Dion-Jacobson Phase 2D Layered Perovskites for Solar Cells with Ultrahigh Stability

Ahmad, Sajjad; Fu, Ping; Yu, Shuwen; Yang, Qing; Li, Xuan; Wang, Xuchao; Wang, Xiuli; Guo, Xuhong; Li, Can

doi:10.1016/j.joule.2019.02.011

Cited by 52 publications

(59 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In contrast, no significant change was observed for APSA-treated MAMP film. It has been proven that DJ-phase quasi-2D perovskites typically exhibit stronger rigidity and interlayer connection than Ruddlesden-Popper-phase ones 39 .…”

Section: Crystallization Kinetics Regulation Corresponding Quasi-2dmentioning

confidence: 99%

Reduced-dimensional perovskite photovoltaics with homogeneous energy landscape

et al. 2020

View full text Add to dashboard Cite

Reduced-dimensional (quasi-2D) perovskite materials are widely applied for perovskite photovoltaics due to their remarkable environmental stability. However, their device performance still lags far behind traditional three dimensional perovskites, particularly high open circuit voltage (V oc) loss. Here, inhomogeneous energy landscape is pointed out to be the sole reason, which introduces extra energy loss, creates band tail states and inhibits minority carrier transport. We thus propose to form homogeneous energy landscape to overcome the problem. A synergistic approach is conceived, by taking advantage of material structure and crystallization kinetic engineering. Accordingly, with the help of density functional theory guided material design, (aminomethyl) piperidinium quasi-2D perovskites are selected. The lowest energy distribution and homogeneous energy landscape are achieved through carefully regulating their crystallization kinetics. We conclude that homogeneous energy landscape significantly reduces the Shockley-Read-Hall recombination and suppresses the quasi-Fermi level splitting, which is crucial to achieve high V oc .

show abstract

Section: Crystallization Kinetics Regulation Corresponding Quasi-2dmentioning

confidence: 99%

Reduced-dimensional perovskite photovoltaics with homogeneous energy landscape

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Both binding energy between the layered structures and molecule dissociation energy of the DJ structure are much higher than the RP structure. Then, a DJ structural perovskite-based LED (26)(27)(28) using bidentate organic molecules BAB as bridging molecules was fabricated. We tracked the stability of the device at the point of the highest EQE and observed T 50 lifetime up to 100 hours, which is two orders of magnitude longer than that based on the RP structure based on PEA.…”

Section: Introductionmentioning

confidence: 99%

Highly stable hybrid perovskite light-emitting diodes based on Dion-Jacobson structure

et al. 2019

View full text Add to dashboard Cite

Organic-inorganic hybrid halide perovskites are emerging as promising materials for next-generation light-emitting diodes (LEDs). However, the poor stability of these materials has been the main obstacle challenging their application. Here, we performed first-principles calculations, revealing that the molecule dissociation energy of Dion-Jacobson (DJ) structure using 1,4-bis(aminomethyl)benzene molecules as bridging ligands is two times higher than the typical Ruddlesden-Popper (RP) structure based on phenylethylammonium ligands. Accordingly, LEDs based on the DJ structure show a half-lifetime over 100 hours, which is almost two orders of magnitude longer compared with those based on RP structural quasi–two-dimensional perovskite. To the best of our knowledge, this is the longest lifetime reported for all organic-inorganic hybrid perovskites operating at the current density, giving the highest external quantum efficiency (EQE) value. In situ tracking of the film composition in operation indicates that the DJ structure was maintained well after continuous operation under an electric field.

show abstract

“…Recently, two-dimensional (2D) hybrid organic inorganic perovskites (HOIP) have been used as the active layer for solar cells [1][2][3][4][5][6][7][8][9][10] and light emitting diodes. 11,12 Compared with their 3D counterparts (such as MAPbI 3 , where MA = methylammonium), they can offer superior stability and a much wider structural diversity, since the cation size is not limited by the volume of the cuboctahedral cavity in the 3D inorganic lattice.…”

Section: Introductionmentioning

confidence: 99%