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

So Min Park, Mingyang Wei, Nikolaos Lempesis, Wenjin Yu, Tareq Hossain, Lorenzo Agosta, Virginia Carnevali, Harindi R. Atapattu, Peter Serles, Felix T. Eickemeyer, Heejong Shin, Maral Vafaie, Deokjae Choi, Kasra Darabi, Eui Dae Jung, Yi Yang, Da Bin Kim, Shaik M. Zakeeruddin, Bin Chen, Aram AmassianTobin Filleter, Mercouri G. Kanatzidis, Kenneth R. Graham, Lixin Xiao, Ursula Rothlisberger, Michael Grätzel*, Edward H. Sargent*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Scopus citations


Inverted perovskite solar cells (PSCs) promise enhanced operating stability compared to their normal-structure counterparts1–3. To improve efficiency further, it is crucial to combine effective light management with low interfacial losses4,5. Here we develop a conformal self-assembled monolayer (SAM) as the hole-selective contact on light-managing textured substrates. Molecular dynamics simulations indicate that 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, and thereby minimizing interfacial recombination and improving electronic structures. We report a laboratory-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 more than 1,000 h of maximum power point tracking under 1 sun illumination. This represents one of the most stable PSCs subjected to accelerated ageing: achieved with a PCE surpassing 24%. The engineering of phosphonic acid adsorption on textured substrates offers a promising avenue for efficient and stable PSCs. It is also anticipated to benefit other optoelectronic devices that require light management.

Original languageEnglish (US)
Pages (from-to)289-294
Number of pages6
Issue number7991
StatePublished - Dec 14 2023

ASJC Scopus subject areas

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

    Park, S. M. (Contributor), Wei, M. (Contributor), Lempesis, N. (Contributor), Yu, W. (Contributor), Hossain, T. (Contributor), Agosta, L. (Contributor), Carnevali, V. (Contributor), Atapattu, H. R. (Contributor), Serles, P. (Contributor), Eickemeyer, F. T. (Contributor), Vafaie, M. (Contributor), Darabi, K. (Contributor), Jung, E. D. (Contributor), Yang, Y. (Contributor), Kim, D. B. (Contributor), Zakeeruddin, S. M. (Contributor), Chen, B. (Contributor), Amassian, A. (Contributor), Filleter, T. (Contributor), Kanatzidis, M. (Contributor), Graham, K. R. (Contributor), Xiao, L. (Contributor), Rothlisberger, U. (Contributor), Grätzel, M. (Contributor) & Sargent, E. H. (Contributor), ZENODO, Sep 29 2023


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