Jacobs, Daniel A.; Wu, Yiliang; Shen, Heping; Barugkin, Chog; Beck, Fiona J.; White, Thomas P.; Weber, Klaus; Catchpole, Kylie R.
The issue of hysteresis in perovskite solar cells has now been convincingly linked to the presence of mobile ions within the perovskite layer. Here we test the limits of the ionic theory by attempting to account for a number of exotic characterization results using a detailed numerical device model that incorporates ionic charge accumulation at the perovskite interfaces. Our experimental observations include a temporary enhancement in open-circuit voltage following prolonged periods of negative...[Show more]
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