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Abstract
Poor stability under humid environment is one of the key issues of inorganic–organic hybrid perovskite materials, which limits the transformation of perovskite optoelectronic devices from laboratory to industry. In this paper, a dense ZnO electron transport layer is fabricated directly on top of perovskite films by pulsed laser deposition (PLD) as the first line of defence against the penetration of H2O into perovskite, which shows excellent moisture resistance when compared with conventional organic and oxide nanoparticle counterparts. Smooth, dense and highly oriented crystalline ZnO films are obtained by deposition at near-room-temperature. And importantly, in the meantime, the structure and morphology of underlying perovskite layer are preserved.
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