Indirect Liftoff Mechanism for High-Throughput,Single-Source Laser Scribing for Perovskite Solar Modules |
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Authors: | Austin C Flick Nicholas Rolston Reinhold H Dauskardt |
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Institution: | Department of Materials Science and Engineering, Stanford University, Stanford, CA, 94305-2205 USA |
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Abstract: | A high-throughput, single-source laser scribing method exploiting a transparent conducting oxide (TCO) indirect liftoff mechanism is developed to produce serially interconnected perovskite solar modules. The TCO-based indirect liftoff mechanism relies solely on laser absorption in the front transparent electrode material reducing thermal damage to the overlying layers and allowing for fast scribing speeds with low-cost μs-pulse duration fiber laser systems. Minimal resistive power losses are observed with the method compared to conventional ablative laser scribes, maintaining the power conversion efficiencies of small-area devices (≈0.2 cm2) across significantly larger deposition areas (≈1 cm2). Demonstrating > 3 m s−1 processing speeds, TCO-based liftoff provides the highest throughput laser scribing method for thin-film photovoltaic devices produced on glass/TCO substrates, capable of processing large-area perovskite solar modules at a manufacturing scale. |
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Keywords: | ablation contact resistance laser scribing modules perovskite photovoltaics |
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