Electrical and Computer Engineering (ECE) at the Jacobs School. George Papen
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1 Electrical and Computer Engineering (ECE) at the Jacobs School George Papen University of California San Diego Jacobs School of Engineering UCSD JACOBS SCHOOL OF ENGINEERING Photo: Kevin Walsh, OLR
2 ECE at the Jacobs School UCSD JACOBS SCHOOL OF ENGINEERING Make stuff! What is electrical engineering? Make friends! How ECE majors interact and learn from fellow students Make a difference! How working in ECE can help make a better world
3 UCSD JACOBS SCHOOL OF ENGINEERING Stuff in a Modern Communication Network Chips/ Backplanes Access Wireless Computers (Home/Bus.) Campus Wide Area/Optical Network Wide Area Metro Central Office
4 UCSD JACOBS SCHOOL OF ENGINEERING
5 Make Friends! UCSD JACOBS SCHOOL OF ENGINEERING UCSD s Dynamic Learning Environment Comprehensive depth sequences in a variety of fields Circuits, devices, control, machine intelligence, photonics, communications, networks, signal processing, computer eng. Opportunities to engage ECE faculty Undergraduate research Students conduct research as undergraduates Student hourly work Undergraduates aid in tutoring and develop new labs Strong,diverse student organizations HKN, IEEE, TIES, TESC, Cal-IT CURV lab
6 UCSD JACOBS SCHOOL OF ENGINEERING Student Organizations the glue for ECE majors Interact with other students on design projects Interact with professors through student organized meetings Outreach to K-12 students (Enspire program) Just have fun! (junkyard derby)
7 Students helping students new CURV Lab UCSD JACOBS SCHOOL OF ENGINEERING Students work on real-world projects Hands on experience with electronics and design Can mentor other students (& get paid!) Projects available online Low barrier to getting involved (not a class) Hosts monthly workshops First workshop about building a guitar pedal Students will design and keep it Imagine an open lab for undergrads to just create, design, and enjoy. Reality It's here, at CALIT2 the CURV lab.
8 Make a Difference! Real-world research in ECE ECE researchers are actively developing technologies for solar energy harvesting, and renewable energy Photovoltaic technologies Concentrator optics for photovoltaics Research part of comprehensive UCSD energy activities Campus clean energy infrastructure and testbed projects California Energy Commission activities Climate change research Solar fuels and photocatalysis Thermoelectrics Solar resource availability ETY ety@ece.ucsd.edu tel: fax:
9 Solar energy utilization research at UCSD materials and transport theory Chemistry & Biochemistry Physics photocatalysis Electrical & Computer Mechanical & Aerospace Nanoengineering materials development photovoltaic thermoelectric materials/optics for wavelength partitioning, concentrators, etc. materials characterization ETY tel: fax:
10 High-efficiency solar cell structures single pn homojunction cell multijunction tandem cell [ Maximum theoretical efficiency: ~31% (unconcentrated), ~37% (1000x concentration) Efficiency relatively insensitive to incident solar spectrum Maximum theoretical efficiency higher than single cell: 2-junction: ~50% (1000x concentration) 3-junction: ~56% (1000x) Efficiency sensitive to spectral distribution of incident sunlight ETY tel: fax:
11 High efficiency Solar cells [C.H. Henry, J. Appl. Phys. 51, 4494 (1980).] E g well E g barrier [cf. K. Barnham, G. Duggan, J. Appl. Phys. 67, 3490 (1990).] Predicted maximum power conversion efficiencies for quantum-well solar cells are ~45% to ~63% (vs. ~31% to ~37% for conventional solar cell) Quantum well solar cell challenges Multiple-quantum-well materials issues, e.g., critical thickness High quantum efficiency in long-wavelength absorption Efficient carrier extraction from quantum wells ETY ety@ece.ucsd.edu tel: fax:
12 80 years of Progress in Solar Concentrators PHOTONIC SYSTEMS INTEGRATION LABORATORY UCSD JACOBS SCHOOL OF ENGINEERING 3 types of solar-thermal concentrators featured in a 1934 issue of Popular Science Monthly Tracking imagers Fixed flat panels Parabolic troughs APS 1 MWe Solar Power Plant Modern Concentrated Photo-Voltaic optics: Improved but fundamentally similar
13 PHOTONIC SYSTEMS INTEGRATION LABORATORY UCSD JACOBS SCHOOL OF ENGINEERING New Dual-wavelength Micro-optic Solar Concentrator θ Adjacent Dichroic AR-Coating Dichroic Coating (reflect IR, transmit VIS) Interleaved PV cells Single micro-optic incorporates lens and dichroic reflector 1-piece fabrication Solid acrylic or glass component Single antireflection (AR) coating Two PV-cells are interleaved on a common circuit board Individual elements fit together to form an array Utilize adjacent mirror element
14 PHOTONIC SYSTEMS INTEGRATION LABORATORY UCSD JACOBS SCHOOL OF ENGINEERING Potential for Manufacture Diamond-Turned Master Molded 1D Array Replicate into 1-dimensional array Glass or plastic molding technologies Assemble Repeat Apply Second with Dichroic 1D for Index-matching Molded Array Desired Coating Array Size Epoxy Apply coatings All other reflections are internal Assemble into 2-dimensional arrays Index-matching epoxy
15 Tracking: Novel Planar vs. Current Fresnel PHOTONIC SYSTEMS INTEGRATION LABORATORY UCSD JACOBS SCHOOL OF ENGINEERING Current Fresnel Lens CPV Systems: Louvered Planar Concentrators: Concentrix Solar Sunflower Energy Innovations - Less bulk & footprint (shadowing) - Less materials (cost) - Less wind loading (torque)
16 Summary - Why ECE at UCSD? UCSD JACOBS SCHOOL OF ENGINEERING UC system has many excellent schools - Why UCSD? Dynamic learning and research environment Still room to grow Why ECE? Because you can: Make stuff! Make friends! Make a difference!
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