UTFacultiesTNWClustersResearch groupsIMSThesis assignmentsNiOx and K:doped NiOx for p-i-n perovskite solar cells

NiOx and K:doped NiOx for p-i-n perovskite solar cells

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 [1] not only to their high power conversion efficiency [2] but also to their long term operation stability [3]. 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 [4]. 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 [7].

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.

[1] S. Sahare et al., Adv. Energ. Mater., 2021, 11(42), 2101085
[2] M. Ansari et al., J. Photochem. Photobiol., 2018, 35, 1-24.
[3] H. H. Park, Nanomaterials, 2021 12(1), 112.
[4] X. Zheng, et al., J. Mater. Chem. C, 2020, 8, 1972--1980
[5] P. C. Chen, et al. ACS Appl. Energy Mater., 2019, 2(9), 6705-6713.
[6] L. Xu, et al., Nano Energy, 2019, 63, 103860.
[7] 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 s.k.kralj@utwente.nl , Wiria Soltanpoor w.soltanpoor@utwente.nl
Monica Morales-Masis, CR 3237, m.moralesmasis@utwente.nl , +31534891791