Understanding the Role of Surface States on Mesoporous NiO Films.

ABSTRACT: Surface states of mesoporous NiO semiconductor films have particular properties differing from the bulk and are able to dramatically influence the interfacial electron transfer and adsorption of chemical species. To achieve a better performance of NiO-based p-type dye-sensitized solar cells (p-DSCs), the function of the surface states has to be understood. In this paper, we applied a modified atomic layer deposition procedure that is able to passivate 72% of the surface states on NiO by depositing a monolayer of Al₂O₃. This provides us with representative control samples to study the functions of the surface states on NiO films. A main conclusion is that surface states, rather than the bulk, are mainly responsible for the conductivity in mesoporous NiO films. Furtherm

SUBMITTER: Tian L 

PROVIDER: S-EPMC7596758 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature