Perovskite heteroepitaxy for high-efficiency and stable pure-red LEDs

Nature, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 19, 2025

Language: Английский

---

Major challenges for commercialization of perovskite solar cells: A critical review

Energy Reports, Journal Year: 2025, Volume and Issue: 13, P. 1400 - 1415

Published: Jan. 16, 2025

Language: Английский

---

Recent Progress in Lead Free Tin‐Halide Perovskite Materials Based Solar Cells via SCAPS Based Numerical Simulation

ChemistrySelect, Journal Year: 2024, Volume and Issue: 9(31)

Published: Aug. 14, 2024

Abstract Energy demand has dramatically increased globally, posing a serious risk of future energy crises. While various sources have been utilized, solar emerged as the most promising renewable option, convertible to electrical via cells. Among developed cells, perovskite cells (PSCs) recently received significant attentions due their simple fabrication, high performance, and cost‐effectiveness. In particular, lead (Pb) halide‐based PSCs achieved highest power conversion efficiency. However, despite excellent Pb are hindered by toxicity in structures. Consequently, researchers explored germanium (Ge) tin (Sn) halide materials for development Pb‐free (LFPSCs). The past few years seen rapid advancements numerical simulation LFPSCs using SCAPS software. These studies crucial developing with enhanced performance. This mini‐review article summarizes recent progress tin‐based LFPSCs.

Language: Английский

---

Topological Nodal-Point Superconductivity in Two-Dimensional Ferroelectric Hybrid Perovskites

Nano Letters, Journal Year: 2024, Volume and Issue: 24(9), P. 2705 - 2711

Published: Jan. 19, 2024

Two-dimensional (2D) hybrid organic–inorganic perovskites (HOIPs) with enhanced stability, high tunability, and strong spin–orbit coupling have shown great potential in vast applications. Here, we extend the already rich functionality of 2D HOIPs to a new territory, realizing topological superconductivity Majorana modes for fault-tolerant quantum computation. Especially, predict that room-temperature ferroelectric BA2PbCl4 (BA benzylammonium) exhibits nodal-point (NSC) gapless on selected edges domain walls when proximity-coupled an s-wave superconductor in-plane Zeeman field, attractive experimental verification application. Since NSC is protected by spatial symmetry HOIPs, envision more exotic superconducting states be found this class materials due their diverse noncentrosymmetric space groups, which may open avenue fields superconductivity.

Language: Английский

---

Enhancing Photodetector Performance via Interlayer Energy Transfer in 2D Hybrid Perovskite Heterostructures

Journal of Physics D Applied Physics, Journal Year: 2025, Volume and Issue: 58(13), P. 135115 - 135115

Published: Jan. 31, 2025

Abstract Two-dimensional (2D) organic–inorganic hybrid perovskites (OIHPs) have emerged as promising materials for optoelectronic devices due to their exceptional properties. However, application is often hindered by limited charge transfer (CT) capabilities, attributed the insulating organic spacer layers. In this study, we address challenge introducing a BA 2 MA Pb 3 I 10 /PEA heterostructure, which leverages interlayer energy (ET) overcome CT limitations. This ET mechanism leads substantial enhancement in photoluminescence (PL) emission, with heterostructure displaying ∼2.4-fold increase PL intensity compared pristine PEA . Additionally, encapsulating boosts emission 5.2 times. The impact of on device performance was further demonstrated photodetectors based heterostructure. These exhibited significant improvements photoresponse, achieving maximum responsivity A W −1 , are almost times greater than those fabricated from individual and devices. demonstrates rapid response times, rise time 7 ms decay 4 ms, significantly outperforming both pure (450 rise, 470 decay) (350 370 decay). findings highlight an effective strategy enhancing 2D OIHP-based devices, paving way high-efficiency applications future other technologies.

Language: Английский

---

Organic–inorganic hexahalometalate-crystal semiconductor K₂(Sn, Se, Te)Br₆ hybrid double perovskites for solar energy applications

RSC Advances, Journal Year: 2025, Volume and Issue: 15(15), P. 11923 - 11933

Published: Jan. 1, 2025

Hybrid organic, halide, and divalent metal double perovskites K 2 (Sn, Se, Te)Br 6 with cubic structures were computationally evaluated using the generalized-gradient approximation (GGA) modified Becke–Johnson (mBJ-GGA) functionals.

