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Improving the Performance of Inverted Formamidinium Tin Iodide Perovskite Solar Cells by Reducing the Energy-Level Mismatch AITranslate

Xiao Liu; Yanbo Wang; Fengxian Xie; Xudong Yang; Liyuan Han;
Shanghai Jiao Tong University; Shanghai Jiao Tong University; National Institute for Materials Science; Shanghai Jiao Tong University; Shanghai Jiao Tong University
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Publisher: ACS
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Abstract AITranslate

A new hole-transport layer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate (PEDOT:PSS) with intercalated polyethylene glycol (PEG), was introduced into Pb-free inverted formamidinium tin triiodide (FASnI3) perovskite solar cells to reduce the energy-level mismatch between FASnI3 and PEDOT:PSS. Intercalation of PEG into the PEDOT:PSS enhanced the power conversion efficiency from 2.01 to 5.12% in the forward scan and resulted in high reproducibility. The device based on PEG-PEDOT:PSS showed a reduced hysteresis and a stabilized efficiency of 4.91%. Finally, the devices with the new hole-transport layer retained more than 90 and 95% of their initial power conversion efficiencies upon storage in, respectively, an ambient environment for 4 h and a N2 environment for 30 days. These findings suggest that this new material will facilitate the development of environmentally friendly Pb-free perovskite solar cells for real-world applications.

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DOI：https://doi.org/10.1021/acsenergylett.8b00383

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Citation Information:

A new hole-transport layer, poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate (PEDOT:PSS) with intercalated polyethylene glycol (PEG), was introduced into Pb-free inverted formamidinium tin triiodide (FASnI3) perovskite solar cells to reduce the energy-level mismatch between FASnI3 and PEDOT:PSS. Intercalation of PEG into the PEDOT:PSS enhanced the power conversion efficiency from 2.01 to 5.12% in the forward scan and resulted in high reproducibility. The device based on PEG-PEDOT:PSS showed a reduced hysteresis and a stabilized efficiency of 4.91%. Finally, the devices with the new hole-transport layer retained more than 90 and 95% of their initial power conversion efficiencies upon storage in, respectively, an ambient environment for 4 h and a N2 environment for 30 days. These findings suggest that this new material will facilitate the development of environmentally friendly Pb-free perovskite solar cells for real-world applications.

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GB/T 7714-2015 [1] Xiao Liu, Yanbo Wang, Fengxian Xie, et al. ACS Energy Letters, 2018(3). DOI:10.1021/acsenergylett.8b00383.
MLA [1] Xiao Liu, et al., ACS Energy Letters, no. 3, 2018, https://doi.org/10.1021/acsenergylett.8b00383.
APA [1] Xiao Liu, Yanbo Wang, Fengxian Xie, Xudong Yang, & Liyuan Han. (2018). ACS Energy Letters(3). https://doi.org/10.1021/acsenergylett.8b00383
IEEE [1] Xiao Liu, Yanbo Wang, Fengxian Xie, Xudong Yang, and Liyuan Han, ACS Energy Letters, no. 3, 2018, doi: 10.1021/acsenergylett.8b00383.