Ms. Diana Rueda Profile

Diana Rueda

Doctoral Candidate

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Proceedings Article | 2 November 2016 Presentation

Multipass inkjet printing of methylammonium lead iodide for planar perovskite solar cells (Conference Presentation)

Florian Mathies, Tobias Abzieher, Diana Rueda, Aina Quintilla, Ulrich Lemmer

Proceedings Volume 9942, 994209 (2016) https://doi.org/10.1117/12.2238163

KEYWORDS: Crystals, Perovskite, Titanium dioxide, Solar cells, Lead, Photovoltaics, Printing, Electron transport, Optical testing, Inkjet technology

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We show inkjet printed state-of-the-art perovskite solar cells with efficiencies of up to 12% which is an important step towards fully printed large scale production of photovoltaic perovskite devices. In comparison, the spin-coated reference achieves 13% efficiency. In both cases, the solar cell absorbers are prepared using a one-step process on a TiO2 compact layer without mesoporous intermediate layer as electron transport material and spiroMeOTAD as hole transport material. Moreover, we show that controlling printing parameters, like drop spacing and size, is essential to optimizing the final perovskite performance. Whereas parameters were initially controlled to be consistent with a final layer thicknesses known from literature, subsequent processes were aimed at also controlling crystallinity and roughness. To demonstrate the homogeneity of the printed devices, light beam induced current measurements (LBIC) were made. To evaluate the quality of the perovskite layer and the charge transfer efficiency in the device, time resolved photoluminescence measurements were conducted on the perovskite with and without electrical transport layers. Light soaking effects were also investigated and evaluated. Important differences between printed and spin-coated devices will be outlined, as well as other relevant parameters to optimize printed device performance.

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