Electrical and noise characterization of perovskite solar cells at different temperatures

Organic perovskite solar cells are an important emerging technology with the capability to compete with Silicon and other solar cells. Here we perform I(V) and noise characterization of the solar cells with the composition (𝐶𝐻₃𝑁𝐻₃𝑃𝑏𝐼₃) in the temperature range T=100-310 K and at different levels of light intensity. The studied solar cells display very strong memory effect, that is the current via devices depended strongly on the past history of the light exposure and voltage variation. The memory effect becomes progressively stronger at lower temperatures. To mediate this effect prolonged light exposure (30-60 min) was performed before the start of each I(V) run. We found that the I(V) characteristics display clear deviation from the classical exponential variations. Nevertheless, the gross characteristics were consistent with the “text-book” behavior: the open circuit voltage was roughly independent of light intensity and closed-circuit current was proportional to the light intensity. We will also present and discuss the noise spectra of the devices.