Advanced aRchitectures for ultra-thin high-efficiency CIGS solar cells with high Manufacturability (ARCIGS-M)
The final target of ARCIGS-M is to demonstrate a new CIGS PV architecture, with increased efficiency, improved reliability and stability, at reduced cost and high potential for new applications and markets, where the project will focus on building integrated PV (BIPV). The project’s goals are a reduction in substrate and CIGS material usage, and a performance enhancement by use of industrially viable materials, fabrication methods and equipment. Therefore, the proposed solar cell module design has a 40 % cost reduction potential compared to current industrial state-of-the-art.
This project will use both glass and thin steel substrates. The steel substrate based module can be made light-weight and flexible, which is needed in applications, where weight is an issue. This is often the case for flat roofs on commercial buildings. The glass-glass module has specific BIPV potentials regarding semi-transparent modules (“see-through” modules) and for façade mounting. In order to keep costs low, monolithic integration will be used both for glass and steel, an interconnection technology that leads to an aesthetic dark smooth appearance and has a high active/total area ratio. A full market analysis, targeting various BIPV applications and their technological needs, has started with the support of TTO (www.tto.dk) and will be performed together with stake-holders within the scope of the project. The goal is having a set of feasible products and/or product concepts ready for commercialization at the end of the project.
Within the duration of 36 months, the proposed project’s ambition is to develop advanced materials for the fabrication of novel architectures of photovoltaics (PV) material and demonstrate them in an industrially relevant environment.
Manufacturing of sizable area and integrated dye-sensitized solar cells
The goal of this project is to manufacture DSSC panels of (e.g. 914 mm 580 mm) with 7% efficiency and long-term stability including 200-cycle thermal stability (-40 Celsius to 90 Celsius) and light soaking test (255W/m2 and 500 hr). We also deliver essential chemicals including high-efficiency dyes, stability-secured gel-type electrolytes, various n-type oxide pastes and anti-reflective nanostructures, which will significantly boost the cost reduction and long-term reliability of DSSC panels.
The reliable and high-quality large size DSSC panel is a prerequisite to advancing DSSC space into the real market. Furthermore, large-size DSSC panels will greatly reduce the efficiency loss originating from the interconnection among the panels. Thus, integrating the expertise from each participating organization will facilitate commercialization of DSSCs with a special emphasis on smart windows and building integrated photovoltaic (BIPV) applications.
The goal of this project is to manufacture the large-size DSSC panel (e.g. 914 mm x 580 mm) with 7% or higher efficiency by integrated technologies including current DSSC protocols, plasma display panel (PDP) processing protocols and nano-imprinting technology. Importantly, the usage of the PDP processing protocols can greatly reduce the starting investment for the development and further commercialization of the large-area DSSC panel suitable for smart windows and BIPV applications. Also, moth-eye anti-reflection structures fabricated by a nano-imprinting technique on DSSC substrates can mitigate the efficient reduction of the light reflection from the air-glass interface and allow for the self-cleaning ability of the surface to avoid dust adsorption that will utilize solar energy more efficiently. Furthermore, we can introduce UV-cutting function into anti-reflection coating, which will greatly improve long-term stability of DSSC panels. Accordingly, we will achieve that our panels have the following performance: over 7% solar-to-electricity conversion efficiency and long-term stability including 200-cycle thermal stability (-40 Celsius to 90 Celsius) and light soaking test (255W/m2 and 500 hr). Once we realize the DSSC panel with a size of 914 mm x 580 mm and 7% efficiency, 25 W/panel will be obtained.
Although the photoconversion efficiency of DSSCs is lower than that of market leading CIGS or Si solar cells, positive inherent features of DSSCs as their workability under low light conditions, transparency, conformability, superior performance under low-light conditions and easy integration in buildings will facilitate their market entry. It is anticipated that, if such modules are used as windows and/or roofs, more than half of the electricity consumed in building can be supplied from the Sun. This allows architects to adopt DSSC panels as new construction components for zero-energy building and thus DSSC business will be expanded with our DSSC panels.