## Direct Energy Conversion |

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### Contents

THE PAST PRESENT AND FUTURE | 1 |

PRINCIPLES OF ENERGY CONVERSION | 26 |

INTRODUCTION TO SEMICONDUCTORS | 49 |

Copyright | |

8 other sections not shown

### Common terms and phrases

acceptor anode assumed atom calculate Carnot carriers cathode cesium concentration conduction band consider constant crystal current density defined by Eq device diffusion dimensionless effect electric field electrical power electrical resistivity electrolyte electron volts emission emitter energy conversion energy gap energy levels entropy equation equilibrium factor Fermi level figure of merit flow fluid flux fuel cell function given by Eq gradient heat transfer holes impurities increase input ionization ions Joule heat lattice magnetic field material maximum power metal mobility n-type number of electrons obtain operating oxidizer p-n junction particles Peltier percent photon photovoltaic potential power density power output pressure problem produce quantum number radiation ratio reaction region Seebeck coefficient semiconductor shown in Fig silicon solar cell space charge surface temperature difference thermal conductivity thermal efficiency thermodynamics thermoelectric tion unit valence band velocity volts watts wavelength zero