scholarly journals Enhancing photoluminescence yields in lead halide perovskites by photon recycling and light out-coupling

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Johannes M. Richter ◽  
Mojtaba Abdi-Jalebi ◽  
Aditya Sadhanala ◽  
Maxim Tabachnyk ◽  
Jasmine P.H. Rivett ◽  
...  
Keyword(s):  
Halide Perovskites ◽  
Photon Recycling ◽  
Lead Halide

scholarly journals Origins of the long-range exciton diffusion in perovskite nanocrystal films: photon recycling vs exciton hopping

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
David Giovanni ◽  
Marcello Righetto ◽  
Qiannan Zhang ◽  
Jia Wei Melvin Lim ◽  
Sankaran Ramesh ◽  
...  
Keyword(s):  
Exciton Diffusion ◽  
Quantum Confinement Effects ◽  
Förster Energy Transfer ◽  
Perovskite Material ◽  
Nanocrystal Films ◽  
Halide Perovskites ◽  
Photon Recycling ◽  
Lead Halide ◽  
Perovskite Lattice ◽  
Diffusion Properties

AbstractThe outstanding optoelectronic performance of lead halide perovskites lies in their exceptional carrier diffusion properties. As the perovskite material dimensionality is reduced to exploit the quantum confinement effects, the disruption to the perovskite lattice, often with insulating organic ligands, raises new questions on the charge diffusion properties. Herein, we report direct imaging of >1 μm exciton diffusion lengths in CH3NH3PbBr3 perovskite nanocrystal (PNC) films. Surprisingly, the resulting exciton mobilities in these PNC films can reach 10 ± 2 cm2 V−1 s−1, which is counterintuitively several times higher than the carrier mobility in 3D perovskite films. We show that this ultralong exciton diffusion originates from both efficient inter-NC exciton hopping (via Förster energy transfer) and the photon recycling process with a smaller yet significant contribution. Importantly, our study not only sheds new light on the highly debated origins of the excellent exciton diffusion in PNC films but also highlights the potential of PNCs for optoelectronic applications.

scholarly journals Decoding ultrafast polarization responses in lead halide perovskites by the two-dimensional optical Kerr effect

2021 ◽  
Vol 118 (7) ◽  
pp. e2022268118
Author(s):  
Sebastian F. Maehrlein ◽  
Prakriti P. Joshi ◽  
Lucas Huber ◽  
Feifan Wang ◽  
Marie Cherasse ◽  
...  
Keyword(s):  
Kerr Effect ◽  
Light Propagation ◽  
Incident Light ◽  
Stimulated Emission ◽  
Optical Kerr Effect ◽  
Two Dimensional ◽  
Polarization Response ◽  
Halide Perovskites ◽  
Photon Recycling ◽  
Lead Halide

The ultrafast polarization response to incident light and ensuing exciton/carrier generation are essential to outstanding optoelectronic properties of lead halide perovskites (LHPs). A large number of mechanistic studies in the LHP field to date have focused on contributions to polarizability from organic cations and the highly polarizable inorganic lattice. For a comprehensive understanding of the ultrafast polarization response, we must additionally account for the nearly instantaneous hyperpolarizability response to the propagating light field itself. While light propagation is pivotal to optoelectronics and photonics, little is known about this in LHPs in the vicinity of the bandgap where stimulated emission, polariton condensation, superfluorescence, and photon recycling may take place. Here we develop two-dimensional optical Kerr effect (2D-OKE) spectroscopy to energetically dissect broadband light propagation and dispersive nonlinear polarization responses in LHPs. In contrast to earlier interpretations, the below-bandgap OKE responses in both hybrid CH3NH3PbBr3 and all-inorganic CsPbBr3 perovskites are found to originate from strong hyperpolarizability and highly anisotropic dispersions. In both materials, the nonlinear mixing of anisotropically propagating light fields results in convoluted oscillatory polarization dynamics. Based on a four-wave mixing model, we quantitatively derive dispersion anisotropies, reproduce 2D-OKE frequency correlations, and establish polarization-dressed light propagation in single-crystal LHPs. Moreover, our findings highlight the importance of distinguishing the often-neglected anisotropic light propagation from underlying coherent quasiparticle responses in various forms of ultrafast spectroscopy.

scholarly journals Photon Recycling by Energy Transfer in Piezochemically Synthesized and Close-Packed Methylammonium Lead Halide Perovskites

2019 ◽  
Vol 123 (45) ◽  
pp. 27752-27758 ◽  
Author(s):  
Sushant Ghimire ◽  
Kiyonori Takahashi ◽  
Yuta Takano ◽  
Takayoshi Nakamura ◽  
Vasudevanpillai Biju
Keyword(s):  
Energy Transfer ◽  
Halide Perovskites ◽  
Photon Recycling ◽  
Lead Halide

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
Sign in / Sign up

Export Citation Format

Share Document