NiOx and K:doped NiOx for p-i-n perovskite solar cells
[Available from Jan. 2023]
Project motivation: Optimal charge transport layers in halide perovskite solar cells is the key  not only to their high power conversion efficiency  but also to their long term operation stability . NiOx is a promising wide bandgap material that has been studied extensively in recent years as a hole transporting layer (HTL) in perovskite solar cells (PSCs). However, low conductivity and surface traps are limiting the performance of NiOx-based PSCs . These can be suppressed by introducing dopants such as Cu, Ag, K, and Co [5,6]. Among all, potassium (K) has proven as an effective dopant to increase the hole mobility as well as to tune the NiOx work function for halide perovskite solar cell applications .
Project goal: Study NiOx and K-doped NiOx prepared by Pulsed Laser Deposition (PLD) and investigate the possible role of K in the crystal structure, morphology, optical and electronic transport properties. Manipulate the growth conditions and post-treatments to fine-tune the optoelectronic properties of thin films for application in perovskite solar cells. Final goal is implementation of optimized films in proof-of-concept perovskite solar cells and relating its properties to photovoltaic performance of PSC.
Tasks of MSc student: Thin-films of NiOx and K:NiOx will be prepared by PLD technique. Characterization of film properties will be performed on their structural (XRD), electrical (Hall effect), optical (UV-Vis) and morphological (AFM/SEM) properties. Additionally, compositional analysis and energy levels will be determined with XPS/UPS. Fabrication of solar cells with optimized NiOx film as HTL.
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 M. Yang, et al., Thin Solid Films, 2012, 520(18), 5884-5888.
*Option for Capital Selecta course: Introduction to Optoelectronic Materials (5 EC).
Suzana Kralj email@example.com , Wiria Soltanpoor firstname.lastname@example.org
Monica Morales-Masis, CR 3237, email@example.com , +31534891791