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The rapid development of organic-inorganic hybrid perovskite solar cells has resulted in laboratory-scale devices having power conversion efficiencies that are competitive with commercialised technologies. However, hybrid perovskite solar cells are yet to make an impact beyond the research community, with translation to large-area devices fabricated by industry-relevant manufacturing methods remaining a critical challenge. Here we report the first demonstration of hybrid perovskite solar cell modules, comprising seriallyinterconnected cells, produced entirely using industrial roll-to-roll printing tools under ambient room conditions. As part of this development, costly vacuum-deposited metal electrodes are replaced with printed carbon electrodes. A high-throughput experiment involving the analysis of batches of 1600 cells produced using 20 parameter combinations enabled rapid optimisation over a large parameter space. The optimised roll-to-roll fabricated hybrid perovskite solar cells show power conversion efficiencies of up to 15.5% for individual small-area cells and 11.0% for serially-interconnected cells in large-area modules. Based on the devices produced in this work, a cost of ~0.7 USD W−1 is predicted for a production rate of 1,000,000 m2 per year in Australia, with potential for further significant cost reductions. [ABSTRACT FROM AUTHOR]

The industry for producing silicon solar cells and modules has grown remarkably over the past decades, with more than a 100‐fold reduction in price over the past 45 years. The main solar cell fabrication technology has shifted over that time and is currently dominated by the passivated emitter and rear cell (PERC). Other technologies are expected to increase in market share, including tunnel‐oxide passivated contact (TOPCon) and heterojunction technology (HJT). In this paper, we examine the cost potential for using atomic layer deposition (ALD) to form transition metal oxide (TMO) layers (MoOx, TiOx and aluminium‐doped zinc oxide [AZO]) to use as lower cost alternatives of the p‐doped, n‐doped and indium tin oxide (ITO) layers, respectively, the layers normally used in HJT solar cells. Using a bottom‐up cost and uncertainty model with equipment cost data and process experience in the lab, we find that the production cost of these variations will likely be lower per wafer than standard HJT, with the main cost drivers being the cost of the ALD precursors at high‐volume production. We then considered what efficiency is required for these sequences to be cost effective in $/W and discuss whether these targets are technically feasible. This work motivates further work in developing these ALD TMO processes to increase their efficiency towards their theoretical limits to take advantage of the processing cost advantage. [ABSTRACT FROM AUTHOR]

Stacking two photovoltaic (PV) cells to form a tandem structure can improve the efficiency of PV modules, and if achieved at sufficiently low cost, could dominate the PV market in the future. Rapid progress in silicon–perovskite tandem (SPT) cell efficiency has been made, so cost modelling is becoming important in analysing the commercial attractiveness of this approach. While previous cost modelling assumed idealised production processes, this work focuses first on six demonstrated SPT sequences using both homojunction and heterojunction bottom silicon cells, analysed in detail using a bottom‐up cost and uncertainty model and then compared with other reported SPT high‐efficiency cells. This identifies cost barriers in the perovskite cell, including high‐cost hole transport material (HTM) and electron transport layer (ETL) materials such as (2,2′,7,7′‐tetrakis[N,N‐di(4‐methoxyphenyl)amino]‐9,9′‐spirobifluorene [SPIRO] and [6,6]‐phenyl‐C61‐butyric acid methyl ester [PCBM]), and the use of spin coating which has a high wastage rate. Once these cost issues are solved, the silicon cell cost becomes important, and the use of lower cost homojunction cells with p‐type wafers can further reduce costs. A hypothetical medium term low‐cost sequence that combines the lowest cost parts of the analysed sequences and an improved perovskite deposition process has a projected likely cost of $1.50/cell, which if combined with 25% efficiency would give a favourable levelised cost of electricity (LCOE) compared with industry standard c‐Si cells. This analysis guides research directions to address cost issues in parallel with higher efficiencies in this technology area. [ABSTRACT FROM AUTHOR]

ABSTRACT Polycrystalline silicon films of 10 μm thickness are formed on glass in a single-step continuous wave diode laser crystallisation process, creating large crystal grains up to 1 mm wide and 10 mm long. Solar cells are formed on the layers by employing a rear point contacting scheme. Intermediate layers between the glass and the silicon are shown to heavily influence the cell characteristics. A stack of silicon oxide/silicon nitride/silicon oxide has produced the best cell efficiency so far of 8.4 % with open-circuit voltage of 557 mV. With simple optimisation of the contacting scheme, 10 % efficient cells are expected in the near future. Copyright © 2012 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]