PP2.1j (ii): Organic, Inorganic Hybrid Solar Cells

Project Coordinator: 
Monash University
Chief Investigators: 
Yi-Bing Cheng
Associate Investigators: 
CSIRO

Organic Hole Transport Materials (HTMs) are commonly used in hybrid organic I inorganic (perovskite) solar cells to promote higher conversion efficiencies. Spiro-OMeTAD is the current standard organic HTM employed in the fabrication of perovskite solar cells. However, the synthesis and purification procedures make this HTM expensive and unsuitable for very large scale production. Additionally, the additives such as tert-butylpyridine and Lithium bis(Trifluoromethanesulfonyl) Imide (LiTFSI) which are used to make it more efficient, also make it unstable due to ingress of moisture. 

The aim of this project is to develop novel HTMs, both organic and metal complexes, that can rival Spiro-OMeTAD in te rms of efficiency but be of much easier synthesis and hence lower production costs and more easily up-scalable. The second aim is to try to overcome some of the SpiroOMeTAD limitations- namely low conductivity and the need for additives like tert-butylpyridine and LiTFSI. The study also extends towards the characterisation of the devices on commonly observed phenomenon J-V hysteresis.