HW8 - EE 119 Homework 8 Professor: Jeff Bokor TA: Xi Luo...

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Homework 8 Professor: Jeff Bokor TA: Xi Luo Due Tuesday , April 13 th 2010 (Please submit your answers in EE119 homework box located in 240 Cory Hall) 1. Solar Cell Tired of paying outrageous energy bills and afraid of future rolling blackouts, Uncle Mac is determined to become energy self-sufficient. He wants to power his house with solar panels and comes to you for help. You know that a solar cell can be modeled simply as photodiode where the built-in potential of the p-n junction provides the output voltage and the intensity of the sun converted into electrons provides the output current (see figure 1). He finds in a catalog 10cm x 10cm solar cells made of doped crystalline silicon (Bandgap = 1.1eV, estimated output voltage = 0.5V, quantum efficiency = 15%, loss due to heat generated by photons with energy greater than the bandgap = 40%, cost per panel including all
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HW8 - EE 119 Homework 8 Professor: Jeff Bokor TA: Xi Luo...

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