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izvor podataka: crosbi

Phase control for quasi-2D blue emitters by spacer cation engineering (CROSBI ID 278564)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Tam, Ho Won ; Leung, Tik Lun ; Sun, Wenting ; Liu, Fangzhou ; Ma, Chao ; Kam, Chun Sing ; Lončarić, Ivor ; Grisanti, Luca ; Ovčar, Juraj ; Skoko, Željko et al. Phase control for quasi-2D blue emitters by spacer cation engineering // Journal of Materials Chemistry C, 8 (2020), 11052-11060. doi: 10.1039/d0tc01631d

Podaci o odgovornosti

Tam, Ho Won ; Leung, Tik Lun ; Sun, Wenting ; Liu, Fangzhou ; Ma, Chao ; Kam, Chun Sing ; Lončarić, Ivor ; Grisanti, Luca ; Ovčar, Juraj ; Skoko, Željko ; Popović, Jasminka ; Đurisic, Aleksandra

engleski

Phase control for quasi-2D blue emitters by spacer cation engineering

Effect of the alkylammonium tail length in phenyl- alkyl spacer cations in quasi-2D Ruddlesden-Popper perovskites on the phase distribution in low n films (n=2 stoichiometry) is investigated. The increase in the alkyl chain length suppresses the formation of n=1 phase (and consequently higher n phases), which is attributed to the change in the packing arrangement of spacer cations from parallel (one and two carbon atoms alkyl chain) to non- parallel (3 carbon atoms alkyl chain). Single blue emission peak corresponding to n=3 phase (466 nm) and n=2 phase (436 nm) is obtained in the PL spectra of propylphenylammonium quasi-2D perovskites with methylammonium (MA) and formamidinium (FA) cations, respectively. The same trends in phase distribution, namely the reduction in the proportion of n=1 phase with increasing alkyl chain length are observed for both MA- and FA- based perovskites. However, FA- based samples exhibit higher crystallinity but worsened morphology (more pinholes) and less efficient funneling compared to MA-based samples. Consequently, efficient sky-blue LEDs with the highest EQE of 3.35% are obtained for PPA2MAPb2Br7 perovskite.

Ruddlesden-Popper perovskites

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Podaci o izdanju

8

2020.

11052-11060

objavljeno

2050-7526

2050-7534

10.1039/d0tc01631d

Povezanost rada

Fizika, Kemija

Poveznice
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