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Enhancing moisture tolerance in efficient hybrid 3D/2D perovskite photovoltaics

Title data

Koh, Teck Ming ; Shanmugam, Vignesh ; Guo, Xintong ; Lim, Swee Sien ; Filonik, Oliver ; Herzig, Eva M. ; Müller-Buschbaum, Peter ; Swamy, Varghese ; Chien, Sum Tze ; Mhaisalkar, Subodh G. ; Mathews, Nripan:
Enhancing moisture tolerance in efficient hybrid 3D/2D perovskite photovoltaics.
In: Journal of Materials Chemistry A. Vol. 6 (2018) Issue 5 . - pp. 2122-2128.
ISSN 2050-7496
DOI: https://doi.org/10.1039/C7TA09657G

Abstract in another language

Surface imperfections in perovskite films upon crystallization may trigger trap-assisted non-radiative recombination which is a dominant recombination mechanism that potentially restricts the performance of solar devices. In this work, 2D alkylammonium halide perovskites are formed on the 3D perovskite structure to passivate interfacial defects and vacancies and enhance moisture tolerance. The hybrid 3D/2D perovskite films possess longer photoluminescence lifetimes, as well as lower trap state densities, indicating the passivation of cationic and halide vacancies on the surface or grain boundaries, thereby reducing the non-radiative recombination pathways. More importantly, the hybrid 3D/2D perovskite exhibits higher ambient stability than a pure 3D perovskite where the hydrophobic nature of the long aliphatic carbon chains in the 2D perovskite provide an additional moisture repelling effect to the entire perovskite film. With this approach, the power conversion efficiency of perovskite solar cells was improved from 14.17 to 15.74 along with improved device stability. The hybrid 3D/2D perovskite solar cell retained 86 of its initial power conversion efficiency whereas the control device lost almost 40 of its overall efficiency. Thus, the hybrid 3D/2D perovskite structure is an alternative solution for modulating defects and trap-state densities in high efficiency perovskite solar cells with simultaneously enhanced moisture stability.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Juniorprofessur Experimentalphysik VII - Dynamik und Strukturbildung > Juniorprofessur Experimentalphysik VII - Dynamik und Strukturbildung - Juniorprof. Dr. Eva Maria Herzig
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Juniorprofessur Experimentalphysik VII - Dynamik und Strukturbildung
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 28 Mar 2018 06:38
Last Modified: 16 Apr 2018 11:38
URI: https://eref.uni-bayreuth.de/id/eprint/43168