Perovskite solar cells have rapidly emerged as promising low-cost photovoltaic technology with efficiencies exceeding 20%. This technology is not commercially available yet, mainly as a result of scalability and stability problems [1]. The electrodeposition of PEDOT (Poly(3,4-ethylenedioxythiophene)) is an interesting alternative to the traditional spin coated poly(3,4-ethylenedioxythiophene):polystyrene sulfonate or PEDOT:PSS (SC-PEDOT:PSS) used as hole transporting material (HTM) in perovskite solar cells. The electrochemically deposited PEDOT (EC-PEDOT) does not generate much waste and it can be applied on substrates of different size and geometry. In addition, the electrochemical synthesis allows to obtain coatings with adjusted properties and great reproducibility [2, 3]. In this work we tuned the oxidation level of EC-PEDOT by adding NaCl to the synthesis solution and compared these materials against SC-PEDOT:PSS on inverted perovskite solar cells [4].

Electropolymerized PEDOT for inverted perovskite solar cells with enhanced stability

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