Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
Photovoltaic tandem technology has the potential to boost the power conversion efficiency (PCE) of organic solar cells approaching or even exceeding 15 % according to several independently reported predictions. The tandem concept involves stacking two or more cells with complementary absorption spectra in series or parallel connection, harvesting photons at the highest possible potential. The intermediate layer (IML) consisting of a hole and an electron transporting layer is considered to lie at the heart of organic tandem structure. To push organic tandem solar cells towards large-scale production and commercial applications, development of reliable and low temperature processed IMLs is required.
In this contribution, we demonstrate various fully solution-processed IMLs for efficient organic tandem solar cells with either a regular or an inverted architecture [1-4]. Owing to their excellent functionality and reliability, this kind of IMLs represents a convenient way for facilitating fabrication of organic tandem solar cells comprising of double, triple or quadruple junctions. Moreover, the tandem solar cells are fabricated by using doctor-blading deposition method at fairly low temperatures (<80 °C) in air, which are fully compatible with roll-to-roll mass production. The tandem solar cells based on glass and flexible substrates achieve a PCE of up to 8 % and 6 %, respectively.
Optical and electrical simulations are performed to analyze the performance of organic tandem solar cells. The outcome of simulations is in great agreement with experimental values, indicating again the excellent functionality of the low-temperature solution-processed IMLs. Based on optical simulations, we investigate the potential of commercially available donor materials for organic tandem solar cells. A maximum PCE of 10 % is achievable for tandem solar cells based on already commercially available donors in combination with PCBM. In addition, by incorporating experimentally feasible values of FF=75 % and constant EQE=80 % into efficiency prediction, a maximum PCE of 21 % is theoretically achievable for organic tandem solar cells.
[1] Li, N.; Baran, D.; Forberich, K.; Turbiez, M.; Ameri, T.; Krebs, F.; Brabec, C. An Efficient Solution-Processed Intermediate Layer for Facilitating Fabrication of Organic Multi-Junction Solar Cells. Advanced Energy Materials 2013, 3, 1597-1605. [2] Li, N.; Baran, D.; Forberich, K.; Machui, F.; Ameri, T.; Turbiez, M.; Carrasco-Orozco, M.; Drees, M.; Facchetti, A.; Krebs, F. C.; Brabec, C. J. Towards 15% energy conversion efficiency: a systematic study of the solution-processed organic tandem solar cells based on commercially available materials. Energy & Environmental Science 2013, 6, 3407-3413. [3] Li, N.; Kubis, P.; Forberich, K.; Ameri, T.; Krebs, F. C.; Brabec, C. J. Towards large-scale production of solution-processed organic tandem modules based on ternary composites: Design of the intermediate layer, device optimization and laser based module processing. Solar Energy Materials & Solar Cells 2014, 120, 701-708. [4] Li, N.; Baran, D.; Spyropoulos, G. D.; Zhang, H.; Berny, S.; Turbiez, M.; Ameri, T.; Krebs, F. C.; Brabec, C. J. Printing organic tandem solar cells towards 20% power conversion efficiency. Submitted.
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.
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.
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.