Moellmann, Alexander, Gedamu, Dawit, Vivo, Paola ORCID: 0000-0003-2872-6922, Frohnhoven, Robert, Stadler, Daniel, Fischer, Thomas, Ka, Ibrahima, Steinhorst, Maximilian, Nechache, Riad, Rosei, Federico ORCID: 0000-0001-8479-6955, Cloutier, Sylvain G., Kirchartz, Thomas ORCID: 0000-0002-6954-8213 and Mathur, Sanjay (2019). Highly Compact TiO2 Films by Spray Pyrolysis and Application in Perovskite Solar Cells. Adv. Eng. Mater., 21 (4). WEINHEIM: WILEY-V C H VERLAG GMBH. ISSN 1527-2648

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Abstract

Transparent and pinhole free hole-blocking layers such as TiO2 grown at low temperatures and by scalable processes are necessary to reduce production costs and thus enabling commercialization of perovskite solar cells. Here, the authors compare the transport properties of TiO2 compact layers grown by spray pyrolysis from commonly used titanium diisopropoxide bisacetylacetonate ([Ti(OPri)(2)(acac)(2)]) precursor to films grown by spray pyrolysis of TiCl4. Spray pyrolysis provides insights into the interdependence of precursor chemistry and electron transport properties of TiO2 films and their influence on the performance of the perovskite solar cells. X-ray diffraction and X-ray photoelectron spectroscopy data confirm the chemical and structural composition of the obtained films. Thin film deposition at lower temperature (150 degrees C) are conducted using TiCl4 to evaluate the influence of crystal growth and topography by scanning electron microscopy and atomic force microscopy as well as thickness (profilometry) and transmittance (UV/Vis spectroscopy) on the power conversion efficiency of perovskite solar cells. TiO2 compact layers grown from TiCl4 enhance the power conversion efficiency by acting as superior electron transfer medium and by reducing hysteresis behavior, when compared to films grown using titanium diisopropoxide bisacetylacetonate. UV/Vis spectroscopy and external quantum efficiency studies reveal the correlation of transmittance on the power conversion efficiency.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Moellmann, AlexanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Gedamu, DawitUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Vivo, PaolaUNSPECIFIEDorcid.org/0000-0003-2872-6922UNSPECIFIED
Frohnhoven, RobertUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Stadler, DanielUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Fischer, ThomasUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Ka, IbrahimaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Steinhorst, MaximilianUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Nechache, RiadUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Rosei, FedericoUNSPECIFIEDorcid.org/0000-0001-8479-6955UNSPECIFIED
Cloutier, Sylvain G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kirchartz, ThomasUNSPECIFIEDorcid.org/0000-0002-6954-8213UNSPECIFIED
Mathur, SanjayUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-151440
DOI: 10.1002/adem.201801196
Journal or Publication Title: Adv. Eng. Mater.
Volume: 21
Number: 4
Date: 2019
Publisher: WILEY-V C H VERLAG GMBH
Place of Publication: WEINHEIM
ISSN: 1527-2648
Language: English
Faculty: Faculty of Mathematics and Natural Sciences
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
ELECTRON-TRANSPORT LAYERS; HOLE-BLOCKING LAYER; LEAD-HALIDE; EFFICIENT; HYSTERESIS; CH3NH3PBI3; PERFORMANCE; IODIDE; EXTRACTION; DEPOSITIONMultiple languages
Materials Science, MultidisciplinaryMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/15144

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