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Stabilizing Perovskite Precursor by Synergy of Functional Groups for NiOx‐Based Inverted Solar Cells with 23.5 % Efficiency

Abstract : Perovskite solar cells suffer from poor reproducibility due to the degradation of perovskite precursor solution. Herein, we report an effective precursor stabilization strategy via incorporating 3-hydrazinobenzoic acid (3-HBA) containing carboxyl (-COOH) and hydrazine (-NHNH2) functional groups stabilizer. The oxidation of I-, deprotonation of organic cations and amine-cation reaction are main causes of the degradation of mixed organic cation perovskite precursor solution. The-NHNH2 can reduce I2 defects back to Iand thus suppress the oxidation of I-, while the H + generated by-COOH can inhibit the deprotonation of organic cations and subsequent amine-cation reaction. The above degradation reactions are simultaneously inhibited by the synergy of functional groups. 2 The inverted device achieves an efficiency of 23.5% (certified efficiency of 23.3%) with excellent operational stability, retaining 94% of the initial efficiency after maximum power point tracking for 601 hours.
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https://hal-cnrs.archives-ouvertes.fr/hal-03760295
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Submitted on : Thursday, August 25, 2022 - 10:12:06 AM
Last modification on : Friday, August 26, 2022 - 3:48:48 AM

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Mengjia Li, Haiyun Li, Qixin Zhuang, Dongmei He, Baibai Liu, et al.. Stabilizing Perovskite Precursor by Synergy of Functional Groups for NiOx‐Based Inverted Solar Cells with 23.5 % Efficiency. Angewandte Chemie International Edition, Wiley-VCH Verlag, 2022, 61 (35), pp.e202206914. ⟨10.1002/anie.202206914⟩. ⟨hal-03760295⟩

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