Language: Английский

---

Polar Bilayered Dion–Jacobson Hybrid Perovskite Single Crystal with Bulk Photovoltaic Effect for Self-Driven X-ray–Ultraviolet–Visible Photodetection

Chemistry of Materials, Journal Year: 2023, Volume and Issue: 35(22), P. 9806 - 9816

Published: Nov. 13, 2023

Polar two-dimensional (2D) multilayered hybrid perovskites (HPs) have emerged as an outstanding class of self-driven photodetection materials. However, the current market for is almost dominated by Ruddlesden–Popper (RP) HPs. Up to now, most Dion–Jacobson (DJ) HPs reported crystallized in centrosymmetric space group, so based on this needs be driven external circuits, which not only increases cost device but also limits flexibility and photostability device. Therefore, constructing a broadband system that integrates sensing energy supply DJ development trend future. Herein, we constructed two new polar (1,3-BMACH)(MA)Pb2I7 (1,3-BMACH)(FA)Pb2I7 (1,3-BMACH 1,3-bis(aminomethyl)cyclohexane, MA methylammonium, FA formamidinium) using cyclic diammonium spacer MA, perovskitizers, respectively. Due larger size than elongation Pb–I bond length results (λcutoff = 630 nm) having narrower light absorption range 650 nm). The devices single crystals can achieve high-efficiency from X-ray ultraviolet visible-light region. detection has high sensitivity (199 μC Gyair–1 cm–2) low limit (106 nGyair s–1). Especially, detectivity responsivity reach 4.82 × 1010 Jones 0.58 mA/W under zero bias at 405 nm laser illumination. Meanwhile, exhibit reversible thermochromic transformation red dark red.

Language: Английский

---

Ultrafast All-Optical Modulation and Efficient Third-Harmonic Generation in Two-Dimensional Perovskite Heterostructures

ACS Photonics, Journal Year: 2024, Volume and Issue: 11(2), P. 604 - 612

Published: Jan. 8, 2024

Ultrafast all-optical modulation and efficient frequency conversion are highly required for a wide range of applications including optical communication, microwave photonics, quantum computing. However, the ultrafast light–matter interactions challenging available optoelectronic materials. Here, we demonstrate solution-processable two-dimensional halide organic–inorganic perovskite (2D HOIP) heterostructures can exhibit third-harmonic generation experimentally. We fabricated 2D HOIP heterostructure film (PEA)2PbI4/(PEA)2(MA)2Pb3I10 by one-step spin-casting method found that produce emission with larger efficiency (η = 2 × 10–5) than other typical perovskites In addition, time-resolved transient absorption spectroscopy reveals transfer path photocarriers in heterostructures, while sub-picosecond relaxation ∼−4.85% nonlinear have been observed at band edge. Our results suggest serve as an ideal platform wavelength may pave way developing high-performance cost-effective devices.

Language: Английский

---

Harnessing Conformational Disorder of Organic Cations for Efficient Blue Quasi‐2D Perovskite LEDs

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(14)

Published: Feb. 4, 2024

Abstract Despite quasi‐2D perovskite offering great control over the optoelectronic properties, disordered organic cations are often perceived as detrimental to device performance, primarily affecting charge carrier mobility. However, it is proposed that such cations‐enabled excellent excitonic properties can be beneficial for fabricating high‐efficiency light‐emitting diodes (PeLEDs) facilitated by reduced dielectric screening effect. Here, incorporating acetamidinium bromide additives, conformational disorder of cation precisely manipulated and meticulously probed using sum frequency generation vibrational spectroscopy. Finally, a distinctive inverse relationship elucidated between degree order, characterized relative structure ordering , key performance metrics photoluminescence quantum yield external efficiency (EQE). By optimizing configurational disorder, sky‐blue (485 nm) PeLEDs achieve noteworthy EQE 14.42% exhibit significantly prolonged operational stability in open‐air conditions. This finding underscores potential advantages enhancing exciton radiative recombination efficiency.

Language: Английский

---

Switchable planar chirality and spin texture in highly ordered ferroelectric hybrid perovskite domains

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Nov. 25, 2024

Chiral organic-inorganic hybrid perovskites offer a promising platform for developing non-linear chiro-optical applications and chiral-induced spin selectivity. Here, we show that achiral have highly ordered ferroelectric domains with orthogonal polarization exhibit planar chirality, as manifested by second harmonic generation strong circular dichroism. Interestingly, the handedness of dichroism response can be alternatingly switched between orthogonally polarized domain walls. To correlate origin chirality in these domains, atom-resolved atomic force microscopy is used to reveal distinct arrangements rows crystals indicate symmetry breaking. Remarkably, large SHG anisotropy factor 0.41 measured at wall. Additionally, spatially resolved two-photon photoluminescence excitation measurement provide evidence larger Rashba spin-splitting chiral compared domain-free areas. Our discoveries domain-dependent texture hold great promise advancement domain-specific applications.

Language: Английский

---