Photoelectrolysis of water in sunlight with sensitized semiconductor electrodes

摘要: In all previous studies of the photoelectrolysis water, very little attention has been paid to carrier generation and transport properties optically active semiconductor electrode. To gather such information present work theoretically analyzes spectral response TiO/sub 2/ cells. Comparison with experimental results allows us determine diffusion length minority carriers in for first time. It is hole that governs curve, not electron transport. The quantum efficiency electrodes photolysis mode can be increased 80% by doping crystals Al. sunlight conversion raised 1.3% from 0.4% reported earlier others. device extended into visible portion spectrum through sensitization Cr dopant impurities, allowing hydrogen light. photoelectrolytic processes associated impurity doped are discussed. 36 references.