Free Carrier, Exciton, and Phonon Dynamics in Lead‐Halide Perovskites Studied with Ultrafast Terahertz Spectroscopy

2019 ◽  
Vol 8 (3) ◽  
pp. 1900783 ◽  
Author(s):  
Daming Zhao ◽  
Elbert E. M. Chia
Keyword(s):  
Terahertz Spectroscopy ◽  
Free Carrier ◽  
Phonon Dynamics ◽  
Halide Perovskites ◽  
Lead Halide

scholarly journals Charge Carrier Dynamics in Sn-Doped Two-Dimensional Lead Halide Perovskites Studied by Terahertz Spectroscopy

2021 ◽  
Vol 9 ◽  
Author(s):  
Zhengyuan Qin ◽  
Chunfeng Zhang ◽  
Lan Chen ◽  
Xiaoyong Wang ◽  
Min Xiao
Keyword(s):  
Charge Carrier ◽  
Terahertz Spectroscopy ◽  
Early Stage ◽  
Carrier Dynamics ◽  
Charge Carriers ◽  
Two Dimensional ◽  
Sn Doping ◽  
Charge Carrier Dynamics ◽  
Halide Perovskites ◽  
Lead Halide

Sn doping is established as an effective approach to promote the light emission properties in in two-dimensional lead-halide perovskites. However, the effect on the charge carrier dynamics is largely unexplored. In this work, we conduct terahertz spectroscopy to study the effects of Sn doping on the charge dynamics in the two-dimensional perovskites PEA2SnxPb1–xI4 (PEA = phenethylammonium) with different doping levels. The spectral dispersion analysis suggests that the early-stage dynamics with lifetime of ∼ 2 ps is contributed by both the transport of hot charge carriers and the polarizability of hot excitons. The long-lived component of first-order charge carrier recombination is dramatically improved when Sn doping increases, which is ascribed to the equilibrium between charge carriers and excitons with smaller bind energies in the higher-level Sn-doped samples. The finding in this work suggests Sn doping is an effective approach to optimize the charge carrier transport in 2D perovskite for potential optoelectronic applications.

THERMAL TRANSPORT BEHAVIORS IN LEAD HALIDE PEROVSKITES

2018 ◽  
Author(s):  
Wee-Liat Ong ◽  
Giselle Elbaz ◽  
Evan A. Doud ◽  
Philip Kim ◽  
Daniel Paley ◽  
...  
Keyword(s):  
Thermal Transport ◽  
Halide Perovskites ◽  
Lead Halide

Revealing the Impact of Cesium/Rubidium Incorporation on the Photophysics of Multiple-Cation Lead Halide Perovskites

2019 ◽  
Author(s):  
Yajun Gao ◽  
Kai wang ◽  
mingcong wang ◽  
Jafar Khan ◽  
Ahmed Balawi ◽  
...  
Keyword(s):  
Halide Perovskites ◽  
The Impact ◽  
Lead Halide

Shedding Light on Optoelectronic Structure Rationalization and Photophysical Pathways in Lead Halide Perovskites - a Single Crystal Story

2018 ◽  
Author(s):  
Masoumeh Keshavarz ◽  
Steffen Wiedmann ◽  
Robert Küchler ◽  
Haifeng Yuan ◽  
Elke Debroye ◽  
...  
Keyword(s):  
Single Crystal ◽  
Halide Perovskites ◽  
Lead Halide

Extending the Compositional Space of Mixed Lead Halide Perovskites by Cs, Rb, K, and Na Doping

2018 ◽  
Vol 122 (25) ◽  
pp. 13548-13557 ◽  
Author(s):  
T. Jesper Jacobsson ◽  
Sebastian Svanström ◽  
Virgil Andrei ◽  
Jasmine P. H. Rivett ◽  
Nikolay Kornienko ◽  
...  
Keyword(s):  
Na Doping ◽  
Halide Perovskites ◽  
Compositional Space ◽  
Lead Halide

scholarly journals Optical Gain of Lead Halide Perovskites Measured via the Variable Stripe Length Method: What We Can Learn and How to Avoid Pitfalls

2021 ◽  
pp. 2001773
Author(s):  
Ada Lili Alvarado‐Leaños ◽  
Daniele Cortecchia ◽  
Giulia Folpini ◽  
Ajay Ram Srimath Kandada ◽  
Annamaria Petrozza
Keyword(s):  
Optical Gain ◽  
Halide Perovskites ◽  
Lead Halide ◽  
Stripe Length
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