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Materials 2019, 12(1), 162; https://doi.org/10.3390/ma12010162

Low Temperature Solution-Processable 3D-Patterned Charge Recombination Layer for Organic Tandem Solar Cells

1
LPICM, CNRS, Ecole Polytechnique, Université Paris Saclay, 91128 Palaiseau, France
2
LICSEN, NIMBE, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France
*
Author to whom correspondence should be addressed.
Received: 7 December 2018 / Revised: 22 December 2018 / Accepted: 25 December 2018 / Published: 7 January 2019
(This article belongs to the Special Issue Advances and Challenges in Organic Electronics)
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Abstract

We propose a novel method to pattern the charge recombination layer (CRL) with a low-temperature solution-processable ZnO layer (under 150 °C) for organic solar cell applications. Due to the optimal drying process and thermal annealing condition, ZnO sol-gel particles formed a three-Dimensional (3D) structure without using a high temperature or ramping method. The generated 3D nano-ripple pattern showed a height of around 120 nm, and a valley-to-valley distance of about 500 nm. Based on this newly developed ZnO nano-ripple patterning technique, it was possible to pattern the CRL without damaging the underneath layers in tandem structure. The use of nano-ripple patterned ZnO as the part of CRL, led to the concomitant improvement of the power conversion efficiency (PCE) of about 30%, compared with non-patterned CRL device. View Full-Text
Keywords: organic tandem solar cell; 3D nano-ripple pattern; ZnO sol-gel; charge recombination layer; low temperature solution process organic tandem solar cell; 3D nano-ripple pattern; ZnO sol-gel; charge recombination layer; low temperature solution process
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Choi, J.W.; Jin, J.W.; Tondelier, D.; Bonnassieux, Y.; Geffroy, B. Low Temperature Solution-Processable 3D-Patterned Charge Recombination Layer for Organic Tandem Solar Cells. Materials 2019, 12, 162.

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