Making and Breaking of Exciton Cooling Bottlenecks in Halide Perovskite Nanocrystals DOI
Jia Wei Melvin Lim, Yuanyuan Guo, Minjun Feng

et al.

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 146(1), P. 437 - 449

Published: Dec. 30, 2023

Harnessing quantum confinement (QC) effects in semiconductors to retard hot carrier cooling (HCC) is an attractive approach for enabling efficient extraction overcome the Shockley–Queisser limit. However, there a debate about whether halide perovskite nanocrystals (PNCs) can effectively exploit these effects. To address this, we utilized pump–probe and multipulse pump–push–probe spectroscopy investigate HCC behavior PNCs of varying sizes cation compositions. Our results validate presence intrinsic phonon bottleneck with clear manifestations QC small CsPbBr3 exhibiting slower rates compared those larger PNCs. replacement inorganic Cs+ organic cations suppresses this bottleneck. Furthermore, exhibit distinct size-dependent response changes cold densities. We attribute enhanced exciton–exciton interactions strongly confined that facilitate Auger heating. Importantly, our findings dispel existing controversy provide valuable insights into design principles engineering PNC applications.

Language: Английский

Lead‐Free Halide Perovskite Materials and Optoelectronic Devices: Progress and Prospective DOI Creative Commons
Iago López‐Fernández, Donato Valli,

Chunyun Wang

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(6)

Published: Oct. 27, 2023

Abstract Halide perovskites, in the form of thin films and colloidal nanocrystals, have recently taken semiconductor optoelectronics research by storm, emerged as promising candidates for high‐performance solar cells, light‐emitting diodes (LEDs), lasers, photodetectors, radiation detectors. The impressive optical optoelectronic properties, along with rapid increase efficiencies cells LEDs, greatly attracted researchers across many disciplines. However, most advances made so far terms preparation (colloidal nanocrystals films), devices highest are based on Pb‐based halide which raised concerns over their commercialization due to toxicity Pb. This has triggered search lower‐toxicity Pb‐free perovskites led significant progress last few years. In this roadmap review, different expertise joined together summarize latest progress, outstanding challenges, future directions perovskite regarding synthesis, spectroscopy, devices, guide currently working area well those that will join field future.

Language: Английский

Citations

133
A Self‐Powered UV Photodetector With Ultrahigh Responsivity Based on 2D Perovskite Ferroelectric Films With Mixed Spacer Cations DOI
Linjuan Guo,

Yaqian Qi,

Zihao Wu

et al.

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(47)

Published: Sept. 8, 2023

Self-powered photodetectors (PDs) have the advantages of no external power requirement, wireless operation, and long life. Spontaneous ferroelectric polarizations can significantly increase built-in electric field intensity, showing great potential in self-powered photodetection. Moreover, ferroelectrics possess pyroelectric piezoelectric properties, beneficial for enhancing PDs. 2D metal halide perovskites (MHPs), which are suitable fabricating high-performance However, research on focuses growing bulk crystals. Herein, perovskite films with mixed spacer cations PDs demonstrated by mixing Ruddlesden-Popper (RP)-type Dion-Jacobson (DJ)-type perovskite. The (BDA0.7 (BA2 )0.3 )(EA)2 Pb3 Br10 film possesses, overall, best qualities crystalline quality, lowest trap density, good phase purity, obvious ferroelectricity. Based ferro-pyro-phototronic effect, PD at 360 nm exhibits excellent photoelectric an ultrahigh peak responsivity greater than 93 A W-1 a detectivity 2.5 × 1015 Jones, together reproducibility stability. maximum responsivities be modulated piezo-phototronic effect effective enhancement ratio 480%. This work will open up new route designing MHP offers opportunity to utilize it various optoelectronics applications.

Language: Английский

Citations

34
Copper-based perovskites and perovskite-like halides: A review from the perspective of molecular level DOI

Jiansen Wen,

Kun Rong,

Linqin Jiang

et al.

Nano Energy, Journal Year: 2024, Volume and Issue: 128, P. 109802 - 109802

Published: May 31, 2024

Language: Английский

Citations

9
Nanoscale 0D/1D Heterojunction of MAPbBr3/COF Toward Efficient LED-Driven S–S Coupling Reactions DOI
Ying Wang, Han Li,

Qianying Lin

et al.

ACS Catalysis, Journal Year: 2023, Volume and Issue: 13(23), P. 15493 - 15504

Published: Nov. 16, 2023

Precise and efficient management of disulfide bonds will offer multiple merits for the development organosulfur chemistry, pharmacology, life sciences. However, current S–S coupling synthesis strategy encounters bottlenecks in conforming to separation products, which limits its industrial-scale application. In view superoxide radical-triggered reaction mechanism coupling, this study demonstrates a multifunctional situ-assembled 0D/1D S-scheme heterojunction photocatalyst (MAPB-T-COF) constructed by MAPbBr3 quantum dots imine covalent organic framework (COF) nanowires under guidance band engineering management. MAPB-T-COF exhibits superior photocatalytic performance conversion 4-methylbenzenethiol (4-MBT) p-tolyl (PTD) blue LED illumination. Specifically, it achieves an impressive 100% yield with record photon efficiency as high 12.76%, well universal availability various derivatives, rivaling all incumbent similar systems. This not only highlights effectiveness nanoscale photocatalysis but also perfect trade-off between efficiencies strong chemical redox potentials. addition, free radical that triggers was monitored situ electron paramagnetic resonance (EPR) instrument, provided meaningful insights into mechanism. may inspire photoelectric devices, photoelectrodes, photocatalysts utilizing nanoscale, low-dimensional heterojunctions.

