scholarly journals Ultrafast correlated charge and lattice motion in a hybrid metal halide perovskite

2019 ◽  
Vol 5 (5) ◽  
pp. eaaw5558 ◽  
Author(s):  
Yang Lan ◽  
Benjamin J. Dringoli ◽  
David A. Valverde-Chávez ◽  
Carlito S. Ponseca ◽  
Mark Sutton ◽  
...  
Keyword(s):  
Room Temperature ◽  
Longitudinal Optical ◽  
Metal Halide ◽  
Thz Spectroscopy ◽  
Time Resolved ◽  
Carrier Lifetimes ◽  
Metal Halide Perovskite ◽  
Coherent Coupling ◽  
Halide Perovskites ◽  
Correlated Motion

Hybrid organic-inorganic halide perovskites have shown remarkable optoelectronic properties, exhibiting an impressive tolerance to defects believed to originate from correlated motion of charge carriers and the polar lattice forming large polarons. Few experimental techniques are capable of directly probing these correlations, requiring simultaneous sub–millielectron volt energy and femtosecond temporal resolution after absorption of a photon. Here, we use time-resolved multi-THz spectroscopy, sensitive to the internal excitations of the polaron, to temporally and energetically resolve the coherent coupling of charges to longitudinal optical phonons in single-crystal CH3NH3PbI3 (MAPI). We observe room temperature intraband quantum beats arising from the coherent displacement of charge from the coupled phonon cloud. Our measurements provide strong evidence for the existence of polarons in MAPI at room temperature, suggesting that electron/hole-phonon coupling is a defining aspect of the hybrid metal-halide perovskites contributing to the protection from scattering and enhanced carrier lifetimes that define their usefulness in devices.

scholarly journals Room-temperature random lasing of metal-halide perovskites via morphology-controlled synthesis

2020 ◽  
Vol 2 (12) ◽  
pp. 5833-5840
Author(s):  
Yu-Heng Hong ◽  
Tsung Sheng Kao
Keyword(s):  
Room Temperature ◽  
Metal Halide ◽  
Controlled Synthesis ◽  
Film Morphology ◽  
Optical Performance ◽  
Random Lasing ◽  
Structural Configuration ◽  
Metal Halide Perovskite ◽  
Halide Perovskites ◽  
Halide Perovskite

Film morphology and the corresponding structural configuration can profoundly affect the optical performance, especially the random lasing action in organic–inorganic metal-halide perovskite thin films.

scholarly journals Mechanism of Additive-Assisted Room-Temperature Processing of Metal Halide Perovskite Thin Films

2021 ◽  
Author(s):  
Maged Abdelsamie ◽  
Tianyang Li ◽  
Finn Babbe ◽  
Junwei Xu ◽  
Qiwei Han ◽  
...  
Keyword(s):  
Thin Films ◽  
Room Temperature ◽  
Metal Halide ◽  
Metal Halide Perovskite ◽  
Halide Perovskite

scholarly journals Tailoring the electron and hole dimensionality to achieve efficient and stable metal halide perovskite scintillators

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Zhifang Tan ◽  
Jincong Pang ◽  
Guangda Niu ◽  
Jun-Hui Yuan ◽  
Kan-Hao Xue ◽  
...  
Keyword(s):  
Water Solubility ◽  
Radiation Stability ◽  
Metal Halide ◽  
Lead Free ◽  
X Ray ◽  
Metal Halide Perovskite ◽  
Bonding Interaction ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Low X

Abstract Metal halide perovskites have recently been reported as excellent scintillators for X-ray detection. However, perovskite based scintillators are susceptible to moisture and oxygen atmosphere, such as the water solubility of CsPbBr3, and oxidation vulnerability of Sn2+, Cu+. The traditional metal halide scintillators (NaI: Tl, LaBr3, etc.) are also severely restricted by their high hygroscopicity. Here we report a new kind of lead free perovskite with excellent water and radiation stability, Rb2Sn1-x Te x Cl6. The equivalent doping of Te could break the in-phase bonding interaction between neighboring octahedra in Rb2SnCl6, and thus decrease the electron and hole dimensionality. The optimized Te content of 5% resulted in high photoluminescence quantum yield of 92.4%, and low X-ray detection limit of 0.7 µGyair s−1. The photoluminescence and radioluminescence could be maintained without any loss when immersing in water or after 480,000 Gy radiations, outperforming previous perovskite and traditional metal halides scintillators.

