Brief Overview on the Development of Dye-Sensitized and Perovskite Solar Cells
Anders Hagfeldt a
a Department of Chemistry – Ångström Laboratory, Uppsala University, Uppsala, Sweden
Invited Speaker, Anders Hagfeldt, presentation 156
Publication date: 6th February 2024

In 1991 a paradigm shift of photovoltaics occurred with the publication of a high efficiency dye-sensitized solar cells (DSSC) utilizing a high surface area nanostructured photoelectrode [1]. In my talk I will briefly overview the development of DSSCs to the present state-of-the art. The development of new photo-sensitizers for DSSC led to the breakthrough of perovskite solar cells (PSC) in 2012 [2, 3]. With efficiencies at present above 26% and close to 34% for PSC/Si tandem devices, PSC is the frontrunner of emerging photovoltaic technologies.

My talk will focus on the longterm stability of PSCs as the key challenge for future industrialization. In particular, I will discuss different types of molecules that synergistically improve both power conversion efficiency and stability. For example, we have developed a class of molecules to post-treat formamidinium lead iodide (FAPbI3) perovskite films, which remains in black-phase after 2 years ageing under ambient condition without encapsulation. The treated perovskite solar cell devices show high efficiencies with less than 1% performance loss after more than 4500 h at maximum power point tracking, yielding a theoretical T80 of over 9 years under continuous 1-sun illumination [4].

[1] B. O´Regan and M. Grätzel, Nature, 353, 737 (1991).

[2] H.-S. Kim, et al. Sci. Rep., | 2 : 591 | (2012).

[3] M. M. Lee, et al. Science, 338, 643 (2012).

[4] J. Suo et al. Nature Energy,

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