Humidity Sensing Properties of Organometallic Perovskite CH 3 NH 3 PbI 3

Abstract It is known that the photovoltaic properties of organic perovskite based solar cells decline at high humidity that is one of the perovskite solar cells disadvantages. We investigated the effect of humidity on the perovskite CH 3 NH 3 PbI 3 conductivity that can be applied to creation of cheap and effective humidity sensors. The measurements have shown that perovskite CH 3 NH 3 PbI 3 has a competitively high sensitivity to humidity. The mechanisms that lead to a change in the perovskite conductivity in a humid environment are proposed.