Molecular Engineering of 2D Organic–Inorganic Hybrid Perovskites for Room-Temperature Warm-White Light Phosphorescence DOI

Guangyou Liu,

Zheng Lai,

Yuchen Yang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: May 15, 2025

Developing room-temperature phosphorescence (RTP) in organic-inorganic hybrid perovskites (OIHPs) with color tunability is an attractive topic for investigating how the coupling between organic and inorganic components affects spin-orbital effects triplet state energy transfer. We demonstrate that modulation of spacer cations OIHPs can effectively realize tunable white-light RTP. By gradually substituting 2-phenylethylamine (PEA) (PEA)2PbBr4 naphthalene-type (N-naphthyl methylamine, NMA), excitons be extracted from part transferred to produce a In particular, OIHP crystal stoichiometry (PEA)0.8(NMA)1.2PbBr4 leads warm-white light due contribution additional ultraviolet absorption, which was then exploited fabricate phosphorescent LED. A similar approach also applied 1-pyrenemethylamine (PRMA) cations. controlling content ratio PRMA PEA molecules, colorful emissions were realized (PEA)x(PRMA)2-xPbBr4 (0 ≤ x 2). The lifetimes (PEA)1.4(PRMA)0.6PbBr4 are 3.18 ms at 473 nm 3.02 618 nm, respectively. Our results provide effective strategy synthesizing multicolor by tuning different fluorophore molecules.

Language: Английский

Anion‐Cation Synergistic Regulation of Low‐Dimensional Perovskite Passivation Layer for Perovskite Solar Cells DOI Creative Commons
Shengwen Li, Hao Gu, Annan Zhu

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 24, 2025

Abstract Mixing 2D and 3D perovskite together is an effective strategy to enhance the stability of solar cells (PSCs). This has been widely used in many recent works. Typically, layer formed by introducing spacer onto surfaces through situ intercalation reaction. However, this may not stop after formed. Progressive migration into bulk leads increased n‐values phases deviation from optimized structural design. The high n‐value less stable than low be prone degradation under external stresses. Here, a heteroatom ammonium ligand, thiomorpholine (SMOR) found, which can effectively passivate surface, form 1D phase or depending on cation anion ratio type anions. Due lower formation energy at 1:1 ratio, prevent high‐n‐value show excellent thermal stability. passivation SMOR‐based boosts device efficiency 25.6% (certified 24.7%). More importantly, unpackaged maintain >80% its initial operation 85 °C for 1000 h.

Language: Английский

Citations

0
Recent Progress in Organic–Inorganic Hybrid Perovskites Quantum Dots DOI

Jianguo Cao,

Yue Geng, Lijie Wu

et al.

ChemistrySelect, Journal Year: 2025, Volume and Issue: 10(17)

Published: May 1, 2025

Abstract Perovskite materials are attractive star in the field of optoelectronics owing to their superior optoelectronic properties, quantum confinement effect, color tunability, high defect tolerance, and photoluminescence yield. Organic‐inorganic hybrid perovskite dots (OIHP‐QDs) have a wide range applications photovoltaic devices, photodetectors, light‐emitting diodes, especially solar cells, LEDs, lasers, due diverse choices organic cations that bring more tunable optical properties them. Here, basic principles, synthesis strategies, research progress, practical OIHP‐QDs based on latest results outlined. This review discusses key challenges limiting factors development while exploring future prospects.

Language: Английский

Citations

0
N‐Type Doping Characteristics Enabled by 1D Perovskite for Advancing Perovskite Photovoltaics: From 1.55 to 1.85 eV Bandgap DOI

Xianfang Zhou,

Fei Wang,

Yonggui Sun

et al.

Advanced Energy Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 15, 2025

Abstract Developing low‐dimensional perovskites to enhance both single‐junction and tandem solar cells is of great interest for improving photovoltaic performance durability. Herein, a novel 1D perovskite based on 1,3‐thiazole‐2‐carboximidamide (TZC) cation introduced, which exhibits robust chemical interactions with PbI 2 3D perovskite, enabling the fabrication high‐quality mixed‐dimensional films identified by HR‐TEM GIWAXS analyses. Benefiting from lower formation energy barrier perovskites, they can preferentially form act as crystal seeds regulate crystallization kinetics optimized morphology improved crystallinity. In addition effectively passivating surface defects suppressing nonradiative recombination, TZC‐enabled exhibit pronounced n‐type doping characteristics, leading an elevated Fermi level (from −4.63 −4.44 eV) facilitating charge carrier extraction transport in p‐i‐n devices. As result, this strategy not only significantly enhances power conversion efficiency (PCE) widely studied 1.55 eV bandgap but also boosts PCE 1.68 1.85 wide‐bandgap devices, achieving outstanding PCEs 22.52% 18.65%, respectively. These findings highlight immense potential TZC‐functionalized enhancing high‐performance cell applications.

Language: Английский

Citations

0
Molecular Engineering of 2D Organic–Inorganic Hybrid Perovskites for Room-Temperature Warm-White Light Phosphorescence DOI

Guangyou Liu,

Zheng Lai,

Yuchen Yang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: May 15, 2025

Developing room-temperature phosphorescence (RTP) in organic-inorganic hybrid perovskites (OIHPs) with color tunability is an attractive topic for investigating how the coupling between organic and inorganic components affects spin-orbital effects triplet state energy transfer. We demonstrate that modulation of spacer cations OIHPs can effectively realize tunable white-light RTP. By gradually substituting 2-phenylethylamine (PEA) (PEA)2PbBr4 naphthalene-type (N-naphthyl methylamine, NMA), excitons be extracted from part transferred to produce a In particular, OIHP crystal stoichiometry (PEA)0.8(NMA)1.2PbBr4 leads warm-white light due contribution additional ultraviolet absorption, which was then exploited fabricate phosphorescent LED. A similar approach also applied 1-pyrenemethylamine (PRMA) cations. controlling content ratio PRMA PEA molecules, colorful emissions were realized (PEA)x(PRMA)2-xPbBr4 (0 ≤ x 2). The lifetimes (PEA)1.4(PRMA)0.6PbBr4 are 3.18 ms at 473 nm 3.02 618 nm, respectively. Our results provide effective strategy synthesizing multicolor by tuning different fluorophore molecules.

Language: Английский

Citations

0