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Surface modification of CsPbI<sub>2</sub>Br for improved performance of inorganic perovskite solar cells

Surface modification of CsPbI2Br for improved performance of inorganic perovskite solar cells

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FATIMA, Kalsoom, Muhammad Irfan HAIDER, Amna BASHIR, Samina QAMAR, Akbar Ali QURESHI, Zareen AKHTER, Muhammad SULTAN, 2022. Surface modification of CsPbI2Br for improved performance of inorganic perovskite solar cells. In: Physica E: Low-dimensional Systems and Nanostructures. Elsevier. 142, 115265. ISSN 1386-9477. eISSN 1873-1759. Available under: doi: 10.1016/j.physe.2022.115265

@article{Fatima2022Surfa-57705, title={Surface modification of CsPbI2Br for improved performance of inorganic perovskite solar cells}, year={2022}, doi={10.1016/j.physe.2022.115265}, volume={142}, issn={1386-9477}, journal={Physica E: Low-dimensional Systems and Nanostructures}, author={Fatima, Kalsoom and Haider, Muhammad Irfan and Bashir, Amna and Qamar, Samina and Qureshi, Akbar Ali and Akhter, Zareen and Sultan, Muhammad}, note={Article Number: 115265} }

2022 Fatima, Kalsoom Bashir, Amna Sultan, Muhammad Qureshi, Akbar Ali 2022-05-31T10:00:06Z Akhter, Zareen Akhter, Zareen Sultan, Muhammad Surface modification of CsPbI<sub>2</sub>Br for improved performance of inorganic perovskite solar cells Fatima, Kalsoom Bashir, Amna Degradation of halide perovskite materials upon ambient exposure is one of the major challenge for their applications. Inorganic perovskite materials (such as CsPbI<sub>2</sub>Br) have emerged as potential candidate for stable perovskite optoelectronic applications in recent years owing to their appropriate bandgap and high thermal stability. However, the fabrication of high quality CsPbI<sub>2</sub>Br absorber layer is the main challenge to achieve highly efficient perovskite solar cells (PSCs). Herein, we report a strategy for the surface modification of CsPbI<sub>2</sub>Br layer via the treatment with isopropanol. The modified CsPbI<sub>2</sub>Br absorber layer has energetically more favorable band alignment with the C<sub>60</sub> which facilitates the efficient charge transfer and mitigate the energy loss at CsPbI<sub>2</sub>Br/C<sub>60</sub> interfaces. The inorganic PSCs with the architecture of ITO/NiO<sub>x</sub>/CsPbI<sub>2</sub>Br/C<sub>60</sub>/Cu showed open-circuit voltage (V<sub>OC</sub>) of 1.13 V and 30% improvement in the power conversion efficiency (PCE). Moreover, the devices exhibit less hysteresis index and excellent stability with no sign of degradation for 160 h. Haider, Muhammad Irfan Qureshi, Akbar Ali Qamar, Samina 2022-05-31T10:00:06Z eng Qamar, Samina Haider, Muhammad Irfan

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