The fast-booming nanotechnology allows people to explore high performance and low cost photovoltaic (PV) devices.Organic-inorganic hybrid solar cells based on nanostructured semiconductor have built up in few years ago, which can benefit the advantages of both organic and inorganic.However, the device performances are relatively lower than its pristine all-inorganic PV devices, resulting from the numerous surface defect and improper organicinorganic phase segregation.In our group, we have developed various nanostructured semi-conductors by surface/interface engineering for high-performance solar cell.