3, ZnO, and TiOx as the electron transport layer to fabricate QD-LED devices with tunable emission color from blue to red
National Undergraduate Students’Innovative Experiment Project, North China Electric Power University
Research Assistant, Advisor: Prof. Hui Zhang	< Sept 2011 - Sept 2012 >
  • Designed two kinds of pedal power generation devices
  • Realized the solid modeling and simulation of two models with SolidWorks software
  • Designed the matched electric energy conversion circuit and detection control circuit based on model design parameters
  • Made the pedal hydraulic power generation model and pedal mechanical power generation model and purchased electronic components to make circuit boards

Work Experience[edit]

Shandong Electronic Power Engineering Consulting Institute Co., Ltd. < July 2016 – Present >

Electronics Engineer, Renewable Energy Department

  • Involved in designing and engineering consulting for photovoltaic-thermal system and biomass power projects
  • Communicated with customers and device factories to provide technical support

Publication[edit]

Patent[edit]

  • Z. Tan, L. Yu, C. Li, X. Hou, J. Lin, A kind of self-assembled cathode modified material for polymer solar cells and its modification method: CN, 201410184500.5[P]. 2014-09-03
  • Z. Tan, C. Li, L. Yu, J. Qu, A kind of alcohol-soluble cathode modified material for polymer solar cells and its modification method: CN, 201410268841.0[P]. 2014-09-03
  • Z. Tan, C. Li, L. Yu, J. Qu, The solution-processed planar heterojunction perovskite solar cell and its preparation method: CN, 201410268785.0[P]. 2014-09-03
  • Z. Tan, C. Li, X. Hou, L. Yu, J. Qu, A perovskite membrane and its preparation and application method: CN, 201410268812.4[P]. 2014-09-03
  • J. Lin, Z. Shi, L. Yu, X. Hou, A kind of proton exchange membrane with semi-interpenetrating network and its preparation method: CN, 201310749996.1[P]. 2014-04-16
  • Y. Xiang, T. Deng, S. Lei, W. Song, L. Yu, M. Zhao, H. Zhang, The pedal energy storage power generation device (mechanical power): CN, 201220042170.2[P]. 2012-10-10

Conference Presentation[edit]

Chinese Materials Conference 2015, Guiyang, China < July 2015 >

Speaker, “Performance Improvement of Conventional and Inverted Polymer Solar Cells with Hydrophobic Fluoropolymer as Nonvolatile Processing Addictive”

Technical Skills[edit]

Devices:Atomic Force Microscope (AFM), Scanning Kelvin Probe Microscopy (SKPM), Scanning Electron Microscopy (SEM), Infrared Spectra Testing,X-Ray Photoelectron Spectroscopy (XPS), X-ray Diffraction (XRD), Magnetron Sputtering, Glovebox, Spin Coater, Photovoltaic Testing System, Electrochemical Workstation

Computer Skills:Matlab, Origin, AutoCAD, Chemdraw, Endnote, Photoshop