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Humidity versus photo-stability of metal halide perovskite films in a polymer matrix

Humidity versus photo-stability of metal halide perovskite films in a polymer matrix

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Prüfsumme: MD5:f404b9498b85b060803da98cd51c40b9

MANSHOR, Nurul Ain, Qamar WALI, Ka Kan WONG, Saifful Kamaluddin MUZAKIR, Azhar FAKHARUDDIN, Lukas SCHMIDT-MENDE, Rajan JOSE, 2016. Humidity versus photo-stability of metal halide perovskite films in a polymer matrix. In: Physical Chemistry Chemical Physics. 18(31), pp. 21629-21639. ISSN 1463-9076. eISSN 1463-9084. Available under: doi: 10.1039/C6CP03600G

@article{Manshor2016Humid-35387, title={Humidity versus photo-stability of metal halide perovskite films in a polymer matrix}, year={2016}, doi={10.1039/C6CP03600G}, number={31}, volume={18}, issn={1463-9076}, journal={Physical Chemistry Chemical Physics}, pages={21629--21639}, author={Manshor, Nurul Ain and Wali, Qamar and Wong, Ka Kan and Muzakir, Saifful Kamaluddin and Fakharuddin, Azhar and Schmidt-Mende, Lukas and Jose, Rajan} }

2016 Humidity versus photo-stability of metal halide perovskite films in a polymer matrix Manshor, Nurul Ain 2016-09-22T14:34:56Z Wali, Qamar Wali, Qamar eng Fakharuddin, Azhar Jose, Rajan 2016-09-22T14:34:56Z Wong, Ka Kan Schmidt-Mende, Lukas Muzakir, Saifful Kamaluddin Schmidt-Mende, Lukas Manshor, Nurul Ain Muzakir, Saifful Kamaluddin Wong, Ka Kan Fakharuddin, Azhar Despite the high efficiency of over 21% reported for emerging thin film perovskite solar cells, one of the key issues prior to their commercial deployment is to attain their long term stability under ambient and outdoor conditions. The instability in perovskite is widely conceived to be humidity induced due to the water solubility of its initial precursors, which leads to decomposition of the perovskite crystal structure; however, we note that humidity alone is not the major degradation factor and it is rather the photon dose in combination with humidity exposure that triggers the instability. In our experiment, which is designed to decouple the effect of humidity and light on perovskite degradation, we investigate the shelf-lifetime of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> films in the dark and under illumination under high humidity conditions (Rel. H. > 70%). We note minor degradation in perovskite films stored in a humid dark environment whereas upon exposure to light, the films undergo drastic degradation, primarily owing to the reactive TiO<sub>2</sub>/perovskite interface and also the surface defects of TiO<sub>2</sub>. To enhance its air-stability, we incorporate CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> perovskite in a polymer (poly-vinylpyrrolidone, PVP) matrix which retained its optical and structural characteristics in the dark for ∼2000 h and ∼800 h in room light soaking, significantly higher than a pristine perovskite film, which degraded completely in 600 h in the dark and in less than 100 h when exposed to light. We attribute the superior stability of PVP incorporated perovskite films to the improved structural stability of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> and also to the improved TiO<sub>2</sub>/perovskite interface upon incorporating a polymer matrix. Charge injection from the polymer embedded perovskite films has also been confirmed by fabricating solar cells using them, thereby providing a promising future research pathway for stable and efficient perovskite solar cells. Jose, Rajan

Dateiabrufe seit 22.09.2016 (Informationen über die Zugriffsstatistik)

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