• Goaer, Gilles
• Ramos, F. Javier
• Schneider, Nathanaelle
• Jutteau, Sebastien
• Posada, Jorge
• Loones, Nicolas
• Bodeux, Romain
• Rousset, Jean
• Rebai, Amelle
• Broussillou, Cedric
• Lombez, Laurent
• Guillemot, Thomas
• Bercegol, Adrien
• Ory, Daniel

Abstract

<jats:title>Abstract</jats:title><jats:p>In this work, the fabrication of MoO<jats:sub>x</jats:sub>-free semitransparent perovskite solar cells (PSC) with Power Conversion Efficiencies (PCE) up to 15.7% is reported. Firstly, opaque PSCs up to 19.7% were fabricated. Then, the rear metal contact was replaced by a highly transparent and conductive indium tin oxide (ITO) film, directly sputtered onto the hole selective layer, without any protective layer between Spiro-OMeTAD and rear ITO. To the best of our knowledge, this corresponds to the most efficient buffer layer-free semitransparent PSC ever reported. Using time-resolved photoluminescence (TRPL) technique on both sides of the semitransparent PSC, Spiro-OMeTAD/perovskite and perovskite/TiO<jats:sub>2</jats:sub> interfaces were compared, confirming the great quality of Spiro-OMeTAD/perovskite interface, even after damage-less ITO sputtering, where degradation phenomena result less important than for perovskite/TiO<jats:sub>2</jats:sub> one. Finally, a 4-terminal tandem was built combining semitransparent PSC with a commercially-available Aluminium Back Surface Field (Al-BSF) silicon wafer. That silicon wafer presents PCE = 19.52% (18.53% after being reduced to cell size), and 5.75% once filtered, to generate an overall 4 T tandem efficiency of 21.18% in combination with our champion large semitransparent PSC of 15.43%. It means an absolute increase of 1.66% over the original silicon wafer efficiency and a 2.65% over the cut Si cell.</jats:p>

Topics

• perovskite
• impedance spectroscopy
• surface
• photoluminescence
• aluminium
• laser emission spectroscopy
• Silicon
• tin
• Indium