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Efficient Solution Processed CH3NH3PbI3 Perovskite Solar Cells with PolyTPD Hole Transport Layer.
- Source :
- Zeitschrift für Naturforschung Section A: A Journal of Physical Sciences; Aug2019, Vol. 74 Issue 8, p665-672, 8p
- Publication Year :
- 2019
-
Abstract
- The organic and hydrophobic polymer poly[N, N′-bis(4-butilphenyl)-N, N′-bis(phenyl)-benzidine] (polyTPD) represents a promising hole transport layer (HTL) for perovskite photovoltaics due to its suitable energy levels, whereby its highest occupied molecular orbital level matches well with the valence band level of methylammonium lead triiodide (CH<subscript>3</subscript>NH<subscript>3</subscript>PbI<subscript>3</subscript>, MAPbI<subscript>3</subscript>) perovskite. However, processing a perovskite layer from the solution on the surface of this organic material, is found to be difficult due to the surface properties of the latter. In this study, we evaluate efficient p-i-n type MAPbI<subscript>3</subscript> perovskite solar cells employing differently processed polyTPD layers. We found that the surface coverage of the MAPbI<subscript>3</subscript> perovskite layer strongly depends on the preparation method of the underlying polyTPD layer. By varying the solvents for the polyTPD precursor, its concentration, and by applying an optimised two-step perovskite deposition technique we increased both the surface coverage of the perovskite layer as well as the power conversion efficiency (PCE) of the corresponding solar cell devices. Our simple solvent-engineering approach demonstrates that no further interface modifications are needed for a successful preparation of efficient planar photovoltaic devices with PCEs in the range of 15 %–16 %. [ABSTRACT FROM AUTHOR]
- Subjects :
- PEROVSKITE
SILICON solar cells
SOLAR cells
FRONTIER orbitals
VALENCE bands
Subjects
Details
- Language :
- English
- ISSN :
- 09320784
- Volume :
- 74
- Issue :
- 8
- Database :
- Complementary Index
- Journal :
- Zeitschrift für Naturforschung Section A: A Journal of Physical Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 137895437
- Full Text :
- https://doi.org/10.1515/zna-2019-0127