Molecular Structure Tailoring of Organic Spacers for High-Performance Ruddlesden–Popper Perovskite Solar Cells DOI Creative Commons

Pengyun Liu,

Xuejin Li, Tonghui Cai

и другие.

Nano-Micro Letters, Год журнала: 2024, Номер 17(1)

Опубликована: Окт. 10, 2024

Abstract Layer-structured Ruddlesden–Popper (RP) perovskites (RPPs) with decent stability have captured the imagination of photovoltaic research community and bring hope for boosting development perovskite solar cell (PSC) technology. However, two-dimensional (2D) or quasi-2D RP PSCs are encountered some challenges large exciton binding energy, blocked charge transport poor film quality, which restrict their performance. Fortunately, these issues can be readily resolved by rationally designing spacer cations RPPs. This review mainly focuses on how to design molecular structures organic spacers aims endow RPPs outstanding applications. We firstly elucidated important roles in impacting crystallization kinetics, transporting ability Then we brought three aspects attention spacers. Finally, presented specific structure strategies aiming improve performance PSCs. These proposed this will provide new avenues develop novel advance RPP technology future

Язык: Английский

Origin of Broad Emission Induced by Rigid Aromatic Ditopic Cations in Low-Dimensional Metal Halide Perovskites DOI Creative Commons
Marta Morana, Waldemar Kaiser, Rossella Chiara

и другие.

The Journal of Physical Chemistry Letters, Год журнала: 2023, Номер 14(35), С. 7860 - 7868

Опубликована: Авг. 28, 2023

The development of broadband emitters based on metal halide perovskites (MHPs) requires the elucidation structure–emission property correlations. Herein, we report a combined experimental and theoretical study series novel low-dimensional lead chloride perovskites, including ditopic aromatic cations. Synthesized their bromide analogues show both narrow broad photoluminescence emission properties as function cation nature. Structural analysis shows correlation between rigidity cations octahedral distortions. Density functional theory calculations reveal, in turn, pivotal role distortions formation self-trapped excitons, which are responsible for insurgence large Stokes shifts together with contribution vacancies. For considered MHP series, use conventional distortion parameters allows us to nicely describe trend properties, thus providing solid guide further materials design.

Язык: Английский

Процитировано

11

Impact of functional groups in spacer cations on the properties of PEA-based 2D monolayer halide perovskites DOI Creative Commons
Chenchen Li, Xian Chen, Tan Jin

и другие.

Nano Materials Science, Год журнала: 2024, Номер unknown

Опубликована: Март 1, 2024

Incorporating low-dimensionalization technologies effectively tackle the challenge of inadequate long-term stability in hybrid halide perovskites, however their wide bandgap and strong quantum well confinement remain substantial obstacle for various optoelectronic applications. Addressing these issues without compromising has emerged as a pivotal focus materials science, particular exploring effects functional groups within spacer cations. Our simulations reveal that robust π-π stacking interactions involving PEA+ hydrogen bonding between MX64− contribute to narrowing electronic 2D monolayer PEA2MX4 (e. g. PEA2SnI4: 1.34 ​eV) reasonable visible-light absorption while simultaneously ensuring favorable stability. Moreover, delocalized orbitals relatively high dielectric constants PEA+, attributed conjugated benzene ring, been observed weaken potential barrier, exciton binding effect PEA2MX4, thus facilitating photogenerated electron-hole separations out-of-plane carrier transport. The impact cations on transport properties perovskites highlights critical role meticulously chosen well-designed cations, especially groups, shaping photophysical even under extremely operating conditions.

Язык: Английский

Процитировано

4

Homogenizing The Low‐Dimensional Phases for Stable 2D‐3D Tin Perovskite Solar Cells DOI

Ziyong Kang,

Kun Wang, Lu Zhang

и другие.

Small, Год журнала: 2024, Номер 20(43)

Опубликована: Июль 6, 2024

2D-3D tin-based perovskites are considered as promising candidates for achieving efficient lead-free perovskite solar cells (PSCs). However, the existence of multiple low-dimensional phases formed during film preparation hinders transport charge carriers. In addition, non-homogeneous distribution leads to lattice distortion and increases defect density, which undesirable stability PSCs. Here, mixed spacer cations [diethylamine (DEA

Язык: Английский

Процитировано

4

Revealing the Universal Pressure‐Driven Behavior of Hybrid Halide Perovskites and Unique Optical Modifiability in Extremely Soft 2D Tin‐Based System DOI
Lingping Kong, Jue Gong, Ioannis Spanopoulos

и другие.

Advanced Functional Materials, Год журнала: 2024, Номер unknown

Опубликована: Сен. 2, 2024

Abstract As promising photovoltaic materials, halide perovskites display large structural modifiability specific to their organic‐inorganic hybrid lattices, thus providing key unlock many enhanced and novel physical properties. In particular, exhibit extraordinary functional responses mechanical stimulation due soft lattices. However, a general pattern describing the evolution of perovskite properties under pressure is missing, rendering such research without theoretical guidance further optimization optoelectronic performance. Here, framework delineating pressure‐dependent evolutions lattice structure, bandgap, photoluminescence (PL) across four distinct regions in all assuming 3D 2D structures unveiled, accrediting long‐range disorderness be common origin bandgap blueshift, PL annihilation, amorphization. Using developed model as an instructional guideline, optical luminescent quasi‐2D tin(II) iodide are revealed, where (C 4 H 9 NH 3 ) 2 (CH )Sn I 7 + : butylammonium; CH methylammonium) found softest (bulk modulus ≈4.8 GPa) known so far. By meticulously choosing appropriate peak ≈4 GPa, shows irreversible defect healing (carrier lifetime prolongation from 22 ns) permanent enhancement upon decompression ambient condition, signifying practicality pressure‐driven behaviors unveiled this work.

Язык: Английский

Процитировано

4

Molecular Structure Tailoring of Organic Spacers for High-Performance Ruddlesden–Popper Perovskite Solar Cells DOI Creative Commons

Pengyun Liu,

Xuejin Li, Tonghui Cai

и другие.

Nano-Micro Letters, Год журнала: 2024, Номер 17(1)

Опубликована: Окт. 10, 2024

Abstract Layer-structured Ruddlesden–Popper (RP) perovskites (RPPs) with decent stability have captured the imagination of photovoltaic research community and bring hope for boosting development perovskite solar cell (PSC) technology. However, two-dimensional (2D) or quasi-2D RP PSCs are encountered some challenges large exciton binding energy, blocked charge transport poor film quality, which restrict their performance. Fortunately, these issues can be readily resolved by rationally designing spacer cations RPPs. This review mainly focuses on how to design molecular structures organic spacers aims endow RPPs outstanding applications. We firstly elucidated important roles in impacting crystallization kinetics, transporting ability Then we brought three aspects attention spacers. Finally, presented specific structure strategies aiming improve performance PSCs. These proposed this will provide new avenues develop novel advance RPP technology future

Язык: Английский

Процитировано

4