Programme
Season 2024/2025
University of Linköping, SE
Over the past decade, perovskite light-emitting diodes (PeLEDs) have rapidly emerged as a top contender for next-generation lighting and display technologies. While previous work has largely focused on pushing device performance to its limits, the transition toward commercialization calls for a broader view of sustainability. Environmental, economic, and technical factors all play critical roles for stakeholders—from policymakers shaping legislation, to manufacturers seeking profitability, and consumers’ willingness to pay. However, such life cycle-based design thinking is not yet common practice. In this talk, we will present a life cycle assessment (LCA) and techno-economic assessment (TEA) of cutting-edge PeLEDs (including RGB, white, and near-infrared devices), highlighting the environmental impacts and cost drivers that influence their potential for sustainable commercialization. By pinpointing the key stages for improvement, we map out technical upgrade pathways to enhance sustainability. To more accurately quantify the benefits of these improvements, we introduce the concept of “relative impact mitigation time,” indicating the operational lifetime needed for PeLEDs to offset their life cycle burdens. Finally, we propose technical upgrading strategies into future PeLED research and development, thereby promoting a more holistic path toward sustainable commercialization.
23 April 2025
Oussama Er-raji
Fraunhofer ISE, DE
Advancing industry-compatible perovskite/silicon tandem solar cells: the fully-textured pathway
Fully-textured perovskite/silicon tandem solar cells present a promising avenue for developing cost-effective and highly efficient photovoltaic technologies. From an industrialization standpoint, these tandem cells capitalize on existing silicon production infrastructure, which typically yields front-side textured silicon with pyramidal features larger than 1 µm. Optically, this architecture minimizes reflection losses, thereby maximizing energy yield under real-world conditions. The perovskite absorber is typically deposited via a two-step evaporation/wet-chemical method, enabling conformal film formation on the large silicon pyramids. To achieve optimal device performance, perovskite crystallization using the two-step method must be well-controlled, the contact layers must be tailored for high conformity on textured silicon, and the interfacial passivation layers must meet the requirements for compatibility and uniformity on the increased surface area of the perovskite film. Here, we explore these aspects of device development, employing techniques such as in situ X-ray diffraction and X-ray photoelectron spectroscopy for film formation analysis, suns-photoluminescence, suns-Voc, and bias-assisted charge extraction for device characterization, as well as optoelectrical simulations to guide strategies for efficiency improvement. A certified power conversion efficiency of 31.6% is achieved, and key steps to bridge the gap to the practical efficiency potential – determined to be 39.5% – are discussed.
14 May 2025
Junia Solomon, NL
MESA+ Institute for Nanotechnology, University of Twente, NL
Layered metal halide perovskites by Pulsed laser deposition
Epitaxial and heteroepitaxial growth of metal halide perovskites (MHPs) provides a unique platform to understand the relationship between material properties and processing, while also enabling studies of polymorph stabilization and substrate-induced strain control.
Pulsed laser deposition (PLD), a physical vapor deposition technique, is a dry, single-source vapor-phase technique with unique capabilites for depositing MHPs on a variety of substrates [1]–[5]. Here, we discuss the use of PLD for the epitaxial growth of CH3NH3PbI3 (MAPbI3) on KCl single-crystal substrates. The stabilization of the cubic polymorph at room temperature was confirmed using reciprocal space maps, pole figures and electron backscatter diffraction (EBSD) [5]. Photoluminescence (PL) measurements confirm a bandgap of 1.64 to 1.66 eV, consistent with the cubic phase. Beyond MAPbI3, we demonstrate the epitaxial growth of CsSnI3, another halide perovksite closely lattice-matched to KCl. The critical role of the PLD parameters in achieveing epitaxy for both hybrid and inorganic perovskites is discussed. Finally, moving beyond 3D perovskites, we present the growth of highly oriented (PEA)2PbI4 films via PLD atop epitaxial MAPbI3. X-ray diffraction, grazing incidence wide-angle scattering (GIWAXS), and PL mapping were used to probe the structure, texture, morphology, and stability 2D/3D layers. This work highlights the potential of vapor-based growth for metal halide perovskites via PLD, paving the way for direct heterostructure development and device integration.
References:
[1] T. Soto-montero et al., “Single-Source Pulsed Laser Deposition of MAPbI3,” IEEE 48th Photovolt. Spec. Conf., pp. 1318–1323, 2021.
[2] V. M. Kiyek et al., “Single-Source, Solvent-Free, Room Temperature Deposition of Black γ-CsSnI3 Films,” Adv. Mater. Interfaces, vol. 7, no. 11, pp. 1–5, 2020, doi: 10.1002/admi.202000162.
[3] T. Soto-Montero et al., “Single-Source Vapor-Deposition of MA1–xFAxPbI3 Perovskite Absorbers for Solar Cells,” Adv. Funct. Mater., 2023, doi: 10.1002/adfm.202300588.
[4] N. Rodkey et al., “Pulsed Laser Deposition of Cs2AgBiBr6: From Mechanochemically Synthesized Powders to Dry, Single-Step Deposition,” Chem. Mater., vol. 33, no. 18, pp. 7417–7422, 2021, doi: 10.1021/acs.chemmater.1c02054.
[5] J. S. Solomon et al., “Room-temperature epitaxy of α-CH3NH3PbI3 halide perovskite by pulsed laser deposition,” Nat. Synth., Jan. 2025, doi: 10.1038/s44160-024-00717-z.
28 May 2025
Maurizio Stefanelli
Centre for Hybrid and Organic Solar Energy, University of Rome "Tor Vergata", IT
TBA
11 June 2025
Xun Xiao
Peking University, CN
TBA
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