CHARGE-CARRIER DYNAMICS IN NANOPOROUS PHOTOELECTRODES

Some recent results obtained in our group on nanoporous semiconductors are reviewed. Both particulate (TiO2) and crystalline (GaP, SiC) laye rs are considered. Typical structural dimensions are in the 15-150 nm range. These electrodes show greatly enhanced efficiencies for convers ion of light to photocurrent. In addition, majority carrier transport in such systems is surprisingly slow. The factors determining charge c arrier dynamics in nanoporous semiconductor photoelectrodes are discus sed. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.