Novel Flexible Plastic-Based Solar Cells.

摘要

Our scientific efforts in this project focused on the development of efficient solution-processing for solid state photovoltaic cells by spin- coating and spraying techniques, to produce broad-band light harvesting hybrid solar cells with bulk and layered heterojunction of inorganic semiconductor nanocrystals (NCs) and hole transporting polymers. Specifically, we achieved significant progress in fabrication and characterization of three different types of solar cells: (1) Synthesis of hole transporting low band gap polymers, development of ligand exchange in a nanocomposite, and fabrication of hybrid bulk heterojunction photovoltaic cell using a blend film of polymer-inorganic NCs; (2) Fabrication of newly designed hybrid solar cells that are composed of a electron transport layer (TiO2), a light sensitizing layer (NCs), and a hole transport layer (polymer); (3) Development of thin film solar cells using low- cost spray technique and performance enhancement of its hybrid device. Photovoltaic characteristics were evaluated. The result showed the high performance of approximately 6% power conversion efficiency for solar cell type 2 above.