Language: Английский

Citations

17
Surface Passivation to Enhance the Interfacial Pyro-Phototronic Effect for Self-Powered Photodetection Based on Perovskite Single Crystals DOI
Linjuan Guo, Yi Song, Baorong Wang

et al.

ACS Applied Materials & Interfaces, Journal Year: 2024, Volume and Issue: 16(13), P. 16482 - 16493

Published: March 20, 2024

The interfacial pyro-phototronic effect (IPPE) presents a novel approach for improving the performance of self-powered photodetectors (PDs) based on metal halide perovskites (MHPs). contact conditions within Schottky junctions are crucial in facilitating IPPE phenomenon. However, fabrication an ideal junction utilizing MHPs is challenging endeavor. In this study, we present surface passivation method aimed at enhancing inverted planar perovskite structures micro- and nanoscale metal-halide SCs. Our findings demonstrate that incorporation lead salt with benzene ring moiety leads to substantial improvement photoresponses by means IPPE. Conversely, inclusion alkane chain impedes underlying mechanism can be elucidated through examination band structure, particularly work function (WF) modulated passivation. Consequently, alteration affects bending built-in field (VBi) interface. This strategy feasible effective producing pyroelectricity MHPs, thus its potential application practical contexts such as energy conversion infrared sensors.

Language: Английский

Citations

6
Organic Ligand Engineering for Tailoring Electron–Phonon Coupling in 2D Hybrid Perovskites DOI

Zhenwei Ou,

Cheng Wang,

Zhi-Guo Tao

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(20), P. 5975 - 5983

Published: May 10, 2024

In the emerging two-dimensional organic–inorganic hybrid perovskites, electronic structures and carrier behaviors are strongly impacted by intrinsic electron–phonon interactions, which have received inadequate attention. this study, we report an intriguing phenomenon of negative diffusion induced coupling in (2T)2PbI4. Theoretical calculations reveal that drives band alignment (2T)2PbI4 to alternate between type I II heterostructures. As a consequence, photoexcited holes undergo transitions organic ligands inorganic layers, resulting abnormal transport behavior compared other perovskites. These findings provide valuable insights into role shaping alignments They also open up exciting avenues for designing fabricating functional semiconductor heterostructures with tailored properties.

Language: Английский

Citations

6
Robust excitonic light emission in 2D tin halide perovskites by weak excited state polaronic effect DOI Creative Commons
Hongzhi Zhou,

Qingjie Feng,

Cheng Sun

et al.

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

Published: Oct. 2, 2024

Language: Английский

Citations

6
Synergistic Effect of Ionic Liquid and Embedded QDs on 2D Ferroelectric Perovskite Films with Narrow Phase Distribution for Self-Powered and Broad-Band Photodetectors DOI
Linjuan Guo, Xiaoran Yang, Liang Yu

et al.

Nano Letters, Journal Year: 2024, Volume and Issue: 24(37), P. 11599 - 11606

Published: Sept. 4, 2024

2D layered metal halide perovskites (MHPs) are a potential material for fabricating self-powered photodetectors (PDs). Nevertheless, MHPs produced via solution techniques frequently exhibit multiple quantum wells, leading to notable degradation in the device performance. Besides, wide band gap limits their broad-band photodetection. Integrating narrow-band materials with perovskite matrices is viable strategy PDs. In this study, use of methylamine acetate (MAAc) as an additive precursors can effectively control width wells (QWs). The amount MAAc greatly affects phase purity. Subsequently, PbSe QDs were embedded into matrix broadened absorption spectrum and no negative effects on ferroelectric properties. PM6:Y6 was combined hybrid films create PD enhanced performance due ferro-pyro-phototronic effect, reaching peak responsivity 2.4 A W

Language: Английский

Citations

5
Amplifying photoreduction efficacy of Bi-Sb bimetallic nanocrystals: Manipulating carrier dynamics to boost CO2-to-CO conversion DOI Open Access
Jie Tian, Zhijian Wang,

Yaqin Hou

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 340, P. 123272 - 123272

Published: Sept. 6, 2023

Language: Английский

Citations

12
Halide perovskite for enhancing photocatalytic efficiency: basic characteristics, nanostructure engineering and applications DOI
Yuxin Zhang, Zhihao Yu, Ming Zhang

et al.

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(31), P. 19757 - 19782

Published: Jan. 1, 2024

This review focuses on nanostructure engineering of halide perovskites from three perspectives: size morphology, composition and interfacial engineering, then reviews its applications in five fields also summarises stability strategies.

Language: Английский

Citations

4