José M. Marín Beloqui, PhD student under the supervision of Prof. Emilio Palomares, has defended his PhD Thesis entitled “Solution Processed Inorganic Semiconductor Solar Cells” (assigned to the Department of Electronic, Electric and Automatic Engineering of the Universitat Rovira i Virgili) publicly on November 23rd at the ICIQ Auditorium.
The members of his evaluation committee were: Prof. Annamaria Petrozza (Instituto Italiano di Tecnologia), Prof. Iván Mora Seró (Universitat Jaume I) and Prof. Lluis F. Marsal Garví (Universitat Rovira i Virgili).
The thesis has been focused in the different charge recombination process that occurs in inorganic semiconductor solar cells under working conditions. The recognition of these mechanisms will lead to an improvement in both efficiency and stability of this kind of devices. To do this, different optoelectronic techniques have been used in order to identify and quantify these recombination processes. These techniques have been Photo-Induced Charge Extraction (PICE), Photo-Induced Transient PhotoVoltage (PIT-PV), Photo-Induced Transient PhotoCurrent (PIT-PC), Photo-Induced Differential Charging (PIDC) and Laser Transient Absorption Spectroscopy (L-TAS). With the use of these techniques different charge recombination studies have been performed in lead sulfide quantum dot and perovskite solar cells identifying the process that limit their efficiency and improving it avoiding these processes.