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• W2804097375 abstract "Abstract Perovskite solar cells based on series of inorganic cesium lead bromide and iodide mixture, CsPbBr 3- x I x , where x varies between 0, 0.1, 0.2, and 0.3 molar ratio were synthesized by two step-sequential deposition at ambient condition to design the variations of wide band gap light absorbers. A device with high overall photoconversion efficiency of 3.98 % was obtained when small amount of iodide (CsPbBr 2.9 I 0.1 ) was used as the perovskite and spiro -OMeTAD as the hole transport material (HTM). We investigated the origin of variation in open circuit voltage, V oc which was shown to be mainly dependent on two factors, which are the band gap of the perovskite and the work function of the HTM. An increment in V oc was observed for the device with larger perovskite band gap, while keeping the electron and hole extraction contacts the same. Besides, the usage of bilayer P3HT/MoO 3 with deeper HOMO level as HTM instead of spiro -OMeTAD, thus increased the V oc from 1.16 V to 1.3 V for CsPbBr 3 solar cell, although the photocurrent is lowered due to charge extraction issues. The stability studies confirmed that the addition of small amount of iodide into the CsPbBr 3 is necessarily to stabilize the cell performance over time." @default.
• W2804097375 created "2018-06-01" @default.
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• W2804097375 date "2018-02-06" @default.
• W2804097375 modified "2023-09-29" @default.
• W2804097375 title "Tunable Open Circuit Voltage by Engineering Inorganic Cesium Lead Bromide/Iodide Perovskite Solar Cells" @default.
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• W2804097375 doi "https://doi.org/10.1038/s41598-018-20228-0" @default.
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