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000890112 245__ $$aUltrathin polymeric films for interfacial passivation in wide band-gap perovskite solar cells
000890112 260__ $$a[London]$$bMacmillan Publishers Limited, part of Springer Nature$$c2020
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000890112 520__ $$aWide band-gap perovskite solar cells have the potential for a relatively high output voltage and resilience in a degradation-inducing environment. Investigating the reasons why high voltages with adequate output power have not been realized yet is an underexplored part in perovskite research although it is of paramount interest for multijunction solar cells. One reason is interfacial carrier recombination that leads to reduced carrier lifetimes and voltage loss. To further improve the Voc of methylammonium lead tri-bromide (MAPbBr3), that has a band-gap of 2.3 eV, interface passivation technique is an important strategy. Here we demonstrate two ultrathin passivation layers consisting of PCBM and PMMA, that can effectively passivate defects at the TiO2/perovskite and perovskite/spiro-OMeTAD interfaces, respectively. In addition, perovskite crystallization was investigated with the established anti-solvent method and the novel flash infrared annealing (FIRA) with and without passivation layers. These modifications significantly suppress interfacial recombination providing a pathway for improved VOC’s from 1.27 to 1.41 V using anti solvent and from 1.12 to 1.36 V using FIRA. Furthermore, we obtained more stable devices through passivation after 140 h where the device retained 70% of the initial performance value.
000890112 536__ $$0G:(DE-HGF)POF3-121$$a121 - Solar cells of the next generation (POF3-121)$$cPOF3-121$$fPOF III$$x0
000890112 536__ $$0Helmholtz Young Investigators Group: Key Technologies$$aHelmholtz Young Investigators Group (Helmholtz Young Investigators Group: Key Technologies)$$cHelmholtz Young Investigators Group: Key Technologies$$x1
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000890112 7001_ $$0P:(DE-HGF)0$$aOchoa-Martinez, Efrain$$b1
000890112 7001_ $$0P:(DE-HGF)0$$aAlonso, Sandy Sanchez$$b2
000890112 7001_ $$0P:(DE-HGF)0$$aSteiner, Ullrich$$b3
000890112 7001_ $$0P:(DE-Juel1)180101$$aSaliba, Michael$$b4$$eCorresponding author
000890112 773__ $$0PERI:(DE-600)2615211-3$$a10.1038/s41598-020-79348-1$$gVol. 10, no. 1, p. 22260$$n1$$p22260$$tScientific reports$$v10$$x2045-2322$$y2020
000890112 8564_ $$uhttps://juser.fz-juelich.de/record/890112/files/s41598-020-79348-1.pdf$$yOpenAccess
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