CuInS2 Solar Cells by Air-Stable Ink Rolling

摘要

Solution-based deposition techniques are widely considered to be a route to low-cost, high-throughput photovoltaic device fabrication. In this report, we establish a methodology for a highly scalable deposition process and report the synthesis of an air-stable, vulcanized ink from commercially available precursors. Using our air-stable ink rolling (AIR) process, we can make solar cells with an absorber layer that is flat, contaminant-free, and composed of large-grained CuInS2. The current−voltage characteristics of the devices were measured in the dark and under 100 mW/cm2 illumination intensity, and the devices were found to have Jsc = 18.49 mA/cm2, Voc = 320 mV, FF = 0.37, and η = 2.15%. This process has the ability to produce flat, contaminant-free, large-grained films similar to those produced by vacuum deposition, and its versatility should make it capable of producing a variety of materials for electronic, optoelectronic, and memory devices.