Highly Luminescent and Stable 2D/3D Octadecylammonium/Formamidinium Lead Bromide Perovskite Films

Highly Luminescent and Stable 2D/3D Octadecylammonium/Formamidinium Lead Bromide Perovskite Films

We developed a facile approach to fabricate highly luminescent and stable quasi-2D/3D (ODA)2FA n–1Pb n Br3n+1/FAPbBr3 (ODA: octadecylammonium; FA: formamidinium) perovskite films. Trace amounts of octadecylamine dissolved in toluene used as an antisolvent were partially protonated by FAPbBr3 and int...

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Veröffentlicht in:Journal of physical chemistry. C 2021-08, Vol.125 (31), p.17501-17508
Hauptverfasser: Duan, Zonghui, Wang, Shixun, Qi, Jinsong, Portniagin, Arsenii S, Döring, Aaron, Kershaw, Stephen V, Rogach, Andrey L
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container_end_page 17508
container_issue 31
container_start_page 17501
container_title Journal of physical chemistry. C
container_volume 125
creator Duan, Zonghui
Wang, Shixun
Qi, Jinsong
Portniagin, Arsenii S
Döring, Aaron
Kershaw, Stephen V
Rogach, Andrey L
description We developed a facile approach to fabricate highly luminescent and stable quasi-2D/3D (ODA)2FA n–1Pb n Br3n+1/FAPbBr3 (ODA: octadecylammonium; FA: formamidinium) perovskite films. Trace amounts of octadecylamine dissolved in toluene used as an antisolvent were partially protonated by FAPbBr3 and interacted with [PbBr6]4– octahedral layers, forming quasi-2D perovskites. Moreover, octadecylamine uniformly and densely covered the perovskite surface rendering it hydrophobic and prevented penetration of water, making these perovskite films stable and strongly luminescent in water for several tens of minutes without any encapsulation. Adjusting the concentration of octadecylamine, we were able to produce perovskite films with an exceptionally high photoluminescence quantum yield (PL QY) of 91%, which was ascribed to the efficient energy funneling from the 2D to the 3D perovskite phase and the passivation action of the organic additive.
doi_str_mv 10.1021/acs.jpcc.1c04881
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title Highly Luminescent and Stable 2D/3D Octadecylammonium/Formamidinium Lead Bromide Perovskite Films
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