%0 Journal Article %1 yang2018efficiency %A Yang, Dong %A Yang, Ruixia %A Wang, Kai %A Wu, Congcong %A Zhu, Xuejie %A Feng, Jiangshan %A Ren, Xiaodong %A Fang, Guojia %A Priya, Shashank %A Liu, Shengzhong (Frank) %D 2018 %J Nature Communications %K high_PCE perovskite planar stability %N 1 %P 3239-- %R 10.1038/s41467-018-05760-x %T High efficiency planar-type perovskite solar cells with negligible hysteresis using EDTA-complexed SnO2 %U https://doi.org/10.1038/s41467-018-05760-x %V 9 %X Even though the mesoporous-type perovskite solar cell (PSC) is known for high efficiency, its planar-type counterpart exhibits lower efficiency and hysteretic response. Herein, we report success in suppressing hysteresis and record efficiency for planar-type devices using EDTA-complexed tin oxide (SnO2) electron-transport layer. The Fermi level of EDTA-complexed SnO2 is better matched with the conduction band of perovskite, leading to high open-circuit voltage. Its electron mobility is about three times larger than that of the SnO2. The record power conversion efficiency of planar-type PSCs with EDTA-complexed SnO2 increases to 21.60% (certified at 21.52% by Newport) with negligible hysteresis. Meanwhile, the low-temperature processed EDTA-complexed SnO2 enables 18.28% efficiency for a flexible device. Moreover, the unsealed PSCs with EDTA-complexed SnO2 degrade only by 8% exposed in an ambient atmosphere after 2880 h, and only by 14% after 120 h under irradiation at 100 mW cm−2.

@article{yang2018efficiency, abstract = {Even though the mesoporous-type perovskite solar cell (PSC) is known for high efficiency, its planar-type counterpart exhibits lower efficiency and hysteretic response. Herein, we report success in suppressing hysteresis and record efficiency for planar-type devices using EDTA-complexed tin oxide (SnO2) electron-transport layer. The Fermi level of EDTA-complexed SnO2 is better matched with the conduction band of perovskite, leading to high open-circuit voltage. Its electron mobility is about three times larger than that of the SnO2. The record power conversion efficiency of planar-type PSCs with EDTA-complexed SnO2 increases to 21.60% (certified at 21.52% by Newport) with negligible hysteresis. Meanwhile, the low-temperature processed EDTA-complexed SnO2 enables 18.28% efficiency for a flexible device. Moreover, the unsealed PSCs with EDTA-complexed SnO2 degrade only by 8% exposed in an ambient atmosphere after 2880 h, and only by 14% after 120 h under irradiation at 100 mW cm−2.}, added-at = {2018-09-05T13:40:50.000+0200}, author = {Yang, Dong and Yang, Ruixia and Wang, Kai and Wu, Congcong and Zhu, Xuejie and Feng, Jiangshan and Ren, Xiaodong and Fang, Guojia and Priya, Shashank and Liu, Shengzhong (Frank)}, biburl = {https://www.bibsonomy.org/bibtex/293c577b4ffa988f1cd666043ff0b6dda/bretschneider_m}, doi = {10.1038/s41467-018-05760-x}, interhash = {88e3dc3a6c8c32de81a749e0780c5870}, intrahash = {93c577b4ffa988f1cd666043ff0b6dda}, issn = {20411723}, journal = {Nature Communications}, keywords = {high_PCE perovskite planar stability}, number = 1, pages = {3239--}, refid = {Yang2018}, timestamp = {2018-09-05T13:40:50.000+0200}, title = {High efficiency planar-type perovskite solar cells with negligible hysteresis using EDTA-complexed SnO2}, url = {https://doi.org/10.1038/s41467-018-05760-x}, volume = 9, year = 2018 }