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Temperature Dependence Of The Electron Diffusion Coefficient In Electrolyte-Filled Tio2 Nanoparticle Films: Evidence Against Multiple Trapping In Exponential Conduction-Band Tails, Nikos Kopidakis, Kurt D. Benkstein, Jao Van De Lagemaat, Quan Yuan, Eric A. Schiff
Temperature Dependence Of The Electron Diffusion Coefficient In Electrolyte-Filled Tio2 Nanoparticle Films: Evidence Against Multiple Trapping In Exponential Conduction-Band Tails, Nikos Kopidakis, Kurt D. Benkstein, Jao Van De Lagemaat, Quan Yuan, Eric A. Schiff
Physics - All Scholarship
The temperature and photoexcitation density dependences of the electron transport dynamics in electrolytefilled mesoporous TiO2 nanoparticle films were investigated by transient photocurrent measurements. The thermal activation energy of the diffusion coefficient of photogenerated electrons ranged from 0.19–0.27 eV, depending on the specific sample studied. The diffusion coefficient also depends strongly on the photoexcitation density; however, the activation energy has little, if any, dependence on the photoexcitation density. The light intensity dependence can be used to infer temperature-independent dispersion parameters in the range 0.3–0.5. These results are inconsistent with the widely used transport model that assumes multiple trapping of electrons in …
Temperature Dependence Of The Electron Diffusion Coefficient In Electrolyte-Filled Tio2, Nikos Kopidakis, Kurt D. Benkstein, Arthur J. Frank, Quan Yuan, Eric A. Schiff
Temperature Dependence Of The Electron Diffusion Coefficient In Electrolyte-Filled Tio2, Nikos Kopidakis, Kurt D. Benkstein, Arthur J. Frank, Quan Yuan, Eric A. Schiff
Physics - All Scholarship
The temperature and photoexcitation density dependences of the electron transport dynamics in electrolytefilled mesoporous TiO2 nanoparticle films were investigated by transient photocurrent measurements. The thermal activation energy of the diffusion coefficient of photogenerated electrons ranged from 0.19–0.27 eV, depending on the specific sample studied. The diffusion coefficient also depends strongly on the photoexcitation density; however, the activation energy has little, if any, dependence on the photoexcitation density. The light intensity dependence can be used to infer temperature-independent dispersion parameters in the range 0.3–0.5. These results are inconsistent with the widely used transport model that assumes multiple trapping of electrons in …