An Above-Room-Temperature Ferroelectric Organo-Metal Halide Perovskite: (3-Pyrrolinium)(CdCl3)

2014 ◽  
Vol 53 (42) ◽  
pp. 11242-11247 ◽  
Author(s):  
Heng-Yun Ye ◽  
Yi Zhang ◽  
Da-Wei Fu ◽  
Ren-Gen Xiong
Keyword(s):  
Room Temperature ◽  
Metal Halide ◽  
Metal Halide Perovskite ◽  
Halide Perovskite

scholarly journals High-sensitivity high-resolution X-ray imaging with soft-sintered metal halide perovskites

2021 ◽  
Vol 4 (9) ◽  
pp. 681-688
Author(s):  
Sarah Deumel ◽  
Albert van Breemen ◽  
Gerwin Gelinck ◽  
Bart Peeters ◽  
Joris Maas ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Metal Halide ◽  
Detector Arrays ◽  
X Ray ◽  
Carrier Lifetimes ◽  
Sintered Metal ◽  
X Ray Imaging ◽  
Imaging Detector ◽  
High Carrier ◽  
Halide Perovskites

AbstractTo realize the potential of artificial intelligence in medical imaging, improvements in imaging capabilities are required, as well as advances in computing power and algorithms. Hybrid inorganic–organic metal halide perovskites, such as methylammonium lead triiodide (MAPbI3), offer strong X-ray absorption, high carrier mobilities (µ) and long carrier lifetimes (τ), and they are promising materials for use in X-ray imaging. However, their incorporation into pixelated sensing arrays remains challenging. Here we show that X-ray flat-panel detector arrays based on microcrystalline MAPbI3 can be created using a two-step manufacturing process. Our approach is based on the mechanical soft sintering of a freestanding absorber layer and the subsequent integration of this layer on a pixelated backplane. Freestanding microcrystalline MAPbI3 wafers exhibit a sensitivity of 9,300 µC Gyair–1 cm–2 with a μτ product of 4 × 10–4 cm2 V–1, and the resulting X-ray imaging detector, which has 508 pixels per inch, combines a high spatial resolution of 6 line pairs per millimetre with a low detection limit of 0.22 nGyair per frame.

Recent developments in fabrication and performance of metal halide perovskite field-effect transistors

2020 ◽  
Vol 8 (47) ◽  
pp. 16691-16715
Author(s):  
Yu Liu ◽  
Ping-An Chen ◽  
Yuanyuan Hu
Keyword(s):  
Field Effect ◽  
Field Effect Transistors ◽  
Metal Halide ◽  
Device Performance ◽  
Metal Halide Perovskite ◽  
Recent Developments ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
And Performance

Recent developments in fabrication strategies and device performance of field-effect transistors based on metal halide perovskites are reviewed.

scholarly journals Comment on “ferroelectricity-free lead halide perovskites” by A. Gómez, Q. Wang, A. R. Goñi, M. Campoy-Quiles and A. Abate, Energy Environ. Sci., 2019, 12, 2537

2020 ◽  
Vol 13 (6) ◽  
pp. 1888-1891
Author(s):  
Alexander Colsmann ◽  
Tobias Leonhard ◽  
Alexander D. Schulz ◽  
Holger Röhm
Keyword(s):  
Thin Films ◽  
Metal Halide ◽  
Organic Metal ◽  
Metal Halide Perovskite ◽  
Halide Perovskites ◽  
Halide Perovskite ◽  
Lead Halide ◽  
Energy Environ

This comment analyzes pitfalls when investigating piezoresponse and ferroelectricity in organic-metal halide perovskite thin films.

scholarly journals Monitoring Electron–Phonon Interactions in Lead Halide Perovskites Using Time-Resolved THz Spectroscopy

ACS Nano ◽  
2019 ◽  
Vol 13 (8) ◽  
pp. 8826-8835 ◽  
Author(s):  
Daming Zhao ◽  
Hongwei Hu ◽  
Reinhard Haselsberger ◽  
Rudolph A. Marcus ◽  
Maria-Elisabeth Michel-Beyerle ◽  
...  
Keyword(s):  
Thz Spectroscopy ◽  
Time Resolved ◽  
Halide Perovskites ◽  
Lead Halide
Sign in / Sign up

Export Citation Format

Share Document