• Gao, Mei
• Weerasinghe, Hasitha
• Vak, Doojin

Abstract

In order to bridge the significant efficiency gap between devices fabricated by lab-scale spin coating and scalable deposition methods, and to realize a swift translation from research to commercial scales, industrially compatible processing methods must be used during developmental stages of research. The performances of solution processed thin film solar cells are predominantly determined by the quality of the light absorber layer, which in turn is controlled by the fabrication process. To achieve reliable, pin-hole free, smooth films using a continuous deposition process on a commercially acceptable scale, extraordinary efforts must be dedicated to understanding how the growth process impacts the quality of the printed film, allowing for the identification of key problems and optimisation of the deposition process.In this talk, an overview of our journey from early stage attempts to the current high-TRL technology is presented. The careful optimisation of a range of parameters, including precursor concentration, web speed, solution feeding rate, as well as substrate temperature, was required for the fabrication of high quality films, and will be discussed [1-2] .

Topics

• Deposition
• impedance spectroscopy
• thin film
• spin coating