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Modulating defect density of NiO hole transport layer via tuning interfacial oxygen stoichiometry in perovskite solar cells

Modulating defect density of NiO hole transport layer via tuning interfacial oxygen stoichiometry in perovskite solar cells

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HAIDER, Muhammad Irfan, Azhar FAKHARUDDIN, Safeer AHMED, Muhammad SULTAN, Lukas SCHMIDT-MENDE, 2022. Modulating defect density of NiO hole transport layer via tuning interfacial oxygen stoichiometry in perovskite solar cells. In: Solar Energy. Elsevier. 233, pp. 326-336. ISSN 0038-092X. eISSN 1471-1257. Available under: doi: 10.1016/j.solener.2022.01.023

@article{Haider2022Modul-56682, title={Modulating defect density of NiO hole transport layer via tuning interfacial oxygen stoichiometry in perovskite solar cells}, year={2022}, doi={10.1016/j.solener.2022.01.023}, volume={233}, issn={0038-092X}, journal={Solar Energy}, pages={326--336}, author={Haider, Muhammad Irfan and Fakharuddin, Azhar and Ahmed, Safeer and Sultan, Muhammad and Schmidt-Mende, Lukas} }

Haider, Muhammad Irfan 2022-02-25T08:17:43Z Schmidt-Mende, Lukas Schmidt-Mende, Lukas Sultan, Muhammad Ahmed, Safeer 2022 The role of oxygen stoichiometry towards the surface properties of NiOx and its influence over perovskite film morphology, band alignment and charge extraction at NiO<sub>x</sub>/MAPbI<sub>3</sub> interface in inverted perovskite solar cells (PSCs) is analyzed. The oxygen stoichiometry was systematically tuned via thermal treatment of NiOx film in oxygen-rich (o- NiOx) and oxygen-deficient (r- NiOx) atmospheres. These processing conditions impact the defect density and conductivity of NiOx films and thus on the rates of surface recombination, the power conversion efficiency (PCE) and the device stability. We note that the PSCs with r- NiOx show a 20% improvement in PCE in comparison to o- NiOx counterparts. Room-temperature stability measurements for a period of several months demonstrates that the r- NiO<sub>x</sub>/MAPbI<sub>3</sub> interface prolongs the device stability and retains 95% of its initial PCE, whereas a higher defect density due to the presence of excess oxygen at the o- NiOx/perovskite interface leads to faster degradation. Fakharuddin, Azhar Haider, Muhammad Irfan Sultan, Muhammad Modulating defect density of NiO hole transport layer via tuning interfacial oxygen stoichiometry in perovskite solar cells terms-of-use eng Ahmed, Safeer Fakharuddin, Azhar 2022-02-25T08:17:43Z

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