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

Jin Woo Choi (1) , Jong Woo Jin (1) , Denis Tondelier (1) , Yvan Bonnassieux (1) , Bernard Geffroy (2)

1 LPICM - Laboratoire de physique des interfaces et des couches minces [Palaiseau]
2 LICSEN UMR 3685 - Laboratoire Innovation en Chimie des Surfaces et NanoSciences

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.

Mots clés: organic tandem solar cell; 3D nano-ripple pattern; ZnO sol-gel; charge recombination layer; low temperature solution process

Domaines: Sciences de l'ingénieur [physics]; Matériaux; Energie électrique

Jin Woo Choi, Jong Woo Jin, Denis Tondelier, Yvan Bonnassieux, Bernard Geffroy. Low Temperature Solution-Processable 3D-Patterned Charge Recombination Layer for Organic Tandem Solar Cells. Materials, 2019, ⟨10.3390/ma12010162⟩. ⟨hal-01972501⟩