Flexible Perovskite Photovoltaic Modules and Solar Cells Based on Atomic Layer Deposited Compact Layers and UV-Irradiated TiO2 Scaffolds on Plastic Substrates

Fabio Matteocci^a, Pescetelli Sara^a, Francesco Di Giacomo^a, Thomas M. Brown^a, Aldo Di Carlo^a, Stefano Razza^a, Valerio Zardetto^b, Mariadriana Creatore^b, Wilhelmus M. M. Kessels^b, Alessandra D'Epifanio^c, Silvia Licoccia^c

^aCHOSE - Centre for Hybrid and Organic Solar Energy, University of Rome ‘‘Tor Vergata’’, Via del Politecnico, 1, Roma, Italy

^bEindhoven University of Technology, Department of Applied Physics, 5600MB, Eindhoven, Netherlands

^cUniversity of Rome Tor Vergata, Department of Chemical Science and Technologies, Italy, Via della Ricerca Scientifica, 1, Roma, Italy

^dSolar Research Solliance, High Tech Campus 21, Eindhoven, 5656 AE

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Oral, Francesco Di Giacomo, presentation 215
Publication date: 5th February 2015

Organometallic halide perovskite are the most promising novel materials for thin-film photovoltaics, exhibiting efficiencies of over 20%.[1] The low temperature processing of this material (below 130°C) enables one to develop the technology on flexible plastic films if low temperature processes can also be adopted for the other material layers. While the deposition of an organic hole transport material is usually carried out at room temperature, the mesoscopic electron transport scaffold and compact layers typically require sintering at high temperatures, incompatible with plastics. Here we present a method to prepare a double layered TiO₂ on PET/ITO foil in order to optimize both hole blocking and electron extraction processes. A new type of low temperature processed printable TiO₂ scaffold was successfully developed to fabricate efficient flexible photovoltaic devices. By using UV irradiation to remove organic binders and promote interparticle bonding, together with a low temperature plasma assisted ALD compact layer, the best flexible plastic solar cells we fabricated exhibited an efficiency of 8.4%.[2] This is the first report on a low temperature processed mesoporous TiO₂ for perovskite solar cells, which enhanced efficiency and durability with respect to their planar equivalents, with good flexibility down to 1 cm radii of curvature. The formulation of a screen printable TiO₂ paste, together with the definition of the ALD compact layers via masking/laser patterning procedures (see Figure), was instrumental in enabling the first demonstration of a series-connected flexible perovskite module with a power conversion efficiency of 3.1%.[2]
Top panel: colored cross-section SEM image of a plastic cell with ALD deposited TiO2 compact layer and with UV irradiated mesoporous TiO2 colors are only rough guide the eye; Bottom panel: picture of the 4 cell series-connected module (5.6 cm x 5.6 cm)
[1] NREL chart, http://www.nrel.gov/ncpv/, accessed Jan 2015 [2] Di Giacomo, F.; Zardetto, V.; D'Epifanio, A.; Pescetelli, S.; Matteocci, F.; Razza, S.; Di Carlo, A.; Licoccia, S.; Kessels W. H. H.; Creatore, M.; Brown, T. M.; Flexible Perovskite Photovoltaic Modules and Solar Cells Based on Atomic Layer Deposited Compact Layers and UV‐Irradiated TiO2 Scaffolds on Plastic Substrates. Advanced Energy Materials 2015

nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.

MATSUS

Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.

International Conference on Hybrid and Organic Photovoltaics

International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.

Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics

The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.

International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics

The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.