Proceedings of nanoGe September Meeting 2015 (NFM15)
Publication date: 8th June 2015
Hybrid solar cells that comprise both organic and inorganic semiconductor materials are emerging as a promising power generation technology. This primarily stems from the possibility to design devices that take advantage of the attractive properties of both organic and inorganic semiconductors. In this context, organometal trihalide perovskites are currently generating great interest with respect to application in solution-processed solar cells. In this talk, I report some of our recent work aimed at understanding the factors (e.g. oxygen, light etc) influencing the environmental stability methyl ammonium lead triiodide (MAPbI3) films and solar cells. Upon exposure to both light and oxygen (moisture free environment) the MAPbI3 photoactive layers rapidly degrade (timescale of hours to few days) giving PbI2, I2 and methylamine as degradation products [1, 2]. I will discuss the impact of this important degradation pathway on interfacial charge transfer kinetics and device performance and outline ways in which this degradation pathway can be avoided. In the second part of this talk I will also present some of our recent work addressing the development of new fabrication methods for Metal chalcogenide solar cells. Here we will focus solution processable precursor routes to tin (II) sulfide semiconductor films.