In<sub>2</sub>O<sub>3</sub>:H-Based Hole-Transport-Layer-Free Tin/Lead Perovskite Solar Cells for Efficient Four-Terminal All-Perovskite Tandem Solar Cells
Somayeh Moghadamzadeh, Ihteaz M. Hossain, Moritz Loy, David B. Ritzer, Hang Hu, Dirk Hauschild, Adrian Mertens, Jan‐Philipp Becker, Amir A. Haghighirad, Erik Ahlswede, L. Weinhardt, Uli Lemmer, Bahram Abdollahi Nejand, Ulrich W. Paetzold
Abstract
:H (IO:H) electrodes instead of the commonly used indium tin oxide (ITO). Removing HTL reduces parasitic absorption loss in shorter wavelengths without compromising the photovoltaic performance. IO:H, with an ultra-low near-infrared optical loss and a high charge carrier mobility, results in a remarkable increase in the photocurrent of the semitransparent top and (HTL-free) NBG bottom perovskite solar cells when substituted for ITO. As a result, an IO:H-based four-terminal all-perovskite tandem solar cell (4T all-PTSCs) with a power conversion efficiency (PCE) as high as 24.8% is demonstrated, outperforming ITO-based 4T all-PTSCs with PCE up to 23.3%.