Proceedings of Asia-Pacific Conference on Perovskite, Organic Photovoltaics&Optoelectronics (IPEROP25)
Publication date: 17th October 2024
The development of large-area all-perovskite tandem solar modules presents a promising advancement in photovoltaic (PV) technology, offering significant potential for improving efficiency and cost-effectiveness in renewable energy. This work provides an overview of the scalable manufacturing processes and challenges associated with producing both rigid and flexible large-area two-terminal (2T) and four-terminal (4T) all-perovskite tandem modules, towards scalable sheet-to-sheet and roll-to-roll manufacturing of efficient solar devices.
In our research, efficient and stable wide band-gap (WBG) semi-transparent perovskite solar cells (ST-PSCs) were manufactured through optimization of the device stack, reducing optical and electrical losses. This led to ST-PSCs efficiencies of 20.7% for spin-coated (1.6 eV) and 18.1% for blade-coated (1.7 eV) small area (0.09 cm2) devices with high near infra-red (NIR) transparency for tandem application. Tandem solar cells offer a way to higher PCEs by stacking cells with different bandgaps on top of each other, which results in a more optimal utilization of the solar spectrum. A dual passivation approach, targeting both bulk and perovskite/electron transport layer (ETL) interfaces, successfully minimized non-radiative recombination losses. Additionally, reference narrow band-gap (NBG) ST-PSCs (1.25 eV) with 17.3% efficiency were developed for fabricating of bifacial all-perovskite tandem solar cells and modules. Both the optimized WBG and NBG ST-PSCs retained 95% of their initial stabilized power conversion efficiency (PCE) after 1000 hours of aging at 85°C in a nitrogen atmosphere, while control devices degraded within a few days. As a reference, for all-perovskite tandem devices, spin-coated and blade-coated small area WBG ST-PSCs were coupled with a silicon heterojunction (SHJ) bottom solar cell leading to 31.2% and 28.5% stabilized PCE respectively, with more than 6.4% and 3.8% absolute efficiency gain with respect to the standalone bottom Si cell. Importantly, we successfully transferred the technology from small-area device manufacturing to scalable processes for potential large-volume production. As a result, semi-transparent WBG, NBG, and monolithic 2T all-perovskite tandem modules with an aperture area of 100 cm² were fabricated using slot-die coating, evaporation, sputtering, and spatial atomic layer deposition (sALD) scalable techniques. Encapsulated control ST WBG and NBG modules demonstrated a PCE of 10.0% under monofacial conditions and retained nearly 100% of their initial stabilized PCE after 1000 hours of aging under 85% RH/85°C damp-heat stress conditions. The results of optimized bifacial ST WBG, NBG, and tandem devices will be presented during the conference after proper characterization. To our knowledge, this is the first global report on the upscaling of NBG and all-perovskite tandem devices in 100cm2 area via slot-die coating perovskite layers. We believe these findings represent a crucial step towards the commercialization of all-perovskite tandem solar technologies.
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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.
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.