000209434 001__ 209434
000209434 005__ 20181203023925.0
000209434 022__ $$a0927-0248
000209434 0247_ $$2doi$$a10.1016/S0927-0248(02)00208-8
000209434 037__ $$aARTICLE
000209434 245__ $$aA detailed analysis of ambipolar diffusion in nanostructured metal oxide films
000209434 269__ $$a2002
000209434 260__ $$c2002
000209434 336__ $$aJournal Articles
000209434 520__ $$aA transport equation is derived which describes the behavior of the nanostructured metal oxide films in a photoelectrochem. cell.  A detailed anal. of the charge compensation mechanism necessarily leads to a transport equation with characteristics similar to but logically distinct from the pure diffusion equation.  The studied phenomenon was named ambipolar diffusion in the early 1950s.  It takes into account the fact that the diffusion processes of ions and electrons occur at different speeds.  A weak elec. field therefore couples the processes together to preserve charge neutrality.  The elec. field in turn affects the transport resulting in a deviation from purely diffusive behavior.  However, this was not widely recognized in the literature for nanostructured semiconductor films until very recently.  A detailed anal. is presented.  It is based on the assumption that the c.d. is solenoidal.  Application of the ambipolar diffusion model to a photoelectrochem. cell based on a nanostructured metal oxide film leads to an addnl. term in the transport equation, rather than only a new diffusion coeff. as in earlier work.  Also the boundary conditions interact closely with the equation to form a transport model.
000209434 6531_ $$aporous film oxide ambipolar carrier diffusion photoelectrochem cell
000209434 700__ $$aNister, David
000209434 700__ $$aKeis, Karin
000209434 700__ $$aLindquist, Sten-Eric
000209434 700__ $$0248439$$aHagfeldt, Anders$$g164385
000209434 773__ $$j73$$q411-423$$tSolar Energy Materials and Solar Cells
000209434 909C0 $$0252532$$pLSPM$$xU12908
000209434 909CO $$ooai:infoscience.tind.io:209434$$pSB$$particle
000209434 937__ $$aEPFL-ARTICLE-209434
000209434 973__ $$aOTHER$$rREVIEWED$$sPUBLISHED
000209434 980__ $$aARTICLE