EPFL - École Polytechnique Fédérale de Lausanne
Published September 29, 2023 | Version v2
Dataset Open

Low-loss contacts on textured substrates for inverted perovskite solar cells

Description

Inverted perovskite solar cells (PSCs) promise enhanced operating stability compared to their normal-structure counterparts. To improve efficiency further, it is crucial to combine effective light management with low interfacial losses. Here we develop a conformal self-assembled monolayer as the hole-selective contact on light-managing textured substrates. Molecular dynamics simulations indicate cluster formation during phosphonic acid adsorption leads to incomplete SAM coverage. We devise a co-adsorbent strategy that disassembles high-order clusters, thus homogenizing the distribution of phosphonic acid molecules, thereby minimizing interfacial recombination and improving electronic structures. We report a lab-measured power-conversion efficiency (PCE) of 25.3% and a certified quasi-steady-state PCE of 24.8% for inverted PSCs, with a photocurrent approaching 95% of the Shockley-Queisser maximum. An encapsulated device having a PCE of 24.6% at room temperature retains 95% of its peak performance when stressed at 65°C and 50% relative humidity following > 1000 hours of maximum power point tracking under 1-sun illumination. 

Files

Files (614.6 MB)

Name Size
md5:a44933324d97d7586d42397973fadc38
220.8 MB Download
md5:5acae66151e48da1c8faa5cadf92923b
393.7 MB Download
md5:e54b1d23e9f81b0287cb1c12a5ace845
121.7 kB Download
md5:fc4e0291e22d50ca49d4e75576c923bb
404 Bytes Download

Additional details

Related works

Is supplement to
Journal article: 10.1038/s41586-023-06745-7 (DOI)