Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics 2018 (AP-HOPV18)
DOI: https://doi.org/10.29363/nanoge.ap-hopv.2018.018
Publication date: 27th October 2017
Organic–inorganic metal halide perovskite solar cells (PSCs) have recently attracted enormous attention because their power conversion efficiency (PCE) has been drastically increased from 3.8% when first reported1 to 22.1%2 within a few years only. The striking advances rapid in the photovoltaic performance of PSCs is mainly attributable to the development of perovskite photoactive layer materials with superior properties3-6. However, a serious bottleneck for further development of PSCs has been encountered, since the quality of perovskite layer quite effects the photovoltaic performance of PSCs via carrier recombination, interface connection, anti-humidity/oxgen, and so on. Therefore, exploring effective approaches to engineering the interfaces of perovskite layers is strongly required for further improvement of the photovoltaic performance and stability of PSCs, such as self-induced passivation and solvent treatments.
In this work, we investigated the enhancement of photovoltaic performance of PSCs by incorporating a poly(methyl methacrylate) (PMMA) layer on the perovskite (CH3NH3PbI3) surface. The current-voltage (J-V) PCE of PSCs have been significantly improved from 16.8 to 20.4% in reverse scan condition. The stabilized power output PCE and stability of PMMA incorporated PSCs also have been much improved from 14.9 to 19.9%. These results are much better than our previously obtained values7 and highest value in CH3NH3PbI3-PSCs. Moreover, the detailed working mechanism of PMMA incorporated in PSCs has been studied via photoluminescence and impedance spectroscopy.
References
[1] A. Kojima, et al. J. Am. Chem. Soc. 2009, 131, 6050-6051.
[2] NREL chart, http://www.nrel.gov/ncpv/images/efficiency_chart.jpg, Accessed 13.03.2016, 2016.
[3] G. Xing et al. Science 2013, 342, 344-347.
[4] Q. Lin et al. Nat. Photonics 2015, 9, 106-112.
[5] S. D. Strank et al. Science 2013, 342, 341-344.
[6] C. Wehrenfennig et al. Adv. Mater. 2013, 26, 1584-1589.
[7] F. Wang et al. J. Phys. Chem. C 2017, 121, 1562-1568.
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